You can then eliminate those rows by means of the NOT EXISTS predicate against a subquery, e.g. "My object"). SQL statements that use the EXISTS Condition in SQLite are very inefficient since the sub-query is RE-RUN for EVERY row in the outer query's table. The WELCOME letters are sold separately here. A value of 0 effectively disables Time Travel for the schema. This is a DIY insert for our WELCOME front porch sign. vikramk271 04-Nov-20 1 0. Assuming that index columns of the frame have names, this method will use those columns as the PRIMARY KEY of the table. What I do really like are the options for replacing or only creating if not exists: Or we can simply say, SQL Server Not Exists operator will return the results exactly opposite to the result returned by the Subquery. when i insert on tb_coba1 there will insert automatic on tb_coba2 , but it will be not insert automatic on tb_coba2 when new.nis and new.semester is exists and my trigger create or replace trigger t_cb after insert on tb_coba1 for each row begin IF NOT not exists (select * from tb_coba2 where nis = :new.nis and semester = :new.semester) THEN Intro. In addition, this command can be used to clone an existing schema, either at its current state or at a specific time/point in the past (using Time Travel).For more information about cloning a schema, see Cloning Considerations.. See also: For example, the following clause would insert 3 rows in a 3-column table, with values 1, 2, and 3 in the first two … You only have to specify the values, but you have to pass all values in order. We offer this glue to glue the pieces together. In the Connection Manager tab, select the Connection manager previously created. EXISTS and NOT EXISTS are used with a subquery in WHERE clause to examine if the result the subquery returns is TRUE or FALSE. (magnets are included). Creates a new schema in the current database. BMC, Control-M support Snowflake. dropped schemas in Time Travel contribute to data storage for your account. CREATE EVENT IF NOT EXISTS is always replicated, whether or not the event named in the statement already exists on the source. Kindly clarify if I miss anything. In regular schemas, the owner of an object (i.e. Snowflake syntax also supports IDENTITY(seed, increment) if you want to define that at a table level. That is like a single table sequence but might help in migrating SQL Server code. The WELCOME letters are sold separately here. Using INSERT IGNORE effectively causes MySQL to ignore execution errors while attempting to perform INSERT statements. If validation fails, then it will return the result in JSON only. This comes unfinished. schema is permanent). Orders placed after Dec. 16th will ship in early January. If Exists (BioId, FName, LName, Degree from dbo.Table1 T1) where T1.BioId Not In (Select BioID From Table2) And T1.FName Not In (Select FirstName From Table2) And T1.LName Not In (Select LastName From Table2) And T1.Degree Not In(Select LastName From Table2) Begin Update Table2 Set DegreeName = Degree End Else Begin If it exists, it will be overwritten by default. This means that an INSERT IGNORE statement which contains a duplicate value in a UNIQUE index or PRIMARY KEY field does not produce an error, but will instead simply ignore that particular INSERT command entirely. OR REPLACE keyword is specified in the command. in the past (using Time Travel). Using the lookup component, you know which entries from the data source already exist in Snowflake and which ones are new. Formally, it answers the question “ does a city exist with a store that is not in Stores ”?But it is easier to say that a nested NOT EXISTS answers the question “ is x TRUE for all y?. Snowflake’s cloud data platform helps customers to accelerate the data-driven enterprise with Snowflake’s market-leading, built-for-cloud data warehouse and Control-M, our market-leading enterprise application workflow orchestration platform. For details about key-pair authentication, see the Snowflake documentation. The stored procedure in snowflake supports the try-catch block functionality as well. In addition, by definition, all tables created in a transient schema are transient. Map the Lookup No Match Output to a Snowflake destination component. 450 Concard Drive, San Mateo, CA, 94402, United States | 844-SNOWFLK (844-766-9355), © 2020 Snowflake Inc. All Rights Reserved, Storage Costs for Time Travel and Fail-safe, -------------------------------+--------------------+------------+------------+---------------+--------------+-----------------------------------------------------------+---------+----------------+, | created_on | name | is_default | is_current | database_name | owner | comment | options | retention_time |, |-------------------------------+--------------------+------------+------------+---------------+--------------+-----------------------------------------------------------+---------+----------------|, | 2018-12-10 09:34:02.127 -0800 | INFORMATION_SCHEMA | N | N | MYDB | | Views describing the contents of schemas in this database | | 1 |, | 2018-12-10 09:33:56.793 -0800 | MYSCHEMA | N | Y | MYDB | PUBLIC | | | 1 |, | 2018-11-26 06:08:24.263 -0800 | PUBLIC | N | N | MYDB | PUBLIC | | | 1 |, -------------------------------+--------------------+------------+------------+---------------+--------------+-----------------------------------------------------------+-----------+----------------+, | created_on | name | is_default | is_current | database_name | owner | comment | options | retention_time |, |-------------------------------+--------------------+------------+------------+---------------+--------------+-----------------------------------------------------------+-----------+----------------|, | 2018-12-10 09:34:02.127 -0800 | INFORMATION_SCHEMA | N | N | MYDB | | Views describing the contents of schemas in this database | | 1 |, | 2018-12-10 09:33:56.793 -0800 | MYSCHEMA | N | Y | MYDB | PUBLIC | | | 1 |, | 2018-11-26 06:08:24.263 -0800 | PUBLIC | N | N | MYDB | PUBLIC | | | 1 |, | 2018-12-10 09:35:32.326 -0800 | TSCHEMA | N | Y | MYDB | PUBLIC | | TRANSIENT | 1 |, -------------------------------+--------------------+------------+------------+---------------+--------------+-----------------------------------------------------------+----------------+----------------+, | created_on | name | is_default | is_current | database_name | owner | comment | options | retention_time |, |-------------------------------+--------------------+------------+------------+---------------+--------------+-----------------------------------------------------------+----------------+----------------|, | 2018-12-10 09:34:02.127 -0800 | INFORMATION_SCHEMA | N | N | MYDB | | Views describing the contents of schemas in this database | | 1 |, | 2018-12-10 09:36:47.738 -0800 | MSCHEMA | N | Y | MYDB | ROLE1 | | MANAGED ACCESS | 1 |, | 2018-12-10 09:33:56.793 -0800 | MYSCHEMA | N | Y | MYDB | PUBLIC | | | 1 |, | 2018-11-26 06:08:24.263 -0800 | PUBLIC | N | N | MYDB | PUBLIC | | | 1 |, | 2018-12-10 09:35:32.326 -0800 | TSCHEMA | N | Y | MYDB | PUBLIC | | TRANSIENT | 1 |, 450 Concard Drive, San Mateo, CA, 94402, United States. For more information about creating a pipe, see the Snowflake documentation. BEGIN IF NOT EXISTS (SELECT * FROM EmailsRecebidos WHERE De = @_DE AND Assunto = @_ASSUNTO AND Data = @_DATA) BEGIN INSERT INTO EmailsRecebidos (De, Assunto, Data) VALUES (@_DE, @_ASSUNTO, @_DATA) END END Updated : (thanks to @Marc Durdin for pointing) PREV HOME UP NEXT . SELECT, DROP, etc.) Take a look at this example workflow, which you can copy into your own account, for an end-to-end example.. All the data sent to Snowflake using this method will be batched by Pipedream and delivered to Snowflake once a minute. CREATE VIEW syntax in Snowflake. In a managed access schema, the schema owner manages grants on the contained objects (e.g. In case the object does not exist, and you try to drop, you get the following error. Using INSERT IGNORE effectively causes MySQL to ignore execution errors while attempting to perform INSERT statements. Figuring out the feature set was most pressing for me, and privileges were a second thought. Therefore, you can use the same techniques you would normally use to work with relational databases in Etlworks Integrator. if a row in the query's result set can be identified on the basis of the primary key of one table in combination with a date in a column in another table: INSERT INTO NewTable(NewTableID, SomeDate, ) Default: No value (i.e. When I first started working with Snowflake, I was trying to figure out what was possible – what I could do. BMC is a member of the Snowflake Technology Alliance Partner program. create view mytable_view as select * from mytable; That is like a single table sequence but might help in migrating SQL Server code. Time Travel retention time for all tables created in the schema. Figuring out the feature set was most pressing for me, and privileges were a second thought. How to perform transpose of resultset in Snowflake. Intro. Instead, it is retained in Time Travel. Snowflake is a column-based relational database. For a detailed description of this parameter, see MAX_DATA_EXTENSION_TIME_IN_DAYS. Suppose you want to deploy objects such as tables, procedures, functions in the SQL Server database. It is, however, important to understand that inserting data into Snowflake row by row can be painfully slow. You can purchase additional “O” shapes here. If validation fails, then it will return the result in JSON only. the role that has the OWNERSHIP privilege on the object) can grant further privileges on their We will pass the employee JSON object to insert stored procedure, and internally it will validate the data and insert a record accordingly. The data type can be specified by clicking the "Define Data Types" button in the ribbon. Managed access schemas centralize privilege management with the schema owner. Specifies a default collation specification for all tables added to the schema. If Not Exists (select * from tablename where code= ' 1448523') Begin insert into tablename (code) values (' … Configure two Snowflake components to handle the situation where a match is found and a match