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MySQL :: MySQL 5.5 Reference Manual :: 13.2.11 UPDATE Syntax
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日期：2025-04-25
Update column in a table whose values are not found in another table. UPDATE TABLE_1 LEFT JOIN TABLE_2 ON TABLE_1.COLUMN_1= TABLE_2.COLUMN_2 SET TABLE_1.COLUMN = EXPR WHERE TABLE_2.COLUMN2 IS NULL An outerjoin is performed ......看更多
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