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我想要 Grand Total 的接线员。但IFNULL功能不起作用。

SELECT 
      IFNULL(op.operator_name, "Grand Total") AS operator, 
      SUM(re.amount) AS amount 
FROM mobile_db.recharge re 
INNER JOIN mobile_db.operator op 
ON re.operator_id = op.operator_id
GROUP BY operator WITH ROLLUP
4

1 回答 1

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您不能ALIAS用作GROUP BY参数。在下面尝试我的查询:

SELECT 
     IFNULL(op.operator_name, "Grand Total") AS operator, 
     sum(re.amount) AS amount 
FROM mobile_db.recharge re 
INNER JOIN mobile_db.operator op ON re.operator_id = op.operator_id
GROUP BY IFNULL(op.operator_name, "Grand Total") WITH ROLLUP
于 2015-02-17T06:31:53.770 回答