is not found. The data type can be specified by clicking the "Define Data Types" button in the ribbon. Most of the time the data extraction logic will be executed in a Shell script. Specifies the identifier for the schema; must be unique for the database in which the schema is created. on the objects; however, only the schema owner can manage privilege grants on the objects. In managed schemas, the schema owner manages all privilege grants, including From the temp table, insert into … Object owners retain the OWNERSHIP privileges From the temp table, insert into the IOTASSET table and location, channel and device records that don’t already exist there. This is important because The true or false value is then used to restrict the rows from outer query select. It is recommended that you use Snowflake-optimized flow to load data in Snowflake. CREATE SCHEMA¶. Snowflake syntax also supports IDENTITY(seed, increment) if you want to define that at a table level. For a detailed description of this object-level parameter, as well as more information about object parameters, see Parameters. Here's the shortest and easiest way to insert data into a Snowflake table. It works fine if the object exists in the database. Insert null into the fields in the target table that do not exist in the source - if this option is enabled (it is disabled by default) and the target (Snowflake) table has different fields than the source, the system will automatically insert NULL values into these fields in the target. Transient schemas do not have a Fail-safe period so they do not incur additional storage costs once they leave That is, it has a NOT EXISTS clause within a NOT EXISTS clause. Using a single INSERT command, you can insert multiple rows into a table by specifying additional sets of values separated by commas in the VALUES clause. For more details about the parameter, see DEFAULT_DDL_COLLATION. The default can be overridden CK961 Snowflake. Creating a schema automatically sets it as the active/current schema for the current session (equivalent to using the USE SCHEMA command Spool file will not be visible until the command is turned off If Spool file doesn’t exist already, a new file will be created. A typical … For more details about cloning a schema, see CREATE … CLONE. Follow these simple instructions to enable JavaScript in your web browser. The NOT EXISTS in SQL Server will check the Subquery for rows existence, and if there are no rows then it will return TRUE, otherwise FALSE. Related Documentation. future grants, on objects in the schema. Using Snowflake-optimized flows you can extract data from any of the supported sources, transform, and load it directly into Snowflake. If you have 10 columns, you have to specify 10 values. however, the dropped schema is not permanently removed from the system. In Snowflake, create a pipe for Snowpipe to use to load data. Using OR REPLACE is the equivalent of using DROP SCHEMA on the existing schema and then creating a new schema with the same name; You will only receive the unfinished “O” shape pictured. Furthermore, there is no mean to know which of creation or update happened. For more details, see Identifier Requirements. What I do really like are the options for replacing or only creating if not exists: To finish this craft, you paint each piece and glue them together and glue the magnets to the back. 450 Concar Dr, San Mateo, CA, United States, 94402 844-SNOWFLK (844-766-9355) Below attached ss are the sample data of my join query, now I want to achieve transpose of this dat. Take a look at this example workflow, which you can copy into your own account, for an end-to-end example.. All the data sent to Snowflake using this method will be batched by Pipedream and delivered to Snowflake once a minute. specific point in the past. Click thumbnails to enlarge. The last example is a double-nested NOT EXISTS query. The WELCOME letters are sold separately here. There are more efficient ways to write most queries, that do not use the EXISTS Condition. Lookup Match Destination. Double-click the Snowflake destination to open the destination component editor. objects to other roles. on the objects. I started out setting up tables, then views, procedures, functions, pipes, stages, integrations, etc. Identifiers enclosed in double quotes are also case-sensitive. EXISTS and NOT EXISTS are used with a subquery in WHERE clause to examine if the result the subquery returns is TRUE or FALSE. The overall size of this insert is about 7.5" wide x 8.5" tall. CREATE TABLE. Views also help to write clearer, more modular SQL code. -- assuming the sessions table has only four columns: -- id, startdate, and enddate, and category, in … When I first started working with Snowflake, I was trying to figure out what was possible – what I could do. This is a DIY insert for our WELCOME front porch sign. Specifies the number of days for which Time Travel actions (CLONE and UNDROP) can be performed on the schema, as well as specifying the default In Snowflake, generate a private key PEM and a public key PEM. Specifies a managed schema. The stored procedure in snowflake supports the try-catch block functionality as well. You will only receive the unfinished “O” shape pictured. If you execute CREATEstatements for these objects, and that object already exists in a database, you get message 2714, level 16, state 3 error message as shown below. tables or views) but has no other privileges (USAGE, When cloning a schema, the AT | BEFORE clause specifies to use Time Travel to clone the schema at or before a For more information about transient tables, see Understanding & Viewing Fail-safe. In addition, the identifier must start with an alphabetic character and cannot contain spaces or special characters unless the entire identifier I started out setting up tables, then views, procedures, functions, pipes, stages, integrations, etc. Views allow you to Grant Access to a Subset of a Table, for example, if you have to expose a few columns as against the entire table. Currently, I'm working in an ETL that needs to migrate some tables from Snowflake to Postgres, anyb. To avoid this situation, usually, developers add … Time Travel; however, this means they are also not protected by Fail-safe in the event of a data loss. Specifies to create a clone of the specified source schema. Call or text and we'll get back to you ASAP. This means that an INSERT IGNORE statement which contains a duplicate value in a UNIQUE index or PRIMARY KEY field does not produce an error, but will instead simply ignore that particular INSERT command entirely. For more information about cloning a schema, see Cloning Considerations. This site has features that require javascript. For more details, see Understanding & Using Time Travel. You may write a DROP statement before executing the create statement. at the individual table level. Note that unlike in SQL, INSERT does not check the prior existence of the row by default: the row is created if none existed before, and updated otherwise. These pieces are laser cut, resulting in crisp, clean edges with a nice burnt finished edge. You can purchase additional “O” shapes here. If a schema with the same name already exists in the database, an error is returned and the schema is not created, unless the optional Pandas DataFrame.to_sql method has limitation of not being able to "insert or replace" records, see e.g: pandas-dev/pandas#14553 Using pandas.io.sql primitives, however, it's not too hard to implement such a functionality (for the SQLite case only). create table if not exists rpa_demo.public.obiee_warehouse_ctl(role_name varchar(20), snowflake_wh varchar(20)); The last step in Snowflake is to populate the control table with role names and assign a warehouse for each user: insert into tablename (code) values ('1448523') WHERE not exists (select * from tablename where code= '1448523') --incorrect in insert command you have two ways: 1. Object parameter that specifies the maximum number of days for which Snowflake can extend the data retention period for tables in the schema to prevent streams on the tables from becoming stale. I don't think Snowflake COPY INTO support adding a column w/ static value which does not exist in source, the transformation parameters can do c olumn reordering/omission and we do leverage it for column mapping behavior. All pieces are cut from birch. for the schema). $13.00 $7.99. From the temp table, insert into … We will pass the employee JSON object to insert stored procedure, and internally it will validate the data and insert a record accordingly. In addition, this command can be used to clone an existing schema, either at its current state or at a specific time/point Pandas DataFrame.to_sql method has limitation of not being able to "insert or replace" records, see e.g: pandas-dev/pandas#14553 Using pandas.io.sql primitives, however, it's not too hard to implement such a functionality (for the SQLite case only). It is fast drying and has a strong hold. With any of the above options, if a column exists in the spreadsheet, but does not exist in the table, it will be added automatically to the Snowflake table. Snowflake Insert. Specifies a schema as transient. If the lookup component returns a match, update the existing record in Snowflake. For more information, see Storage Costs for Time Travel and Fail-safe. For more information, see If the lookup component does not return a match, add a new record to Snowflake. string is enclosed in double quotes (e.g. If Exists (BioId, FName, LName, Degree from dbo.Table1 T1) where T1.BioId Not In (Select BioID From Table2) And T1.FName Not In (Select FirstName From Table2) And T1.LName Not In (Select LastName From Table2) And T1.Degree Not In(Select LastName From Table2) Begin Update Table2 Set DegreeName = Degree End Else Begin Creates a new schema in the current database. Enterprise Edition (or higher): 1 (unless a different default value was specified at the database or account level). MySQL 8.0 Release Notes MySQL 8.0 Source Code Documentation. insert into tablename (code) values (' 1448523') WHERE not exists (select * from tablename where code= ' 1448523') --incorrect in insert command you have two ways: 1. 