如何应用日期范围过滤器来获得总和

Question

我刚接触到php＆amp; MySQL的。我有两个专栏，团队和mysql数据库中的日期。 我尝试使用代码来查找基于日期过滤器的总数。（即2013年8月6日）

$result = mysql_query("SELECT Date, SUM(issuedwt) AS IssuedTotal, SUM(receiptwt) AS ReceiptTotal, SUM(workloss) AS Balance FROM `worksheet` GROUP BY Date")
or die(mysql_error());

我得到了总数，但我也得到了2013年8月10日的总数。我不需要那个。有什么建议吗？

Answer 1

$filter = "2013-08-10";

$sql = "SELECT Date, 
                SUM(issuedwt)  AS IssuedTotal, 
                SUM(receiptwt) AS ReceiptTotal, 
                SUM(workloss)  AS Balance 
       FROM `worksheet` 
       WHERE Date = '".$filter."' 
       GROUP BY Date";

$result = mysql_query($sql) or die(mysql_error());

Answer 2

忽略date子句中的select字段。试试这个：

$result = mysql_query("SELECT SUM(issuedwt) AS IssuedTotal, SUM(receiptwt) AS ReceiptTotal, SUM(workloss) AS Balance FROM `worksheet` GROUP BY Date")
or die(mysql_error());