使用一条sql语句查询多表的总数

SELECT sum(列名1) 列名1,sum(列名2) 列名2,sum(列名3) 列名3 FROM (
 SELECT count(*) 列名1,0 列名2,0 列名3 FROM 表1 
--         WHERE plan_uid = 123456
 UNION ALL
 SELECT 0 列名1,count(*) 列名2,0 列名3 FROM 表2
-- WHERE other_uid = 123456 
 UNION ALL 
 SELECT 0 列名1,0 列名2,count(*) 列名3 FROM 表3 
-- WHERE uid = 123456 AND status = 1
 ) t;

以上sql语句即可实现，同时查询互相不关联的几个表的每个表的数据总数