Sql 使用窗口函数获取总计数
嘿,这就是我到目前为止的疑问:Sql 使用窗口函数获取总计数,sql,sql-server,sql-server-2014,window-functions,Sql,Sql Server,Sql Server 2014,Window Functions,嘿,这就是我到目前为止的疑问: WITH LIMIT AS (SELECT U.userID ,U.username ,U.fname ,U.mname ,U.lname ,U.email ,U.active ,S.sName ,
WITH LIMIT AS
(SELECT
U.userID
,U.username
,U.fname
,U.mname
,U.lname
,U.email
,U.active
,S.sName
,S.sID
,T.[value]
,T.trackingNumberID
,SU.primaryLocation
,row_number() OVER (ORDER BY U.userid) AS RN
,COUNT(*) OVER (ORDER BY U.userid) AS CNT
,UR.roleID
FROM
[---].[dbo].[tblUsers] AS U
LEFT OUTER JOIN [---].[dbo].[tblTrackingNumbers] AS T
ON T.userID = U.userID
LEFT OUTER JOIN [---].[dbo].[tblSU] AS SU
ON U.userID = SU.userID
LEFT OUTER JOIN [---].[dbo].[tblS] AS S
ON SU.sID = S.sID
LEFT OUTER JOIN [---].[dbo].[tblUserRoles] AS UR
ON UR.userID = U.userID
LEFT OUTER JOIN [---].[dbo].[tblRoles] AS R
ON UR.roleID = R.roleID
WHERE
U.active = 1
AND
SU.primaryLocation = 1
AND
SU.active = 1
AND
U.orgID = 1
AND
S.ID = 35
AND U.userID IN (SELECT userID
FROM [---].[dbo].[tblSU] AS SU
INNER JOIN [].[dbo].[tblS] AS S
ON S.sID = SU.sID
WHERE
SU.active = 1
AND
S.sID = 35)
) SELECT * FROM LIMIT WHERE RN Between 0 AND 10000
正如您在上面的查询中所看到的,我正在尝试将(按U.userid排序)作为CNT进行计数(*),这使我的计数与RN相同
我需要的是记录总数这将带回(842行)COUNT(*)(按U.userid排序),因为CNT
计算“运行计数”-直到“该”行的计数。如果要对完整结果中的所有行进行计数,请使用不带排序依据的窗口功能
COUNT(*) OVER () AS CNT
这听起来可能有点胡说八道,但我发现在大型表中,如果您将计数选择到一个变量中,然后选择您的记录并只添加该变量,那么您会获得更好的性能。当表变得太大时,count(*)over()会导致性能下降
DECLARE @RecordCount INT
SELECT @RecordCount = COUNT(*)
FROM [---].[dbo].[tblUsers] AS U
LEFT OUTER JOIN [---].[dbo].[tblTrackingNumbers] AS T ON T.userID = U.userID
LEFT OUTER JOIN [---].[dbo].[tblSU] AS SU ON U.userID = SU.userID
LEFT OUTER JOIN [---].[dbo].[tblS] AS S ON SU.sID = S.sID
LEFT OUTER JOIN [---].[dbo].[tblUserRoles] AS UR ON UR.userID = U.userID
LEFT OUTER JOIN [---].[dbo].[tblRoles] AS R ON UR.roleID = R.roleID
WHERE U.active = 1
AND SU.primaryLocation = 1
AND SU.active = 1
AND U.orgID = 1
AND S.ID = 35
AND U.userID IN (SELECT userID
FROM [---].[dbo].[tblSU] AS SU
INNER JOIN [].[dbo].[tblS] AS S ON S.sID = SU.sID
WHERE SU.active = 1
AND S.sID = 35)
SELECT U.userID,
U.username,
U.fname,
U.mname,
U.lname,
U.email,
U.active,
S.sName,
S.sID,
T.[value],
T.trackingNumberID,
SU.primaryLocation,
@RecordCount AS CNT,
UR.roleID
FROM [---].[dbo].[tblUsers] AS U
LEFT OUTER JOIN [---].[dbo].[tblTrackingNumbers] AS T ON T.userID = U.userID
LEFT OUTER JOIN [---].[dbo].[tblSU] AS SU ON U.userID = SU.userID
LEFT OUTER JOIN [---].[dbo].[tblS] AS S ON SU.sID = S.sID
LEFT OUTER JOIN [---].[dbo].[tblUserRoles] AS UR ON UR.userID = U.userID
LEFT OUTER JOIN [---].[dbo].[tblRoles] AS R ON UR.roleID = R.roleID
WHERE U.active = 1
AND SU.primaryLocation = 1
AND SU.active = 1
AND U.orgID = 1
AND S.ID = 35
AND U.userID IN (SELECT userID
FROM [---].[dbo].[tblSU] AS SU
INNER JOIN [].[dbo].[tblS] AS S ON S.sID = SU.sID
WHERE SU.active = 1
AND S.sID = 35)
ORDER BY U.userID
OFFSET 0 ROWS FETCH NEXT 10000 ROWS ONLY
只需进行计数(*),而不进行分区。这不是你需要的吗?哈,那是一匹没有名字的马。请将此作为正式答案,以便我可以给您评分。您使用RN只是为了限制在1000行以下吗?使用Top或Fetch优先。。。快得多。