MYSQL LEFT JOIN结果与表?
答
你应该尝试:
Select *
From(
SELECT *
FROM myTableOne
GROUP BY myCol1
) firstTable
LEFT JOIN myTableTwo secondTable ON
firstTable.idColumn = secondTable.idColumn
哪里myTableOne是由组选择和myTableTwo是要留下参加关于
是的,你可以:)表 – NikNik