mysql 4.x - > 5.x升級相關問題

Question

即時升級mysql 4.x - > 5.x.

並在我的PHP源代碼中有以下的mysql synxtax。

$pt_sql = "select * from orderlist 
      where condition!='delete' 
      and left(date,10)='$nday' 
      group by id "; 

如何將以上mysql語法更改爲mysql 5.x語法？

如果有人幫我非常感謝！

在此先感謝

Answer 1

CONDITION是在MySQL 5.0（it was not in 4.1）一reserved word所以它必須在反引號在查詢：

select * from orderlist 
where `condition` != 'delete' 
and left(date,10)='$nday' 
group by id 

您可能還需要考慮存儲列date作爲date或將其存儲爲datetime類型並使用DATE函數。