mysql两条sql合并查询总数 

select IFNULL(c.nodeCount,0) + IFNULL(c.phyCount,0) as totalCount
 from (
select count(*) nodeCount, (select count(*) from rn_base a join rn_ext_systeminfo b
            on a.id = b.nodeId where (a.subType = 'VIRTUAL' or a.subType = 'PHYSICAL')) phyCount  from rn_base a join rn_ext_vir_instance b 
            on a.id = b.nodeId where a.subType = 'VIR_INSTANCE' ) c

 

posted @ 2018-09-14 17:32  hao踏雪无痕  阅读(2252)  评论(0)  编辑  收藏  举报