两个表中查询出来的数据用逗号分开,
查询一个值,在这个表中存不存在
select b.id from T_HF_ALARM_USERS b,
(select wm_concat(U_IDS) A from T_HF_ALARM_USERGROUP ) a
where instr(a.A, b.id) > 0 and b.”ID”=’8’
select b.B from tableB b,
(select wm_concat(A) A from tableA ) a
where instr(a.A, b.B) > 0