Question

您好我正在从多个表中检索并显示结果，但这花费的时间太长了。

以下是我的数据库代码：

"SELECT count(distinct KGBupdate.gsxNo) as sat FROM KGBupdate 
    RIGHT JOIN ContactCenter ON KGBupdate.ackNo=ContactCenter.ackNo
    LEFT JOIN CustomerFeed ON ContactCenter.callId = CustomerFeed.callId
    WHERE date(ContactCenter.callClose) BETWEEN '".$start."' AND '".$end."'
    AND KGBupdate.gsxNo!=''
    AND ContactCenter.callStatus = 'Close'
    AND CustomerFeed.overall IN ( 1, 2 ) 
    AND ContactCenter.location='".$location[$i]."' "

加快使用索引

的方法是什么？

提前致谢。

Answer 1

试试这个：

SELECT count(distinct KGBupdate.gsxNo) as sat FROM KGBupdate 
    RIGHT JOIN ContactCenter ON KGBupdate.ackNo=ContactCenter.ackNo and ContactCenter.callStatus = 'Close' and ContactCenter.location='".$location[$i]."' "
    LEFT JOIN CustomerFeed ON ContactCenter.callId = CustomerFeed.callId and CustomerFeed.overall IN ( 1, 2 ) 
    WHERE date(ContactCenter.callClose) BETWEEN '".$start."' AND '".$end."'
    AND KGBupdate.gsxNo!=''

从多个表中检索花费的时间太长

1 个答案: