Mysql 如何优化此sql查询

这个查询需要3秒钟，我想让它运行得更快。 请提供任何建议

SELECT Concat(e.estimate1, '-', e.estimate2) AS estimateid,
       e.estimatetype,
       e.createdby,
       e.estimateid AS estID,
       e.`layoutnumber`,
       sd.specno,
       sd.samplenumber,
       sd.numberon,
       c.customerid,
       c.custprosname,
       c.`custtype`,
       (SELECT Count(*)
        FROM  (SELECT e.estimate1
               FROM   `simpleestimatedetails` sd,
                      estimatemaster e,
                      `vcustomer_prospect` c
               WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
                      AND ( e.estimate1 LIKE '%1%' )
                      AND ( sd.`simpleestid` = e.estimateid )) AS counter) AS
       counter
FROM   `simpleestimatedetails` sd,
       estimatemaster e,
       `vcustomer_prospect` c
WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
       AND ( e.estimate1 LIKE '%1%' )
       AND ( sd.`simpleestid` = e.estimateid );

---

在SQL查询中，“计数器”正在调用多个表的冗余联接

SELECT Concat(e.estimate1, '-', e.estimate2) AS estimateid,
       e.estimatetype,
       e.createdby,
       e.estimateid AS estID,
       e.`layoutnumber`,
       sd.specno,
       sd.samplenumber,
       sd.numberon,
       c.customerid,
       c.custprosname,
       c.`custtype`,
       (SELECT Count(*)
        FROM  (SELECT e.estimate1
               FROM   `simpleestimatedetails` sd,
                      estimatemaster e,
                      `vcustomer_prospect` c
               WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
                      AND ( e.estimate1 LIKE '%1%' )
                      AND ( sd.`simpleestid` = e.estimateid )) AS counter) AS
       counter
FROM   `simpleestimatedetails` sd,
       estimatemaster e,
       `vcustomer_prospect` c
WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
       AND ( e.estimate1 LIKE '%1%' )
       AND ( sd.`simpleestid` = e.estimateid );

请忽略计数器列，并尝试获取值作为上一次SQl查询返回的总行数

SELECT Concat(e.estimate1, '-', e.estimate2) AS estimateid,
       e.estimatetype,
       e.createdby,
       e.estimateid AS estID,
       e.`layoutnumber`,
       sd.specno,
       sd.samplenumber,
       sd.numberon,
       c.customerid,
       c.custprosname,
       c.`custtype`,
       (SELECT Count(*)
        FROM  (SELECT e.estimate1
               FROM   `simpleestimatedetails` sd,
                      estimatemaster e,
                      `vcustomer_prospect` c
               WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
                      AND ( e.estimate1 LIKE '%1%' )
                      AND ( sd.`simpleestid` = e.estimateid )) AS counter) AS
       counter
FROM   `simpleestimatedetails` sd,
       estimatemaster e,
       `vcustomer_prospect` c
WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
       AND ( e.estimate1 LIKE '%1%' )
       AND ( sd.`simpleestid` = e.estimateid );

希望这将提高查询性能。通过下面的查询，您将得到所需的结果

SELECT Concat(e.estimate1, '-', e.estimate2) AS estimateid,
       e.estimatetype,
       e.createdby,
       e.estimateid AS estID,
       e.`layoutnumber`,
       sd.specno,
       sd.samplenumber,
       sd.numberon,
       c.customerid,
       c.custprosname,
       c.`custtype`,
       (SELECT Count(*)
        FROM  (SELECT e.estimate1
               FROM   `simpleestimatedetails` sd,
                      estimatemaster e,
                      `vcustomer_prospect` c
               WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
                      AND ( e.estimate1 LIKE '%1%' )
                      AND ( sd.`simpleestid` = e.estimateid )) AS counter) AS
       counter
FROM   `simpleestimatedetails` sd,
       estimatemaster e,
       `vcustomer_prospect` c
WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
       AND ( e.estimate1 LIKE '%1%' )
       AND ( sd.`simpleestid` = e.estimateid );

select concat(e.estimate1,'-',e.estimate2) as estimateid,
         e.estimatetype,
         e.CreatedBy,
         e.EstimateID as estID,
         e.`LayoutNumber`,
          sd.specNo,
          sd.SampleNumber,
          sd.NumberON, c.customerid,
          c.CustProsName,
          c.`CustType`
             from `simpleestimatedetails` sd,
              estimatemaster e,
              `vcustomer_prospect` c
             where c.customerid in (e.customernumber,e.ProspectNumber)
             and (e.estimate1 like '%1%')
              and (sd.`SimpleEstID`=e.estimateid);

