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USING .. ON

适用于 ✅ 开源版   ✅ 专业版   ✅ 企业版

USING .. ON 子句指定 MERGE 语句 的 SOURCE 表和与 TARGET 表的 JOIN 条件，其余子句将基于此条件应用。 默认情况下，SOURCE 表 RIGHT JOIN 到 TARGET 表，这意味着 SOURCE 表中的每一行都会执行操作。

某些方言也支持 BY SOURCE 子句，该子句允许使用 LEFT JOIN 或 FULL JOIN 语义，从而允许对 TARGET 表中没有匹配 SOURCE 行的行执行操作。

方言支持

此示例使用 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)))
    .whenMatchedThenUpdate().set(BOOK_TO_BOOK_STORE.STOCK, BOOK_TO_BOOK_STORE_STAGING.STOCK)

翻译成以下特定方言的表达式

Databricks, Postgres, Snowflake, Teradata, 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 MATCHED THEN UPDATE SET
  STOCK = BOOK_TO_BOOK_STORE_STAGING.STOCK

DB2, Derby, Exasol, Firebird, H2, HSQLDB, Hana, Sybase

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 MATCHED THEN UPDATE SET
  BOOK_TO_BOOK_STORE.STOCK = BOOK_TO_BOOK_STORE_STAGING.STOCK

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 MATCHED THEN UPDATE SET
  BOOK_TO_BOOK_STORE.STOCK = BOOK_TO_BOOK_STORE_STAGING.STOCK

Redshift

UPDATE BOOK_TO_BOOK_STORE
SET
  STOCK = CASE
    WHEN 1 = 1 THEN BOOK_TO_BOOK_STORE_STAGING.STOCK
    ELSE BOOK_TO_BOOK_STORE.STOCK
  END
FROM BOOK_TO_BOOK_STORE_STAGING
WHERE (
  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
)

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 MATCHED THEN UPDATE SET
  BOOK_TO_BOOK_STORE.STOCK = BOOK_TO_BOOK_STORE_STAGING.STOCK;

ASE, Access, Aurora MySQL, Aurora Postgres, BigQuery, ClickHouse, CockroachDB, DuckDB, Informix, MariaDB, MemSQL, MySQL, SQLDataWarehouse, SQLite, Trino, YugabyteDB

/* UNSUPPORTED */
使用 jOOQ 3.21 生成。早期 jOOQ 版本的支持可能有所不同。 在我们的网站上翻译您自己的 SQL

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