45.筆記 MySQL學習——FROM子句裏的子查詢

45.筆記 MySQL學習——FROM子句裏的子查詢mysql 子查詢能夠用在FROM子句裏，已生成某些值。sql 例如：學習 mysql> select * from (select 1,2 ) as t1 innerjoin (select 3,4) as t2;spa +---+---+---+---+select | 1 | 2 | 3 | 4 |查詢 +---+---+---+---+j

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