Question

我正在创建该查询。在哪里设置“ SELECT”？

 (SELECT COUNT(B.USER_ID) 
    FROM USER_LIST B, USER_INFO A  
    WHERE B.PHONE_NUM not in ('11100000') 
    AND B.USER_ID = A.USER_ID) USERCOUNT, 

    (SELECT COUNT(B.USER_ID) FROM USER_LIST B, USER_INFO A  
    AND B.PHONE_NUM in ('11100000')
     AND B.USER_ID = A.USER_ID) BLACKUSERCOUNT

Oracle / PLSQL： ORA-00933 错误消息。

但是，如果我一一运行，那是可行的。如何合并该查询？

Answer 1

您可以使用以下命令包装语句：

以

开头

  select

最后

 from dual

Answer 2

另一种选择是：它将显示两行数据，每一行的第一列（其标签为what）都将显示其代表的内容。

SELECT 'usercount' what, COUNT (b.user_id) cnt
  FROM user_list b JOIN user_info a ON a.user_id = b.user_id
 WHERE b.phone_num NOT IN ('11100000')
UNION ALL
SELECT 'blackusercount' what, COUNT (b.user_id)
  FROM user_list b JOIN user_info a ON a.user_id = b.user_id
 WHERE b.phone_num IN ('11100000');

或者，也许更好，通过只查询一次表来节省一些CPU

SELECT SUM (CASE WHEN b.phone_num NOT IN ('1110000') THEN 1 ELSE 0 END) usercount,
       SUM (CASE WHEN b.phone_num     IN ('1110000') THEN 1 ELSE 0 END) blackusercount
  FROM user_list b JOIN user_info a ON a.user_id = b.user_id;

Oracle / PLSQL：SELECT语句上的ORA-00933错误

2 个答案: