mysql5.6兩表關聯的執行順序

原創 shuoyuechenxing 2020-07-01 14:02

mysql5.6兩表關聯的執行順序：，
1.當兩表都爲空表的時候，from後面先跟誰誰先被執行；
在這裏插入圖片描述
2.如果兩張表的記錄條數都是1，from後面跟誰誰先執行；
在這裏插入圖片描述
3.如果兩張表的記錄條數不一致，小表先執行；
在這裏插入圖片描述

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