在PostgreSQL中,有Limit和Offset关键字,可以非常容易地对结果集进行分页。
SQL Server的等效语法是什么?
在PostgreSQL中,有Limit和Offset关键字,可以非常容易地对结果集进行分页。
SQL Server的等效语法是什么?
当前回答
select top {LIMIT HERE} * from (
select *, ROW_NUMBER() over (order by {ORDER FIELD}) as r_n_n
from {YOUR TABLES} where {OTHER OPTIONAL FILTERS}
) xx where r_n_n >={OFFSET HERE}
注意: 这个解决方案只能在SQL Server 2005或更高版本中工作,因为这是实现ROW_NUMBER()的时候。
其他回答
我假设,在c#表达式/LINQ语句的跳过和采取生成下面的SQL命令
DECLARE @p0 Int = 1
DECLARE @p1 Int = 3
SELECT [t1].[Id]
FROM (
SELECT ROW_NUMBER() OVER (ORDER BY [t0].[Id]
FROM [ShoppingCart] AS [t0]
) AS [t1]
WHERE [t1].[ROW_NUMBER] BETWEEN @p0 + 1 AND @p0 + @p1
ORDER BY [t1].[ROW_NUMBER]
您可以在公共表表达式中使用ROW_NUMBER来实现这一点。
;WITH My_CTE AS
(
SELECT
col1,
col2,
ROW_NUMBER() OVER(ORDER BY col1) AS row_number
FROM
My_Table
WHERE
<<<whatever>>>
)
SELECT
col1,
col2
FROM
My_CTE
WHERE
row_number BETWEEN @start_row AND @end_row
这里有人在sql 2011中讲述了这个功能,令人遗憾的是,他们选择了一个有点不同的关键字“OFFSET / FETCH”,但它不是标准的,然后ok。
另一个例子:
declare @limit int
declare @offset int
set @offset = 2;
set @limit = 20;
declare @count int
declare @idxini int
declare @idxfim int
select @idxfim = @offset * @limit
select @idxini = @idxfim - (@limit-1);
WITH paging AS
(
SELECT
ROW_NUMBER() OVER (order by object_id) AS rowid, *
FROM
sys.objects
)
select *
from
(select COUNT(1) as rowqtd from paging) qtd,
paging
where
rowid between @idxini and @idxfim
order by
rowid;
这个特性现在在SQL Server 2012中变得很容易。 这是从SQL Server 2012开始工作的。
在SQL Server中限制偏移量为11到20行:
SELECT email FROM emailTable
WHERE user_id=3
ORDER BY Id
OFFSET 10 ROWS
FETCH NEXT 10 ROWS ONLY;
订购方式:必需 OFFSET:可选的跳过行数 NEXT:所需的下一行数
参考:https://learn.microsoft.com/en-us/sql/t-sql/queries/select-order-by-clause-transact-sql