WHEN NOT MATCHED BY SOURCE

Many of these dialects also support a BY TARGET clause for symmetry reasons, and possibly, to make the statement's intent more clear. The BY TARGET clause has no logical effect on the WHEN NOT MATCHED THEN INSERT clause.

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)))
    .whenNotMatchedBySource().thenDelete()

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 BY SOURCE THEN DELETE

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 BY SOURCE THEN DELETE;

/* UNSUPPORTED */

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