mysql 中 find_in_set 是判断某个字符串是否在带逗号的字符串中
例如 select t.group_id, count(group_id) tsumfrom (select group_id from xx where find_in_set(openid,'qqqwqnfocfq5il2sxb2qu0i,oarwerrr-2krah_tkljeomljhlkg,oasiouegtr5t5utlfu8-evmkn5bwq3_c') and user_uuid = 'xxxxxxxxxxxx') tgroup by group_id;
这样就能找出相匹配的数据
后者是带逗号的字符