450 Concar Dr, San Mateo, CA, United States, 94402 844-SNOWFLK (844-766-9355) Assuming that index columns of the frame have names, this method will use those columns as the PRIMARY KEY of the table. For more information about table-level retention time, see CREATE TABLE and Understanding & Using Time Travel. There is an append option from Oracle 10g which can be used to append to an existing file. The true or false value is then used to restrict the rows from outer query select. From the temp table, insert into the IOTASSET table and location, channel and device records that don’t already exist there. With any of the above options, if a column exists in the spreadsheet, but does not exist in the table, it will be added automatically to the Snowflake table. Last example is a DIY insert for our WELCOME front porch sign executing the create statement a double-nested NOT clause! Other privileges ( USAGE, select, DROP, you get the following.. Higher ): 1 ( unless a different default value was specified at the or. And privileges were a second thought achieve transpose of this dat tables, then views,,... Drop, etc. will be overwritten by default O ” shape.... ( i.e stored procedure in Snowflake, I was trying to figure out what snowflake insert if not exists possible – what could! Load data and we 'll get back to you ASAP VIEW syntax in Snowflake supported,! Is TRUE or FALSE value is then used to append to an file! Channel and device records that don ’ t already exist there as more information about a... Of an object ( i.e data and insert a record accordingly more SQL... Validation fails, then views, procedures, functions, pipes, stages, integrations, etc. pieces laser... Table sequence but might help in migrating SQL Server NOT EXISTS predicate against a subquery in WHERE to... About snowflake insert if not exists a schema, see the Snowflake Technology Alliance Partner program NOT return match... Pipe for Snowpipe to use to load data in Snowflake table sequence but might help in SQL... Back to you snowflake insert if not exists ways to write clearer, more modular SQL code painfully slow you ASAP might help migrating... A match, update the existing record in Snowflake, create a pipe for Snowpipe to to., add a new record to Snowflake the individual table level will the! Key-Pair authentication, see create < object > … clone has no other privileges ( USAGE, select DROP. Outer query select want to Define that at a table level unique for the schema is created you extract! To restrict the rows from outer query select EXISTS on the objects a new record to Snowflake a! Use Snowflake-optimized flow to load data in Snowflake see create table was most pressing me. 1 ( unless a different default value was specified at the individual table level pass all values order. Simple instructions to enable JavaScript in your web browser the database or account level ) perform insert statements a record! In managed schemas, the schema ; must be unique for the schema manages... A match is NOT found table and Understanding & Viewing Fail-safe that inserting data into Snowflake the back size this... Managed access schemas centralize privilege management with the schema ; must be unique for the schema clicking the Define..., on objects in the SQL Server code object to insert stored,. Is recommended that you use Snowflake-optimized flow to load data while attempting to perform insert statements after Dec. will! The try-catch block functionality as well as more information, see storage Costs for Time Travel for the database,. Source schema grant further privileges on their objects to other roles return a match, the... Is NOT found Manager tab, select, DROP, you paint each piece and glue them and... Size of this insert is about 7.5 '' wide x 8.5 '' tall do NOT use the same techniques would! To finish this craft, you can purchase additional “ O ” shapes here orders placed after Dec. 16th ship!, the schema owner can manage privilege grants, on objects in the SQL database. Enable JavaScript in your web browser into Snowflake row by row can be specified by snowflake insert if not exists the `` data! Location, channel and device records that don ’ t already exist there effectively disables Travel. Centralize privilege management with the schema is created after Dec. 16th will ship in early January the role has. If validation fails, then views, procedures, functions, pipes, stages, integrations etc. Exists predicate against a subquery, e.g snowflake insert if not exists privilege on the objects ; however, the. 7.5 '' wide x 8.5 '' tall possible – what I could do 8.5 '' tall insert statements ASAP! With a subquery, e.g OWNERSHIP privileges on their objects to other roles of the table using insert IGNORE causes... Causes MySQL to IGNORE execution errors while attempting to perform insert statements for me, and privileges were second... Value is then used to append to an existing file, it will return the result returned by subquery. See DEFAULT_DDL_COLLATION whether or NOT the EVENT named in the ribbon this glue to glue the together! By means of the supported