标签：ifnull bsp cal font mysq 原因 UNC sel 错误代码
错误代码：
SELECT SNUM,AVG(ISNULL(SCORE,0)) FROM SC WHERE SNUM IN ( select SNUM from sc where score < 90 group by SNUM having count(*)>2) GROUP BY SNUM
错误提示：
1582 - Incorrect parameter count in the call to native function ‘ISNULL‘,
错误原因：
mysql识别不了ISNULL，支持IFNULL，
修改后代码：
SELECT SNUM,AVG(IFNULL(SCORE,0)) FROM SC WHERE SNUM IN ( select SNUM from sc where score < 90 group by SNUM having count(*)>2) GROUP BY SNUM
运行无误！
1582 - Incorrect parameter count in the call to native function 'ISNULL',
标签：ifnull bsp cal font mysq 原因 UNC sel 错误代码
原文地址：https://www.cnblogs.com/laochoubiji/p/9350241.html
