Question

我在SQL Server 2012中工作。我有一个包含2列以下的表

＆＃13;

table, th, td {
    border: 1px solid black;
     border-collapse: collapse;
}
th, td {
    padding: 15px;
}

＆＃13;

<table style="width:100%">
   <tr>
    <th>ID</th>
     <th>Version</th> 
   </tr>
  <tr>
    <td>1</td>
     <td>0</td> 
   </tr>
   <tr>
    <td>1</td>
     <td>1</td> 
   </tr>
   <tr>
    <td>1</td>
     <td>2</td> 
   </tr>
   <tr>
    <td>1</td>
     <td>3</td> 
   </tr> 
  <tr>
    <td>2</td>
     <td>0</td> 
   </tr>
   <tr>
    <td>2</td>
     <td>1</td> 
   </tr>
   <tr>
    <td>2</td>
     <td>2</td> 
   </tr>
   <tr>
    <td>3</td>
     <td>0</td> 
   </tr>
   <tr>
    <td>3</td>
     <td>1</td> 
   </tr>
</table>

＆＃13;

我想只获得拥有2个以上版本的id而不包含最新的2个版本（意味着Id 1有4个版本，其中我只需要提取最新的2个版本（3,2））。

＆＃13;

table, th, td {
    border: 1px solid black;
     border-collapse: collapse;
}
th, td {
    padding: 15px;
}

＆＃13;

<table style="width:100%">
   <tr>
    <th>Id</th>
     <th>Version</th> 
   </tr>
  <tr>
    <td>1</td>
     <td>0</td> 
   </tr>
  <tr><td>1</td>
  <td>1</td></tr>
  <tr><td>2</td>
  <td>0</td></tr>
</table>

＆＃13;

如何编写查询？我已经尝试了以下查询select * from bitest，其中版本不在（从bitest中选择版本（其中的版本） SELECT Max（版本）
来自bitest
GROUP BY id
HAVING Max（版本）＆gt; = 2
））并且身份证明（从bitest中选择不同的id，其中的版本是（ SELECT Max（版本）
来自bitest
GROUP BY id
HAVING Max（版本）＆gt; = 2
））请更正查询以获得所需的结果

Answer 1

要仅获取包含2个以上版本的ID，请尝试以下操作：

SELECT id,COUNT(version) FROM tt GROUP BY id HAVING COUNT(version)>2

Answer 2

DECLARE @DataSource TABLE
(
    [ID] TINYINT
   ,[Version] TINYINT
);

INSERT INTO @DataSource ([ID], [Version])
VALUES (1,0)
      ,(1,1)
      ,(1,2)
      ,(1,3)
      ,(2,0)
      ,(2,1)
      ,(2,2)
      ,(3,0)
      ,(3,1);

SELECT [ID]
      ,MIN([Version]) AS [Version]
FROM @DataSource
GROUP BY [ID]
HAVING COUNT([Version]) > 2;

Answer 3

如果我理解正确，你正在寻找： -

Set Nocount On;

Declare @test Table
(
     Id             Int
    ,Version        Int
)

Insert Into @test(Id,Version) Values
 (1,0) 
,(1,1) 
,(1,2) 
,(1,3) 
,(2,0) 
,(2,1) 
,(2,2) 
,(3,0) 
,(3,1) 


Select  *
From    @test As t
Where   t.Version Not In (  Select  Top 2
                                    t.Version
                            From    @test As t
                            Order By t.Version Desc
                         )

---- Ids which having more than 2 versions BUT NOT latest 2 Versions.
Select   t.Id
From    @test As t
Where   t.Version Not In (  Select  Top 2
                                    t.Version
                            From    @test As t
                            Order By t.Version Desc
                         )
Group By t.Id
Having Count(t.Version) > 2

用于获取不包含最新版本

3 个答案: