Question

我正在尝试做一些非常简单的事情，但是我在做错事情上是空白。我有一个查询，该查询返回一个姓氏，一个ID以及该姓氏查看ID的次数。我只需要一行结果来计算查看了多少个不同的ID。

很抱歉，如果您之前曾询问过此问题，我曾尝试查找，但可能没有搜索正确的术语。

Select a.employeeLastName, COUNT(Distinct d.id) as counter, COUNT(a.employeeId) as avCount
From tblEmployees a
         LEFT JOIN tblEvents b on b.employeeId = a.employeeId
         LEFT JOIN tblEventsType c on c.typeId = b.typeId
         LEFT JOIN assets d on d.id = b.assetId
WHERE a.employeeId = 138050
  AND d.type = 'Article'
  and c.typeId = 40
group by a.employeeId, d.id, a.employeeLastName
ORDER BY avCount DESC

该代码的结果是每个id一行。我需要计算所有ID返回的一行。

编辑：新结果 empID计数器avCount 138050 1 24 138050 1 23 138050 1 20 138050 1 14 138050 1 7

Answer 1

您只需要group by a.employeeId, a.employeeLastName并计算不同的ID：

Select a.employeeId, a.employeeLastName, COUNT(DISTINCT d.id) as counter
From tblEmployees a
         LEFT JOIN tblEvents b on b.employeeId = a.employeeId
         LEFT JOIN tblEventsType c on c.typeId = b.typeId
         LEFT JOIN assets d on d.id = b.assetId
WHERE a.employeeId = 138050
  AND d.type = 'Article'
  and c.typeId = 40
group by a.employeeId, a.employeeLastName

如何返回总数的计数？

1 个答案: