Question

我如何添加＆＃34;姓名＆＃34;此查询的字段

    SELECT Address, 
           COUNT(*) AS CountOf
      FROM dbo.myDB
     WHERE Address IS NOT NULL
  GROUP BY Address
    HAVING COUNT(*) > 1

我试过

SELECT Name, 
       Address ...

但是回来时出现错误

谢谢，

Answer 1

如果您要将名称添加为列，则必须将其添加到group by ，或将其包含在汇总功能中：< / p>

SELECT
Address, Name, COUNT(*) AS CountOf
FROM dbo.myDB
WHERE Address IS NOT NULL
GROUP BY Address, Name
HAVING COUNT(*)>1

Answer 2

您必须将字段Name添加到SELECT和GROUP BY

SELECT
Address, Name, COUNT(*) AS CountOf
FROM dbo.myDB
WHERE Address IS NOT NULL
GROUP BY Address, Name
HAVING COUNT(*)>1

Answer 3

SELECT
Address, MAX(Name) NAME, COUNT(*) AS CountOf
FROM dbo.myDB
WHERE Address IS NOT NULL
GROUP BY Address
HAVING COUNT(*)>1

SELECT
Address, MIN(Name) NAME, COUNT(*) AS CountOf
FROM dbo.myDB
WHERE Address IS NOT NULL
GROUP BY Address
HAVING COUNT(*)>1

Answer 4

您尝试访问的表格如何？如果您没有字段名称，可以在查询中调用它编辑：我没看到小组。如果你有一个group by子句，那么select上的每个字段也必须在组中（除了像avg这样的公式，总和......）

添加字段到查询

4 个答案: