Eh bien, il est rapide approche de Noël, donc voici mon cadeau pour vous, un script exemple qui illustre ce que je crois qu'il est que vous essayez d'atteindre. Non, je n'ai pas une grande barbe blanche duveteuse ;-)
CREATE TABLE TestJobSetTable
(
ID INT IDENTITY(1,1) not null PRIMARY KEY,
JobID INT not null,
DateCompleted DATETIME not null
);
--Create some test data
DECLARE @iX INT;
SET @iX = 0
WHILE(@iX < 15)
BEGIN
INSERT INTO TestJobSetTable(JobID,DateCompleted) VALUES(1,getDate())
INSERT INTO TestJobSetTable(JobID,DateCompleted) VALUES(34,getDate())
SET @iX = @iX + 1;
WAITFOR DELAY '00:00:0:01'
END
--Create some more test data, for when there may be job groups with less than 10 records.
SET @iX = 0
WHILE(@iX < 6)
BEGIN
INSERT INTO TestJobSetTable(JobID,DateCompleted) VALUES(23,getDate())
SET @iX = @iX + 1;
WAITFOR DELAY '00:00:0:01'
END
--Review the data set
SELECT * FROM TestJobSetTable;
--Apply the deletion to the remainder of the data set.
WITH TenMostRecentCompletedJobs AS
(
SELECT ID, JobID, DateCompleted
FROM TestJobSetTable A
WHERE ID in
(
SELECT TOP 10 ID
FROM TestJobSetTable
WHERE JobID = A.JobID
ORDER BY DateCompleted DESC
)
)
--SELECT * FROM TenMostRecentCompletedJobs ORDER BY JobID,DateCompleted desc;
DELETE FROM TestJobSetTable
WHERE ID NOT IN(SELECT ID FROM TenMostRecentCompletedJobs)
--Now only data of interest remains
SELECT * FROM TestJobSetTable
DROP TABLE TestJobSetTable;
Les tables temporaires et les curseurs ne sont pas pris en charge dans SQL Compact. Les différences entre SQL Compact et SQL Server sont disponibles ici: http://technet.microsoft.com/en-us/library/bb896140.aspx –