SQL Server分页3种方案比拼
建立表:
CREATE TABLE [TestTable] (
[ID] [int] IDENTITY (1, 1) NOT NULL ,
[FirstName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL ,
[LastName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL ,
[Country] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[Note] [nvarchar] (2000) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO
插入数据:(2万条,用更多的数据测试会明显一些)
SET IDENTITY_INSERT TestTable ON
declare @i int
set @i=1
while @i<=20000
begin
insert into TestTable([id], FirstName, LastName, Country,Note) values(@i, 'FirstName_XXX','LastName_XXX','Country_XXX','Note_XXX')
set @i=@i+1
end
SET IDENTITY_INSERT TestTable OFF
-------------------------------------
分页方案一:(利用Not In和SELECT TOP分页)
语句形式:
SELECT TOP 10 *
from TestTable
WHERE (ID NOT IN
(SELECT TOP 20 id
from TestTable
ORDER BY id))
ORDER BY ID
SELECT TOP 页大小 *
from TestTable
WHERE (ID NOT IN
(SELECT TOP 页大小*页数 id
from 表
ORDER BY id))
ORDER BY ID
-------------------------------------
分页方案二:(利用ID大于多少和SELECT TOP分页)
语句形式:
SELECT TOP 10 *
from TestTable
WHERE (ID >
(SELECT MAX(id)
from (SELECT TOP 20 id
from TestTable
ORDER BY id) AS T))
ORDER BY ID
SELECT TOP 页大小 *
from TestTable
WHERE (ID >
 
相关文档:
CREATE proc page
@RecordCount int output,
@QueryStr nvarchar(100)='table1',--表名、视图名、查询语句
@PageSize int=20, --每页的大小(行数)
@PageCurrent int=2, --要显示的页 从0开始
@FdShow nvarchar (1000)='*', --要显示的字段列表
@IdentityStr nvarchar (100)='id', --主键
@WhereStr nvarchar ......
字符类型:
CHAR(size):固定长度字符串,最大长度2000 bytes
VARCHAR2(size):可变长度的字符串,最大长度4000 bytes,可做索引的最大长度749
NCHAR(size):根据字符集而定的固定长度字符串,最大长度2000 bytes
NVARCHAR2(size):根据字符集而定的可变长度字符串,最大长度4000 byte
LONG:变长的字符串,最大长度限 ......
要求: 按 lct1, lct2 排序后的前两条纪录,显示为下列结果:
item_cd1 item_cd2 lct
01 a   ......
--------------------------------查询系统库中是否有库(有库就删除此库)----------------------------------------------------
use master
if exists(select * from databases where name='库名')
drop database 库名
__________________________ 建数据库建表的基本格式 __________________ ......