更好的SQL分页技术

时间:2013-09-21 07:29:07

标签: sql sql-server sql-server-2012

有没有更好的方法在SQL Server中进行分页?

例如,我必须使用以下技术将@skip添加到@take:

;WITH tmp_cte AS (
 SELECT ROW_NUMBER() OVER (ORDER BY LastName) AS RowNumber,
        LastName, 
        FirstName
   FROM person.Person
  WHERE FirstName like '%ad%'
)
SELECT * 
FROM tmp_cte 
WHERE RowNumber > @skip --10 
AND RowNumber <= @Take--20

有没有更好的方法,所以我不必添加跳过?

2 个答案:

答案 0 :(得分:6)

在SQL 2012中,它非常简单:

SELECT LastName, FirstName
  FROM person.Person
 WHERE FirstName like '%ad%'
 ORDER BY LastName
 OFFSET 10 ROWS 
 FETCH NEXT 10 ROWS ONLY;

查看this link以了解其他版本的SQL服务器+性能比较。

答案 1 :(得分:0)

如果Person.Person表上有唯一索引,则可以使用更好的解决方案(例如,PersonID列上有唯一索引,并且此索引是群集的 - 例如,如果您有群集PK)。在这种情况下,上面的查询可以重写:

;WITH tmp_cte AS (
    SELECT ROW_NUMBER() OVER (ORDER BY LastName) AS RowNumber, PersonID
    FROM person.Person
    WHERE FirstName like '%ad%'
)
SELECT ...
FROM Person.Person p
WHERE p.PersonID IN -- PersonID is the key of this UNIQUE INDEX
(
SELECT PersonID FROM tmp_cte 
WHERE RowNumber > @skip 10 AND RowNumber <= @Take--20
)

DECLARE @Rows TABLE (ID INT PRIMARY KEY);
;WITH tmp_cte AS (
    SELECT ROW_NUMBER() OVER (ORDER BY LastName) AS RowNumber, PersonID
    FROM person.Person
    WHERE FirstName like '%ad%'
)
INSERT @Rows (ID)
SELECT PersonID FROM tmp_cte 
WHERE RowNumber > @skip 10 AND RowNumber <= @Take--20

SELECT ...
FROM Person.Person p
WHERE p.PersonID IN (SELECT ID FROM @Rows); -- PersonID is the key of this UNIQUE INDEX

注意#1 :在这种特殊情况下,(FirstName, LastName)(LastName, FirstName)上的索引也可能有用。

注意#2 :如果最终SELECT子句中有更多列,此解决方案应该会更好。