Question

我已多次检查/比较SQL语句，但它仍然无效。我正在使用WorkBench 6.3和MySQL。它给了我一个错误：

1064语法错误：＆＃39; IF＆＃39;在这个位置不是有效的输入。

IF(EXISTS(SELECT * FROM RECORDS WHERE FORMID = 200002016 AND TimeUploaded > '2016-07-17 03:13:39' AND TimeUploaded < '2016-07-17 03:13:39'))
Begin
    SELECT TimeUploaded from RECORDS
End;

Answer 1

您不能在SQL语句中使用IF。您只能在存储过程或函数中使用它。

你可以像这样重写你的陈述：

SELECT TimeUploaded from RECORDS
WHERE FORMID = 200002016
  AND TimeUploaded > '2016-07-17 03:13:39'
  AND TimeUploaded < '2016-07-17 03:13:39'

IF声明在此职位上无效

1 个答案: