sql-server-2008 - 如何使用另一个表 SQL Server Management Studio 2008 更新表的行

Question

如果列相同，我想test1用另一个表中的列值更新表中的列值。test2provisionid, categoryid, differencetype

有什么建议么？

Answer 1

UPDATE t1
    SET SomeColumn = t2.SomeColumn
    FROM test1 t1
        INNER JOIN test2 t2
            ON t1.provisionid = t2.provisionid
                AND t1.categoryid = t2.categoryid
                AND t1.differencetype = t2.differencetype;