IFNULL函数在MySQL查询中不起作用
我要总帐。但是IFNULL函数在MySQL查询中不起作用,mysql,ifnull,Mysql,Ifnull,我要总帐。但是IFNULL函数不工作 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 不能将
IFNULL
函数不工作
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
不能将
别名
用作分组依据
参数。请尝试下面的查询:
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