SQL´´½¨Êý¾Ý¿â¡¢±í¡¢´æ´¢¹ý³Ì¼°µ÷ÓÃ
--Èç¹û´æÔÚÊý¾Ý¿âprogrammerPay ¾Íɾ³ý
if exists (select * from sysdatabases where name='programmerPay')
drop database programmerPay
go
--´´½¨Êý¾Ý¿âprogrammerPay
create database programmerPay
on primary
(
name ='programmerPay_data',
filename='D:\programmerPay\programmerPay_data.mdf',
maxsize=3mb,
filegrowth=15%
)
log on
(
name ='programmerPay_log',
filename='D:\programmerPay\programmerPay_log.ldf',
maxsize=1mb,
filegrowth=15%
)
go
use programmerPay
go
--´´½¨±íprowage
create table prowage
(
id int identity(1,1) not null,--Ö÷¼ü ±êʶÁÐ
Pname char(10) not null,--³ÌÐòÔ±ÐÕÃû
wage int not null--³ÌÐòÔ±¹¤×Ê
)
go
--Ϊ±íprowage id ×Ö¶ÎÌí¼ÓÖ÷¼üÔ¼Êø
alter table prowage
add constraint PK_id primary key(id)
--²åÈë²âÊÔÊý¾Ý
insert into prowage (pname,wage)
values ('ÕÅÈý',5000)
insert into prowage (pname,wage)
values ('ÀîËÄ',1200)
insert into prowage (pname,wage)
values ('¶þÔÂ',1700)
insert into prowage (pname,wage)
values ('À¶Ìì',5700)
insert into prowage (pname,wage)
values ('Ñô¹â',8700)
insert into prowage (pname,wage)
values ('ÉñÖÝ',1100)
insert into prowage (pname,wage)
values ('Ôø¾²Ø',1300)
insert into prowage (pname,wage)
values ('ruo',1200)
insert into prowage (pname,wage)
values ('chend',1400)
--Èç¹û´æÔÚ´æ´¢¹ý³Ìproc_addWage1 ¾Íɾ³ý
if exists (select * from sysobjects where name='proc_addWage1')
drop procedure proc_addWage1
go
--´´½¨´æ´¢¹ý³Ìproc_addWage1
create procedure proc_addWage1
as
set nocount on
declare @firstwage int
select @firstwage=sum(wage) from prowage
while (1=1)
begin
declare @notpass int, @count int--¶¨ÒåÁ½¸ö±äÁ¿ û´ïµ½2200µÄÈËÊýºÍ×ÜÈËÊý
select @notpass=count(*) from prowage where wage<2200
select @count =count(*) from prowage
if(@notpass*
Ïà¹ØÎĵµ£º
Á¬½ÓAccess
Ê×ÏÈ¿´Ò»¸öÀý×Ó´úÂëÆ¬¶Ï:
³ÌÐò´úÂë:
--------------------------------------------------------------------------------
using System.Data;
using System.Data.OleDb;
......
string strConnection="Provider=Microsoft.Jet.OleDb.4.0;";
strConnection+=@"Data Source=C:\BegASPNET\Northwind.mdb" ......
ÔÚWin7ϰ²×°SQL2005¿ª·¢°æ£¬°²×°SQL Native ClientʱÌáʾ°²×°Öжϣ¬Ã»ÓÐÔÚÒ⣬ȻºóÔÚ°²×°SQL ServerʱÓÖÌáʾ“[Microsoft][SQL Native Client]¿Í»§¶Ë²»Ö§³Ö¼ÓÃÜ.SQL Server °²×°³ÌÐòÎÞ·¨Á¬½Óµ½Êý¾Ý¿â·þÎñ½øÐзþÎñÆ÷ÅäÖÃ.”Ð¶ÔØSQL Native ClientÖØÐ°²×°£¬»¹ÊÇÖжϣ¬ÐÞ¸´£¬Ò²Öжϣ¬ÔÙÐ¶ÔØ£¬ÇåÀí×¢²á±í£¬ÖØ× ......
ÃüÌ⣺д³öÒ»ÌõSqlÓï¾ä£º È¡³ö±íAÖеÚ31µ½µÚ40¼Ç¼£¨×Ô¶¯Ôö³¤µÄID×÷ΪÖ÷¼ü, ×¢Ò⣺ID¿ÉÄܲ»ÊÇÁ¬ÐøµÄ¡££©
oracleÊý¾Ý¿âÖУº
1¡¢select * from A where rownum<=40 minus select * from A where rownum<=30
sqlserverÊý¾Ý¿âÖУº
1¡¢select top 10 * from A where id not in (select top 30 id from A )
2¡¢s ......
RowidµÄ¸ÅÄ
rowidÊÇÒ»¸öαÁУ¬¼ÈÈ»ÊÇαÁУ¬ÄÇôÕâ¸öÁоͲ»ÊÇÓû§¶¨Ò壬¶øÊÇϵͳ×Ô¼º¸ø¼ÓÉϵġ£¶Ôÿ¸ö±í¶¼ÓÐÒ»¸örowidµÄαÁУ¬µ«ÊDZíÖв¢²»ÎïÀí´æ´¢ROWIDÁеÄÖµ¡£²»¹ýÄã¿ÉÒÔÏñʹÓÃÆäËüÁÐÄÇÑùʹÓÃËü£¬µ«ÊDz»ÄÜɾ³ý¸ÄÁУ¬Ò²²»ÄܶԸÃÁеÄÖµ½øÐÐÐ޸ġ¢²åÈë¡£Ò»µ©Ò»ÐÐÊý¾Ý²åÈëÊý¾Ý¿â£¬ÔòrowidÔÚ¸ÃÐеÄÉúÃüÖÜÆÚÄÚÊÇΨһµÄ£¬¼´ ......
Ö´Ðмƻ®µÄ²½Öè
Ö´Ðмƻ®µÄÿһ²½·µ»ØÒ»×éÐУ¬ËüÃÇ»òÕßΪÏÂÒ»²½ËùʹÓ㬻òÕßÔÚ×îºóÒ»²½Ê±·µ»Ø¸ø·¢³öSQLÓï¾äµÄÓû§»òÓ¦Óá£ÓÉÿһ²½·µ»ØµÄÒ»×éÐнÐ×öÐÐÔ´(row source£©¡£Í¼5-1Ê÷״ͼÏÔʾÁË´ÓÒ»²½µ½ÁíÒ»²½ÐÐÊý¾ÝµÄÁ÷¶¯Çé¿ö¡£Ã¿²½µÄ±àºÅ·´Ó³ÁËÔÚÄã¹Û²ìÖ´Ðмƻ®Ê±Ëùʾ²½ÖèµÄ˳Ðò£¨ÈçºÎ¹Û²ìÖ´Ðмƻ®½«±»¼ò¶ÌµØËµÃ÷£©¡£Ò»°ãÀ´ ......