【代碼筆記】【MySQL】 合併兩個結果集

合併兩個結果集 並集 帶group byweb SELECT field1,field2，field3 --① FROM ( SELECT a.field1,b.field2,SUM(c.field3) AS field3 --② FROM table1 AS a LEFT OUTER JOIN table2 AS b ON a.id = b.aid LEFT OUTER JOIN table3

>>阅读原文<<