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MySQL Subqueries Tutorial | eHow - eHow | How to - Discover the expert in you!
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日期:2025-04-24
The Syntax The basic syntax for a subquery is this: SELECT * FROM table WHERE columna = (SELECT columnb FROM table2) GO Subqueries must be a SELECT, INSERT, UPDATE, DELETE, SET or DO statement, and you cannot modify a table and select ......看更多