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WHEN NOT MATCHED AND ..
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
Various dialects support the standard SQL syntax for having multiple WHEN
clauses, where an additional predicates are supplied with each clause.
This works in a similar way to a CASE expression, where the first matching CASE
gets applied.
If the syntax isn't supported in a dialect, it can be emulated by collapsing the various WHEN
clauses into a single one that uses a CASE expression to cover all the conditions and results.
Dialect support
This example using jOOQ:
mergeInto(BOOK_TO_BOOK_STORE) .using(BOOK_TO_BOOK_STORE_STAGING) .on(BOOK_TO_BOOK_STORE.BOOK_ID.eq(BOOK_TO_BOOK_STORE_STAGING.BOOK_ID) .and(BOOK_TO_BOOK_STORE.NAME.eq(BOOK_TO_BOOK_STORE_STAGING.NAME))) .whenNotMatchedAnd(BOOK_TO_BOOK_STORE_STAGING.STOCK.gt(100)) .thenInsert( BOOK_TO_BOOK_STORE.BOOK_ID, BOOK_TO_BOOK_STORE.NAME, BOOK_TO_BOOK_STORE.STOCK ) .values( BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, BOOK_TO_BOOK_STORE_STAGING.NAME, BOOK_TO_BOOK_STORE_STAGING.STOCK )
Translates to the following dialect specific expressions:
DB2, Databricks, Derby, Firebird, H2, HSQLDB, Hana, Informix, Postgres, Snowflake, Sybase, Vertica
MERGE INTO BOOK_TO_BOOK_STORE USING BOOK_TO_BOOK_STORE_STAGING ON ( BOOK_TO_BOOK_STORE.BOOK_ID = BOOK_TO_BOOK_STORE_STAGING.BOOK_ID AND BOOK_TO_BOOK_STORE.NAME = BOOK_TO_BOOK_STORE_STAGING.NAME ) WHEN NOT MATCHED AND BOOK_TO_BOOK_STORE_STAGING.STOCK > 100 THEN INSERT (BOOK_ID, NAME, STOCK) VALUES ( BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, BOOK_TO_BOOK_STORE_STAGING.NAME, BOOK_TO_BOOK_STORE_STAGING.STOCK )
Exasol, Teradata
MERGE INTO BOOK_TO_BOOK_STORE USING BOOK_TO_BOOK_STORE_STAGING ON ( BOOK_TO_BOOK_STORE.BOOK_ID = BOOK_TO_BOOK_STORE_STAGING.BOOK_ID AND BOOK_TO_BOOK_STORE.NAME = BOOK_TO_BOOK_STORE_STAGING.NAME ) WHEN NOT MATCHED THEN INSERT (BOOK_ID, NAME, STOCK) VALUES ( BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, BOOK_TO_BOOK_STORE_STAGING.NAME, BOOK_TO_BOOK_STORE_STAGING.STOCK ) WHERE BOOK_TO_BOOK_STORE_STAGING.STOCK > 100
Oracle
MERGE INTO BOOK_TO_BOOK_STORE USING BOOK_TO_BOOK_STORE_STAGING ON (( BOOK_TO_BOOK_STORE.BOOK_ID = BOOK_TO_BOOK_STORE_STAGING.BOOK_ID AND BOOK_TO_BOOK_STORE.NAME = BOOK_TO_BOOK_STORE_STAGING.NAME )) WHEN NOT MATCHED THEN INSERT (BOOK_ID, NAME, STOCK) VALUES ( BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, BOOK_TO_BOOK_STORE_STAGING.NAME, BOOK_TO_BOOK_STORE_STAGING.STOCK ) WHERE BOOK_TO_BOOK_STORE_STAGING.STOCK > 100
SQLServer
MERGE INTO BOOK_TO_BOOK_STORE USING BOOK_TO_BOOK_STORE_STAGING ON ( BOOK_TO_BOOK_STORE.BOOK_ID = BOOK_TO_BOOK_STORE_STAGING.BOOK_ID AND BOOK_TO_BOOK_STORE.NAME = BOOK_TO_BOOK_STORE_STAGING.NAME ) WHEN NOT MATCHED AND BOOK_TO_BOOK_STORE_STAGING.STOCK > 100 THEN INSERT (BOOK_ID, NAME, STOCK) VALUES ( BOOK_TO_BOOK_STORE_STAGING.BOOK_ID, BOOK_TO_BOOK_STORE_STAGING.NAME, BOOK_TO_BOOK_STORE_STAGING.STOCK );
ASE, Access, Aurora MySQL, Aurora Postgres, BigQuery, ClickHouse, CockroachDB, DuckDB, MariaDB, MemSQL, MySQL, Redshift, SQLDataWarehouse, SQLite, Trino, YugabyteDB
/* UNSUPPORTED */
Generated with jOOQ 3.21. Support in older jOOQ versions may differ. Translate your own SQL on our website
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