mysql update select from another table的相關公司資訊
MySQL :: MySQL 5.1 Reference Manual :: 13.2.8 SELECT Syntax

MySQL :: MySQL 5.1 Reference Manual :: 13.2.8 SELECT Syntax

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日期:2024-09-02
SELECT can also be used to retrieve rows computed without reference to any table. For example: mysql> SELECT 1 + 1;-> 2 You are permitted to specify DUAL as a dummy table name in situations where no tables are referenced: mysql> SELECT ......看更多