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

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

瀏覽:430
日期:2025-04-23
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