c# ²Ù×÷mssqlÊý¾Ý¿â º¬Óдø²ÎÊýsqlÓï¾äÔËÐÐ
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<appSettings>
<add key="Default" value="Default" />
</appSettings>
<connectionStrings>
<add name="Default" connectionString="Data Source=192.168.1.197;User ID=diamond;Password=88888888;Initial Catalog=EmailAnalyse" providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Text;
namespace OfficeOutlook
{
/// <summary>
///DataBase µÄժҪ˵Ã÷
/// </summary>
public class DataBase
{
protected SqlConnection BaseSqlConnection = new SqlConnection();//Á¬½Ó¶ÔÏó
protected SqlCommand BaseSqlCommand = new SqlCommand(); //ÃüÁî¶ÔÏó
public DataBase()
{
//
// TODO: ÔÚ´Ë´¦Ìí¼Ó¹¹Ô캯ÊýÂß¼
//
}
protected void OpenConnection()
{
if (BaseSqlConnection.State == ConnectionState.Closed) //Á¬½ÓÊÇ·ñ¹Ø±Õ
try
{
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Course(C#,Cname,T#) ¿Î³Ì±í
SC(S#,C#,score) ³É¼¨±í
Teacher(T#,Tname) ½Ìʦ±í
ÎÊÌ⣺
1¡¢²éѯ“001”¿Î³Ì±È“002”¿Î³Ì³É¼¨¸ßµÄËùÓÐѧÉúµÄѧºÅ£»
select a.S# from (select s#,score from SC where C#='001') a,(select s#,score
fr ......
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if exists(select * from sysobject where name='proc name' and type='p')
drop proc proc name
go
2.¶¨Òå´æ´¢¹ý³Ì
create proc test
@gradel int, --¶¨Òå±äÁ ......
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select replace('lihan','a','b')
&nb ......
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CREATE [Ë÷ÒýÀàÐÍ] INDEX Ë÷ÒýÃû³Æ
ON ±íÃû(ÁÐÃû)
WITH FILLFACTOR = Ìî³äÒò×ÓÖµ0~100
GO
/*ʵÀý*/
USE ¿âÃû
GO
IF EXISTS
(SELECT * from SYSINDEXES WHERE NAME='IX_TEST_TNAME')--¼ì²âÊÇ·ñÒѾ´æÔÚIX_TEST_TNAMEË÷Òý
DROP INDEX
TEST.IX_TEST_TNAME--Èç¹û´æÔÚÔòɾ³ý
--´´½¨Ë÷Òý
CREATE NONCLUSTER ......
select convert(numeric(10,4),iinvnowcost) from ...
decimal ºÍ numeric (À´Ô´sql Áª»ú´ÔÊé)
´ø¶¨µã¾«¶ÈºÍСÊýλÊýµÄ numeric Êý¾ÝÀàÐÍ¡£
decimal[(p[, s])] ºÍ numeric[(p[, s])]
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p£¨¾«¶È£© ......