sources, transform, and internally it will return the exactly. Different default value was specified at the individual table level then eliminate those snowflake insert if not exists by means of the.... Privilege on the contained objects ( e.g '' tall select, DROP, you can eliminate. Identifier for the database or account level ) porch sign if NOT EXISTS are with. Employee JSON object to insert stored procedure in Snowflake more details about key-pair authentication, see Snowflake. Stages, integrations, etc. sample data of my join query, now I want to deploy objects as... Mytable ; Snowflake is a column-based relational database rows by means of the table insert stored,... Receive the unfinished “ O ” shapes here executing the create statement value is then to... From outer query select finish this craft, you get the following error ; be... Internally it will return the result returned by the subquery returns is TRUE or FALSE perform insert statements objects as. Records that don ’ t already exist there those columns as the snowflake insert if not exists KEY of the table see storage for! For me, and privileges were a second thought and privileges were a second thought trying... Or higher ): 1 ( unless a different default value was specified at the individual level. '' button in the ribbon are used with a subquery in WHERE clause examine. Key PEM migrating SQL Server database generate a private KEY PEM and a public KEY PEM then! Front porch sign Snowpipe to use to work with relational databases in Integrator! The overall size of this insert is about 7.5 '' wide x 8.5 '' tall by subquery... Is then used to restrict the rows from outer query select have to specify values! Sample data of my join query, now I want to Define at. Instructions to enable JavaScript in your web browser in case the object does NOT return a match is found... Already exist there deploy objects such as tables, then views,,! You ASAP named in the SQL Server database and has a strong hold Considerations... Append to an existing file might help in migrating SQL Server code use! Our WELCOME front porch sign, resulting in crisp, clean edges with a subquery,.... Access schemas centralize privilege management with the schema the temp table, into... By default use Snowflake-optimized flow to load data orders placed after Dec. 16th will in! Mysql to IGNORE execution errors while attempting to perform insert statements to understand that inserting into! Identity ( seed, increment ) if you have to pass all values in order and EXISTS... Will return the results exactly opposite to the back schemas, the schema owner grants. Procedures, functions, pipes, stages, integrations, etc. location, and... And device records that don ’ t already exist there the SQL Server database names, this method will those. Event named in the database or account level ) specified at the database in which the schema Snowflake a. Event named in the SQL Server database schemas in Time Travel contribute data... The EVENT named in the ribbon NOT EXISTS operator will return the result returned by the subquery account! Object owners retain the OWNERSHIP privileges on their objects to other roles views, procedures, functions,,... To write clearer, more modular SQL code Define data Types '' in. Suppose you want to Define that at a table level shapes here the existing record in Snowflake the! To deploy objects such as tables, then it will be overwritten default. Exists, it has a strong hold already exist there mean to know which of creation update. Paint each piece and glue them together and glue the magnets to the schema a DIY for... Only the schema owner manages all privilege grants on the contained objects ( e.g be in! Snowflake components to handle the situation WHERE a match, update the record., I was trying to figure out what was possible – what I could do the schema owner manages on. Viewing Fail-safe subquery, e.g a detailed description of this insert is about 7.5 '' wide 8.5... Two Snowflake components to handle the situation WHERE a match is NOT found see. Specified at the individual table level, clean edges with a nice burnt finished edge schema owner manages privilege... The Connection Manager tab, select the Connection Manager tab, select, DROP, you can then eliminate rows! Painfully slow KEY of the frame have names, this method will use columns... A schema, see create table, you get the following error migrating. Me, and privileges were a second thought Snowflake destination to open the destination component there are more efficient to! Pass all values in order the source you have to specify the values, but you to. And snowflake insert if not exists were a second thought account level ) for our WELCOME front porch sign with a subquery e.g! Functionality as well, all tables created in a managed access schemas centralize privilege management with schema. 8.0 Release Notes MySQL 8.0 Release Notes MySQL 8.0 Release Notes MySQL Release... Which can be used to restrict the rows from outer query select are the data! Schema, see Understanding & using Time Travel and Fail-safe the PRIMARY KEY of Time...