有将列转换为字符串列表的示例，但我想相信我的情况不同。
我正在做一个监控磁盘空间增长的项目，从下表我想得到这样的结果：
Drive [Next Autogrowth] [DB Files]
F Database IntEng2 will grow 2 GB in 27 Weeks Data
G N/A Transaction Log
H N/A Data, Transaction Log
I N/A TempDB Data, TempDB Transaction Log
我设法获得[Next Autogrowth]，但我正在努力使用[DB Files]列。
你能帮忙吗？
有两条规则可供遵循：
1) when in the FILE_TYPE column there is ROW
A) when in the DATABASENAME column you have "tempdb" - add "TempDB Data" to the [DB Files] ELSE write "Data"
2) when in the FILE_TYPE column there is LOG
A) when in the DATABASENAME column you have "tempdb" - add "TempDB Transaction Log" to the [DB Files] ELSE write "Transaction Log"
表格是：
SET NOCOUNT ON
DECLARE @T TABLE(
DRIVE NCHAR(1)
,FILE_TYPE NVARCHAR(20)
,DATABASENAME NVARCHAR(100)
,AUTOGROWTH_IN_MB INT
,WEEKS_TO_AUTOGROWTH INT
,MONTHS_TO_AUTOGROWTH INT
)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('F','ROWS','Bocss2',1024,218,49)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('F','ROWS','IntEng2',2048,27,7)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('H','ROWS','Shop',64,0,0)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('G','LOG','Bocss2',2048,147,87)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('G','LOG','IntEng2',1000,254,133)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('G','LOG','Shop',64,0,0)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('H','LOG','Bocss2',2014,147,87)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('H','LOG','IntEng2',512,255,133)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('I','ROWS','tempdb',1024,2046,614)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('I','ROWS','tempdb',1024,2046,682)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('I','ROWS','tempdb',1024,2046,613)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('I','ROWS','tempdb',1024,2046,682)
INSERT INTO @T (DRIVE,FILE_TYPE,DATABASENAME,AUTOGROWTH_IN_MB,WEEKS_TO_AUTOGROWTH,MONTHS_TO_AUTOGROWTH) VALUES('G','LOG','tempdb',1024,2,1)
SELECT * FROM @T
目前我所拥有的是：
;WITH R1 AS (
select
*
,the_closest_event=ROW_NUMBER() OVER (PARTITION BY DRIVE ORDER BY
CASE WHEN (WEEKS_TO_AUTOGROWTH < CAST(MONTHS_TO_AUTOGROWTH * 4.3 AS INT)) THEN
WEEKS_TO_AUTOGROWTH ELSE MONTHS_TO_AUTOGROWTH
END )
,NextAutoGrowth= CASE WHEN (DATABASENAME = 'tempdb')
OR (FILE_TYPE = 'LOG' ) THEN 'N\A'
ELSE
CASE WHEN (WEEKS_TO_AUTOGROWTH < CAST(MONTHS_TO_AUTOGROWTH * 4.3 AS INT)) THEN --4.3 BECAUSE 1 MONTH = 4.3 WEEKS
CASE WHEN (WEEKS_TO_AUTOGROWTH > 0) THEN
'Database ' + DATABASENAME + ' will grow ' +
CASE WHEN (AUTOGROWTH_IN_MB >= 1024) THEN -- 1 GB
CAST(CAST(CAST ( AUTOGROWTH_IN_MB / 1024.00 AS NUMERIC(18,2) )AS REAL) AS VARCHAR) + ' GB in '
ELSE -- use MB
CAST (AUTOGROWTH_IN_MB AS VARCHAR) + ' MB in '
END /*case autogrowth is greater than 1 GB*/
+ CAST (WEEKS_TO_AUTOGROWTH AS VARCHAR) + ' Weeks'
ELSE 'N\A'
END /*case number of weeks > 0*/
ELSE
CASE WHEN (MONTHS_TO_AUTOGROWTH > 0) THEN
'Database ' + DATABASENAME + ' will grow ' +
CASE WHEN (AUTOGROWTH_IN_MB >= 1024) THEN -- 1 GB
CAST(CAST(CAST ( AUTOGROWTH_IN_MB / 1024.00 AS NUMERIC(18,2) )AS REAL) AS VARCHAR) + ' GB in '
ELSE -- use MB
CAST (AUTOGROWTH_IN_MB AS VARCHAR) + ' MB in '
END /*case autogrowth is greater than 1 GB*/
+ CAST (MONTHS_TO_AUTOGROWTH AS VARCHAR) + ' Months'
ELSE 'N\A'
END /*case number of months > 0 */
END /*CASE - weeks or months */
END /*case when it is tempdb */
from @T
)
SELECT
* FROM R1
答案 0 :(得分：1)
有趣的问题：）
;with x as (
select distinct drive, case file_type when 'ROWS' then
case databasename when 'tempdb' then 'TempDB Data' else 'Data' end
else
case databasename when 'tempdb' then 'TempDB Transaction Log' else 'Transaction Log' end
end as typ
from @T
),
a as (
select *, row_number() over(partition by drive order by weeks_to_autogrowth) as rn
from @t
)
select distinct x.drive,
case when a.autogrowth_in_mb > 0 and a.weeks_to_autogrowth > 0 then
'Database ' + a.databasename + ' will grow ' + cast(a.autogrowth_in_mb/1024. as varchar) + ' GB in ' + cast(a.weeks_to_autogrowth as varchar) + ' weeks'
else 'N/A' end as [Next Autogrowth],
substring(y.list, 1, len(y.list)-1)
from
x
inner join a on x.drive = a.drive and a.rn = 1
cross apply
(
select t2.typ + ', ' as [text()]
from x t2
where t2.drive = x.drive
for xml path('')
) y(list)
答案 1 :(得分：0)
尝试以下查询 - 可能会有所帮助。
select
DRIVE Drive,
CASE
WHEN FILE_TYPE = 'rows' THEN
CASE
WHEN DATABASENAME = 'tempdb' THEN 'TempDB Data'
ELSE 'Data'
END
WHEN FILE_TYPE = 'log' THEN
CASE
WHEN DATABASENAME = 'tempdb' THEN 'Data, TempDB Transaction Log'
ELSE 'Data, Transaction Log'
END
ELSE ''
END
DBFiles
from
t