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C#ÖÐÓÃÓÚÁ¬½ÓSQLÊý¾Ý¿âµÄSQLHelperÀà

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;   //ÒýÓÃÃüÃû¿Õ¼ä
namespace DAL
{
    /*******************************************************************************
    * Name: SQLHelper
    * File: SQLHelper.cs
    * Description: ÓÃÓÚÍê³É¶ÔÊý¾Ý¿âµÄÏà¹Ø²Ù×÷
    * Author: Ñ©ÀÇ
    * DateTime: 2010Äê05ÔÂ13ÈÕ
    *******************************************************************************/
    public class SQLHelper
    {
        //ÉèÖÃÁ¬½Ó×Ö·û´® —— SQL ServerÑé֤ģʽµÄÁ¬½Ó×Ö·û´®
        //public static string strConn = @"server = PANLING;database = StudentMIS;uid = sa;pwd = sa";
        //ÉèÖÃÁ¬½Ó×Ö·û´® —— WindowsÑé֤ģʽµÄÁ¬½Ó×Ö·û´®
        public static string strConn = @"server = T403-004\HB_SQLSERVER;database = DB_LibraryManage;Integrated Security = SSPI";
        /// <summary>
        /// ¹¦ÄÜÃèÊö£ºÖ´ÐÐADO.NETÔö¡¢É¾¡¢¸Ä²Ù×÷
        /// </summary>
        /// <param name="strText">ÊäÈë²ÎÊý —— ÒªÖ´ÐеÄSQLÓï¾ä(ÃüÁîÎı¾)</param>
        /// <param name="cmdType">ÊäÈë²ÎÊý —— ÒªÖ´ÐеÄSQLÃüÁîÀàÐÍ</param>
        /// <param name="SqlParams">ÊäÈë²ÎÊý —— ÒªÖ´ÐеÄSQLÓï¾äÖеIJÎÊýÁбí(ÃüÁî²ÎÊýÁбí)</param>
        /// <returns>·µ»ØÖ´ÐÐÓ°ÏìµÄÐÐÊý</returns>
        public static int MyExecu


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  select 'drop table ' || table_name || ' purge;'
  from user_tables
  where length(table_name) <= 4;
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    Drop table ±íÃû cascade  constraints;
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--1.ѧÉú±í
Student(S#,Sname,Sage,Ssex) --S# ѧÉú±àºÅ,Sname ѧÉúÐÕÃû,Sage ³öÉúÄêÔÂ,Ssex ѧÉúÐÔ±ð
--2.¿Î³Ì±í
Course(C#,Cname,T#) --C# --¿Î³Ì±àºÅ,Cname ¿Î³ÌÃû³Æ,T# ½Ìʦ±àºÅ
--3.½Ìʦ±í
Teacher(T#,Tname) --T# ½Ìʦ±àºÅ,Tname ½ÌʦÐÕÃû
--4.³É¼¨±í
SC(S#,C#,score) --S# ѧÉú±àºÅ,C# ¿Î³Ì ......

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µ±Ê¹ÓÃMicrosoft SQL Server 2008 Management Studioʱ£¬ÓÐʱÔÚ±íÉè¼ÆÆ÷ÖжԱíËù×öµÄ¸ü¸ÄÎÞ·¨±£´æ£¬¾ßÌå±íÏÖΪ£ºµã»÷±£´æ°´Å¥ºóµ¯³ö±£´æ¶Ô»°¿òÌáʾ£º²»ÔÊÐí±£´æÐÞ¸Ä(Saving changes is not permitted)£¬µ¯³öµÄ¶Ô»°¿òÖ»ÓÐ2¸ö°´Å¥¿ÉÒÔµã»÷£¬Ò»¸öCancelÒ»¸öSave Text File£¬Ç°Ò»¸ö¾Í²»ÓÃ˵ÁË£¬ºóÒ»¸ö±£´æµÄÎļþ¸ù±¾Ã»ÒâÒ壨¿ÉÒ ......

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SELECT
CASE

     WHEN
price IS NULL THEN
'Not yet priced'
     WHEN
price < 10 THEN
'Very Reasonable Title'
     WHEN
price >= 10 AND
price < 20 THEN
'Coffee Table Title'
     EL ......

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         string str = "Create Database " + "DBname";
         string con = "Data Source=10.0.0.249\\sql2005;Initial Catalog=master;Persist Security Info=True;User ID=sa;Password=sa";
   &n ......
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