SQL 查询报表内连接答案

【问题标题】：SQL Query Report Inner JoinSQL 查询报表内连接
【发布时间】：2020-01-29 06:28:51
【问题描述】：

我想按日期获取报告，我想 INNERJOIN 购买的商品和商品库存，但我似乎弄错了，这是我的代码：

$query=mysqli_query($con,"select month(tblpurchase.PostingDate_p) as mnth,year(tblpurchase.PostingDate_p)
 as yearr,day(tblpurchase.PostingDate_p) as date,tblpurchase.Itemname as itmname, tblpurchase.Quantity as
 pquantity, tblpurchase.Damaged as dmgq, from tblpurchase  INNER JOIN tblitem ON tblpurchase.ItemId = 
tblitem.id where date(tblpurchase.PostingDate_p) between '$fdate' and '$tdate'");

这是我的桌子

tbitem

id|ItemName|beginv|stock|PostingDate

购买

id|Itemname|ItemId|Quantity|Damaged|LatestInv|PostingDate_p|UpdatingTime

【问题讨论】：

始终向您的代码提供错误消息，以便其他人可以帮助您进行故障排除。至于这篇文章，我可以看到你在FROM 之前有一个,，这在语法上是错误的。
对不起。问题是我想获得所选商品的库存，我已经解决了问题，但它没有显示库存

标签： mysql sql inner-join

【解决方案1】：

运行这个，最后一个返回的clum后面不需要逗号

$query=mysqli_query($con,"select month(tblpurchase.PostingDate_p) as mnth,year(tblpurchase.PostingDate_p)
 as yearr,day(tblpurchase.PostingDate_p) as date,tblpurchase.Itemname as itmname, tblpurchase.Quantity as
 pquantity, tblpurchase.Damaged as dmgq from tblpurchase  INNER JOIN tblitem ON tblpurchase.ItemId = 
tblitem.id where date(tblpurchase.PostingDate_p) between '$fdate' and '$tdate'");

【讨论】：

请注意，正如所写，您的 where 构造不能使用索引。（并且可以注射）