Question

仍在处理表和查询，但在SQL Server查询方面需要一些帮助。

我有一张看起来像这样的桌子。

VMName   | DiskType   | Status      | Result
---------+------------+-------------+---------
TestVM1  |  OS        | Completed   | 
TestVM1  |  Data      | Completed   | 
TestVM2  |  OS        | Failed      | 
TestVM2  |  Data      | Completed   | 
TestVM2  |  Data      | Completed   |

在结果列中，如果操作系统和数据磁盘的状态都为“完成”，我想将其说为“已完成”。

但是，如果OS磁盘显示失败，则该VM的所有磁盘的结果列应显示失败。

喜欢这个。

VMName   | DiskType   | Status      | Result
---------+------------+-------------+---------
TestVM1  |  OS        | Completed   | Completed
TestVM1  |  Data      | Completed   | Completed
TestVM2  |  OS        | Failed      | Failed
TestVM2  |  Data      | Completed   | Failed
TestVM2  |  Data      | Completed   | Failed

我尝试将一个查询合并在一起，但是不知道我在做什么错，因为它什么也没做。

UPDATE working_table t1
SET Result = 'Failed'
WHERE disktype = 'OS' AND 
      status = 'Failed' AND
      NOT EXISTS (SELECT 1 FROM working_table t2 WHERE t1.VMname = t2.VMname);

Answer 1

似乎只需要一个EXISTS

UPDATE t1
SET Result = 'Failed'
FROM working_table t1
WHERE EXISTS (
      SELECT 1 
      FROM working_table t2 
      WHERE t2.VMname = t1.VMname
        AND t2.disktype = 'OS' 
        AND t2.[Status]= 'Failed'
);

或者，如果您想更新所有结果，不仅是那些失败的结果：

UPDATE t1
SET Result = CASE
             WHEN EXISTS (SELECT 1 FROM working_table t2 WHERE t2.VMname = t1.VMname AND t2.disktype = 'OS' AND t2.[Status] = 'Failed') 
             THEN 'Failed' 
             ELSE t1.[Status] 
             END
FROM working_table t1;

Answer 2

请尝试

create table  working_table
(
VMName varchar(30),
DiskType  varchar(64),
[Status] varchar(30),
Result varchar(64)
)

insert into working_table values
('TestVM1','OS','Completed',NULL),
('TestVM1','Data','Completed',NULL),
('TestVM2','OS','Failed',NULL),
('TestVM2','Data','Completed',NULL),
('TestVM2','Data','Completed',NULL)

;WITH CTE AS
(
SELECT 
*,
SUM(CASE [Status] WHEN 'Failed' THEN 1 ELSE 0 END) OVER (partition by VMName) as v_flag  
FROM working_table
)
UPDATE CTE SET Result=CASE WHEN  v_flag >0 THEN 'Failed' ELSE 'Completed' END

--Query
SELECT * FROM working_table

--Output
/*
VMName                         DiskType                                                         Status                         Result
------------------------------ ---------------------------------------------------------------- ------------------------------ ----------------------------------------------------------------
TestVM1                        OS                                                               Completed                      Completed
TestVM1                        Data                                                             Completed                      Completed
TestVM2                        OS                                                               Failed                         Failed
TestVM2                        Data                                                             Completed                      Failed
TestVM2                        Data                                                             Completed                      Failed
*/

最好的问候，

会

Answer 3

此查询可能会对您有所帮助。

SELECT *,MAX(status) 
         OVER ( 
           partition BY vmname 
           ORDER BY vmname ) [Results] 
FROM   working_table

您可以根据此结果更新表格

SQL Server查询更新具有相同名称的多行

3 个答案: