mysql - SQL中如何对结果进行分组？

Question

我正在从 1 个表进行查询，并使用 UNION 和 2 个具有不同条件的 select。

SELECT *
FROM (
      SELECT DATE(MAX(RECEIVED)) DT,
             INFO CASH_INFO,
             SUM(IF(TRANS_TYPE = 714, AMOUNT, 0)) TOTAL_CASH,
             '' AS OTHER_INFO,
             0 AS TOTAL_CHEQUE,
             0 AS TOTAL_CREDIT
      FROM PAYMENT
      WHERE LOGIN = 'opensys' 
        AND SOURCE_OF_TRX = '245T2' 
        AND RET_CODE_ID IN (0, 106, 110) 
        AND RECEIVED >= DATE_SUB('2015-09-23 16:30:42', INTERVAL 7 DAY) 
        AND TRANS_TYPE = 714
      GROUP BY INFO
      UNION
      SELECT DATE(MAX(RECEIVED)) DT,
             '' AS CASH_INFO,
             0 AS TOTAL_CASH,    
             INFO OTHER_INFO,
             SUM(IF(TRANS_TYPE = 715, AMOUNT, 0)), -- TOTAL_CHEQUE,
             SUM(IF(TRANS_TYPE = 716, AMOUNT, 0)) -- TOTAL_CREDIT
      FROM PAYMENT
      WHERE LOGIN = 'opensys' 
        AND SOURCE_OF_TRX = '245T2' 
        AND RET_CODE_ID IN (0, 106, 110) 
        AND RECEIVED >= DATE_SUB('2015-09-23 16:30:42', INTERVAL 7 DAY) 
        AND TRANS_TYPE in (715, 716)
      GROUP BY INFO
     ) A
GROUP BY CASH_INFO, OTHER_INFO
ORDER BY DT

结果并不准确，因为该记录没有对相同日期的记录进行分组。

我想要实现的是将结果与相同日期分组。

P/S:最后 2 条记录将始终返回相同的日期。这意味着 2015 年 9 月 23 日将有 2 个日期。

抱歉，我无法发布图片，因此我必须将其链接到我的 Google 云端硬盘。 image

Answer 1

不幸的是，MySQL 允许您发布的查询，但在几乎所有 RDMS SQL 引擎中都会失败，因为您选择带有 * 的项目，而不受聚合查询中的 GROUP BY 子句的限制。如果您设置了 sql_mode to ANSI此查询将给出 GROUP BY 错误。

考虑聚合查询的更正 ANSI 语法，仅选择要聚合的字段，然后按日期、cash_info 和 other_info 字段进行分组。

SELECT DT, 
       CASH_INFO, 
       Sum(TOTAL_CASH), 
       OTHER_INFO, 
       Sum(TOTAL_CHEQUE), 
       Sum(TOTAL_CREDIT)
FROM (
      SELECT DATE(MAX(RECEIVED)) DT,
             INFO CASH_INFO,
             SUM(IF(TRANS_TYPE = 714, AMOUNT, 0)) TOTAL_CASH,
             '' AS OTHER_INFO,
             0 AS TOTAL_CHEQUE,
             0 AS TOTAL_CREDIT
      FROM PAYMENT
      WHERE LOGIN = 'opensys' 
        AND SOURCE_OF_TRX = '245T2' 
        AND RET_CODE_ID IN (0, 106, 110) 
        AND RECEIVED >= DATE_SUB('2015-09-23 16:30:42', INTERVAL 7 DAY) 
        AND TRANS_TYPE = 714
      GROUP BY INFO
      UNION
      SELECT DATE(MAX(RECEIVED)) DT,
             '' AS CASH_INFO,
             0 AS TOTAL_CASH,    
             INFO OTHER_INFO,
             SUM(IF(TRANS_TYPE = 715, AMOUNT, 0)), -- TOTAL_CHEQUE,
             SUM(IF(TRANS_TYPE = 716, AMOUNT, 0)) -- TOTAL_CREDIT
      FROM PAYMENT
      WHERE LOGIN = 'opensys' 
        AND SOURCE_OF_TRX = '245T2' 
        AND RET_CODE_ID IN (0, 106, 110) 
        AND RECEIVED >= DATE_SUB('2015-09-23 16:30:42', INTERVAL 7 DAY) 
        AND TRANS_TYPE in (715, 716)
      GROUP BY INFO
     ) A
GROUP BY DT, CASH_INFO, OTHER_INFO;