注意：行的总数将给出计数器的值

SELECT Concat(e.estimate1, '-', e.estimate2) AS estimateid,
       e.estimatetype,
       e.createdby,
       e.estimateid AS estID,
       e.`layoutnumber`,
       sd.specno,
       sd.samplenumber,
       sd.numberon,
       c.customerid,
       c.custprosname,
       c.`custtype`,
       (SELECT Count(*)
        FROM  (SELECT e.estimate1
               FROM   `simpleestimatedetails` sd,
                      estimatemaster e,
                      `vcustomer_prospect` c
               WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
                      AND ( e.estimate1 LIKE '%1%' )
                      AND ( sd.`simpleestid` = e.estimateid )) AS counter) AS
       counter
FROM   `simpleestimatedetails` sd,
       estimatemaster e,
       `vcustomer_prospect` c
WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
       AND ( e.estimate1 LIKE '%1%' )
       AND ( sd.`simpleestid` = e.estimateid );

SELECT Concat(e.estimate1, '-', e.estimate2) AS estimateid,
       e.estimatetype,
       e.createdby,
       e.estimateid AS estID,
       e.`layoutnumber`,
       sd.specno,
       sd.samplenumber,
       sd.numberon,
       c.customerid,
       c.custprosname,
       c.`custtype`
  FROM estimatemaster e Inner Join
       `vcustomer_prospect` c
    On c.customerid IN ( e.customernumber, e.prospectnumber )
 Inner Join `simpleestimatedetails` sd
    On sd.`simpleestid` = e.estimateid
 WHERE e.estimate1 LIKE '%1%'

---

注意：我已删除计数器列。如果您是从某个前端执行此操作，则可以通过检查

RowsAffected

或

RowCount

或

RecordsCount

或查询组件的类似属性来获取计数器值。

用于分析您的查询。对不起，我没有该访问权限。我想上面的查询不需要任何描述。我们只是必须使用不同的方法Xcuse me，您被指派优化查询，但无法运行EXPLAIN？有人希望你怎么做？难道你没有一台开发机器，在那里你（有权利）可以测试重写、索引和分析吗？是的，我就是这样。我一拿到它就把它放在这里。但在那之前，你不能在没有先看到解释输出的情况下给我提出任何建议。我不会得到反ID。这是一个重要的列。请提供一些建议。按照建议，在处理从SQL查询获取的值时，计数器值可以放在最后。它可以像计算获取的行数一样简单。如何使用rowcount获取计数器？因为您的

计数器

查询具有与主查询相同的

from

和

where

子句。因此，您可以删除该列并使用组件的属性作为

计数器

。请告诉我如何使用组件的属性。第一次听说它您使用的前端是什么？另外，请在你的帖子中显示你的查询代码，请留下我的答案。如果你有Mysql作为前端，就意味着你可以访问一些查询你的Mysql数据库的工具。那么根据ypercube在你的帖子中的评论，为什么你不能解释一下这个命令呢？

SELECT Concat(e.estimate1, '-', e.estimate2) AS estimateid,
       e.estimatetype,
       e.createdby,
       e.estimateid AS estID,
       e.`layoutnumber`,
       sd.specno,
       sd.samplenumber,
       sd.numberon,
       c.customerid,
       c.custprosname,
       c.`custtype`,
       (SELECT Count(*)
        FROM  (SELECT e.estimate1
               FROM   `simpleestimatedetails` sd,
                      estimatemaster e,
                      `vcustomer_prospect` c
               WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
                      AND ( e.estimate1 LIKE '%1%' )
                      AND ( sd.`simpleestid` = e.estimateid )) AS counter) AS
       counter
FROM   `simpleestimatedetails` sd,
       estimatemaster e,
       `vcustomer_prospect` c
WHERE  c.customerid IN ( e.customernumber, e.prospectnumber )
       AND ( e.estimate1 LIKE '%1%' )
       AND ( sd.`simpleestid` = e.estimateid );