Oracle 10g的Sql查询中需要澄清

Question

我有一个名为sites的表，其中有多个同名记录。例如：

     Owner Name                      Owner Address    
            A                           XYZ
            A                           ABC
            B                           QWE
            B                           JKL
            C                           ZXC            
            B                           BNM

我的sql查询应返回

A1           XYZ
A2           ABC
B1           QWE
B2           JKL 
B3           BNM
C            ZXC

有人可以给我指点编写这样的查询。我有问题将具有相同所有者名称的记录分组，然后每次为不同的所有者名称应用序列。

Answer 1

您没有提到您正在使用的数据库系统（ SQL =结构化查询语言 - 这是一种查询语言 - 而不是数据库系统......） - 但如果您正在使用SQL Server 2005或更新或任何其他支持CTE（公共表表达式）和ROW_NUMBER函数的RDBMS，您可以使用：

;WITH data AS 
(
    SELECT OwnerName, OwnerAddress,
        RN = ROW_NUMBER() OVER(PARTITION BY OwnerName ORDER BY OwnerAddress)
    FROM dbo.YourTable
)
SELECT
    OwnerName + CAST(RN AS CHAR(1)), OwnerAddress
FROM Data

返回输出：

Answer 2

SELECT OwnerName + Convert(NVARCHAR(10), ROW_NUMBER() OVER (PARTITION BY OwnerName ORDER BY OwnerName)),
       OwnerAddress
FROM   dbo.OwnerTable

Answer 3

试试这个：如果您使用的是SQL Server 2005或更高版本

   ;with cte as (select *,ROW_NUMBER() over(partition by Owner_Name 
    order by Owner_Address desc) as row_num  from sites),
cte1 as(select Owner_Name
    from cte 
    group by Owner_Name
    having COUNT(*)>1)
    select case when C.Owner_Name in (select Owner_Name from cte1) 
       then Owner_Name+CAST(row_num as varchar(10)) 
       else Owner_Name end as Owner_Name,Owner_Address 
       from cte C
       order by Owner_Name

结果集