转自:http://www.maomao365.com/?p=7205
摘要:
下文分享两条sql求和脚本,再次求和的方法分享
/* 例: 下文已知两条sql求和脚本,现需对两张不同表的求和记录再次求和 */ ---对两条求和sql脚本求和的方法 select sum(q) from ( select sum(qty) as q from tableNameA where ... union all select sum(qty) as q from tableNameB where ... ) as table ---对多条求和sql脚本,再次求和的方法分享 select sum(q) from ( select sum(qty) as q from tableNameA where ... union all select sum(qty) as q from tableNameB where ... union all select sum(qty) as q from tableNameC where ... union all select sum(qty) as q from tableNameD where ... ... ) as table
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