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    DataAdapter ¶ÔÏóÖеÄSQLÃüÁî     ×¢£ºADO.NET¶ÔÏóÄ£ÐÍ ºÍ C#  Òª±È SQL ¸üÊʺϴ¦Àí¸´ÔÓÔËËã ºÍ µ¼º½Âß¼­£¨±ÈÈ磬²éÕÒÏà¹ØµÄÁíÒ»¸ö±íµÄÊý¾Ý£©
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        ²é¿´SQL SELECT¡¢UPDATE¡¢INSERT ºÍ DELETEÃüÁ
    ÃüÁî¹¹½¨Æ÷(command builder)ÓÃÓÚ¸ù¾ÝSELECTÃüÁîÉú³ÉSQLÃüµÄUPDATE¡¢INSERTºÍDELETE)ÃüÁî¡£
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        SqlConnection thisConnection = new SqlConnection(@".........ConnectString...........");         thisConnection.Open();         SqlDataAdapter thisAdapter = new SqlDataAdapter("SELECT CustomerID from Customers", thisConnection);         SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);    //ÓÃCommand builder¹¹½¨ÃüÁî
    
        SqlCommand updateCommand = thisBuilder.GetUpdateCommand();
        Console.WriteLine(updateCommand.CommandText);    // Êä³öbuilder¹¹½¨µÄSQLÃüÁ¿ÉÒÔ¿´µ½SQLÃüÁîÊÇʲôÑùµÄ£¬
                                                               


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sql ¶à±í¹ØÁª²éѯ

 create database example
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create table major
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 spno varchar(10) primary key not null,
 spname varchar(20) not null
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 create table student
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 sno varchar(10) primary key not null,
 sname varchar(10) not null,
 ssex varchar(2) not null, ......

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