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¶ÁÈ¡oracle blob×Ö·û´®

OleDbConnectioncon=newOleDbConnection(cnnstr);
try
{
con.Open();
}
catch
{}
OleDbCommandcmd=newOleDbCommand(strSQL,con);
System.Data.OleDb.OleDbDataReaderdr=cmd.ExecuteReader();
while(dr.Read())
 
{
stringdd=dr["gggg"].ToString();
byte[]ooo=(byte[])dr["hhhh"];
stringstr;
str=System.Text.Encoding.Unicode.GetString(ooo);
this.textBox1.Text=str;
 
}
}
 
 
 //ÏòÊý¾Ý¿âÖÐдÈë
        private void button1_Click(object sender, EventArgs e)
        {
            oracleConnection1.Open();
          
            OracleCommand cmd = new OracleCommand("UPDATE TEST SET F2 =:blob where F1=:sn ", oracleConnection1);
           
            cmd.Parameters.Add(new OracleParameter("blob",OracleType.Blob));
              cmd.Parameters.Add(new OracleParameter("sn",OracleType.Int32));
             FileInfo fi = new FileInfo("c:\\dos.doc");
             FileStream fs = fi.OpenRead();
             byte[] MyData = new byte[fs.Length];
             fs.Read(MyData, 0, System.Convert.ToInt32(fs.Length));
             fs.Close();
            cmd.Parameters["blob"].Value = MyData;
            cmd.Parameters["sn"].Value = 1;
&nbs


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oracleÖÐʵÏÖ×ÔÔöÁÐ

1.´´½¨Ñ§Éú±í£º
CREATE TABLE student (
    xh number primary key,   
    Name varchar2(10) not null);
   
2. ´´½¨ÐòÁУº
CREATE SEQUENCE student_seq   
START WITH 1   
INCREMENT BY 1
NOCACHE;
°´»Ø³ ......

Oracle:PL/SQL ÖÐÈçºÎʹÓÃArray

http://tech.163.com/05/0701/10/1NIODMQS00091589.html
ÒòΪÔÚPL/SQL Öв¢Ã»ÓÐÊý×é.
ÕâÊÇż²é×ÊÁÏÕҵķ¶ÀýºÍ×Ô¼ºÐ´µÄ·¶ÀýÀ´½âÊÍÈçºÎÔÚPL/SQL ÖÐʹÓÃÊý×é. Ò²ÐíºÜ¶àÈËÒÑÖªµÀ, ²»¹ý¾ÍÊÇÈò»ÖªµÀµÄÅóÓÑÃÇÁ˽âһϰɡ£
----------------------
µ¥Î¬Êý×é
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DECLARE
TYPE
emp_ssn_array IS TA ......

Oracle Sql¼¼ÇÉ Upsert, Multitable Insert, Undrop

UpSert¹¦ÄÜ£º
MERGE <hint> INTO <table_name>
USING <table_view_or_query>
ON (<condition>)
WHEN MATCHED THEN <update_clause>
WHEN NOT MATCHED THEN <insert_clause>;
MultiTable Inserts¹¦ÄÜ£º
Multitable inserts allow a single INSERT INTO .. SELECT statement to ......

ORACLE directory Ŀ¼


Create directoryÈÃÎÒÃÇ¿ÉÒÔÔÚOracleÊý¾Ý¿âÖÐÁé»îµÄ¶ÔÎļþ½øÐжÁд²Ù×÷£¬¼«´óµÄÌá¸ßÁËOracleµÄÒ×ÓÃÐԺͿÉÀ©Õ¹ÐÔ¡£
ÆäÓ﷨Ϊ:
CREATE [OR REPLACE] DIRECTORY directory AS 'pathname';
±¾°¸Àý¾ßÌå´´½¨ÈçÏÂ:
create or replace directory exp_dir as '/tmp';
Ŀ¼´´½¨ÒԺ󣬾ͿÉÒ԰ѶÁдȨÏÞÊÚÓèÌØ¶¨Óû§ ......

ORACLEµ¼³öºÍµ¼ÈëʵÓóÌÐò

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q      µ¼³öʵÓóÌÐò½«Êý¾Ý¿âÖеĶÔÏó¶¨ÒåºÍÊý¾Ý±¸·Ýµ½Ò»¸ö²Ù×÷ϵͳ¶þ½øÖÆÎļþÖÐ
q      µ¼ÈëʵÓóÌÐò¶ÁÈ¡¶þ½øÖƵ¼³öÎļþ²¢½«¶ÔÏóºÍÊý¾ÝÔØÈëÊý¾Ý¿âÖÐ ......
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