Question

我的表格中有一列：tbl_customers，可将客户记录区分为LEAD或CUS。

该列只是：recordtype，其中是char（1）。我用C或L填充它显然C =客户，而L =铅。

我想在创建记录的那天运行一个分组的查询，因此我有一个名为datecreated的列。

这是我对分组感到困惑的地方。

我想在特定日期或日期范围内显示结果（在一个查询中）COUNT个客户和COUNT个潜在客户。我成功只提取recordtype：C或recordtype：L的数字，但需要2个查询。

这是我到目前为止所拥有的：

  SELECT COUNT(customerid) AS `count`, datecreated 
    FROM `tbl_customers` 
   WHERE `datecreated` BETWEEN '$startdate."' AND '".$enddate."' 
     AND `recordtype` = 'C' 
GROUP BY `datecreated` ASC

正如预期的那样，它显示2列（客户记录的数量和datecreated）。

有没有办法在一个查询中同时显示，同时仍按datecreated列进行分组？

Answer 1

您可以使用多个列进行分组。

SELECT COUNT(customerid) AS `count`, datecreated, `recordtype`
FROM `tbl_customers` 
WHERE `datecreated` BETWEEN '$startdate."' AND '".$enddate."' 
GROUP BY `datecreated` ASC, `recordtype`

Answer 2

SELECT COUNT(customerid) AS `count`,
    datecreated,
    SUM(`recordtype` = 'C') AS CountOfC,
    SUM(`recordtype` = 'L') AS CountOfL
FROM `tbl_customers` 
WHERE `datecreated` BETWEEN '$startdate."' AND '".$enddate."' 
GROUP BY `datecreated` ASC

请参阅Is it possible to count two columns in the same query

Answer 3

有两种解决方案，具体取决于您是希望在单独的行中还是在单独的列中进行两次计数。

在不同的行中：

SELECT datecreated, recordtype, COUNT(*)
FROM tbl_customers
WHERE datecreated BETWEEN '...' AND '...'
GROUP BY datecreated, recordtype

在单独的列中（这称为转动表）

SELECT datecreated,
       SUM(recordtype = 'C') AS count_customers,
       SUM(recordtype = 'L') AS count_leads
FROM tbl_customers
WHERE datecreated BETWEEN '...' AND '...'
GROUP BY datecreated

Answer 4

使用：

$query = sprintf("SELECT COUNT(c.customerid) AS count,
                         c.datecreated,
                         SUM(CASE WHEN c.recordtype = 'C' THEN 1 ELSE 0 END) AS CountOfC,
                         SUM(CASE WHEN c.recordtype = 'L' THEN 1 ELSE 0 END) AS CountOfL
                    FROM tbl_customers c 
                   WHERE c.datecreated BETWEEN STR_TO_DATE('%s', '%Y-%m-%d %H:%i') 
                                           AND STR_TO_DATE('%s', '%Y-%m-%d %H:%i')
                GROUP BY c.datecreated",
                  $startdate, $enddate);

您需要填写日期格式 - 有关详细信息，请参阅STR_TO_DATE。

PHP MySQL Group问题

4 个答案: