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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;
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CREATE TABLE student (
xh number primary key,
Name varchar2(10) not null);
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CREATE SEQUENCE student_seq
START WITH 1
INCREMENT BY 1
NOCACHE;
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DECLARE
TYPE
emp_ssn_array IS TA ......
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MERGE <hint> INTO <table_name>
USING <table_view_or_query>
ON (<condition>)
WHEN MATCHED THEN <update_clause>
WHEN NOT MATCHED THEN <insert_clause>;
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Multitable inserts allow a single INSERT INTO .. SELECT statement to ......
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CREATE [OR REPLACE] DIRECTORY directory AS 'pathname';
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create or replace directory exp_dir as '/tmp';
Ŀ¼´´½¨ÒԺ󣬾ͿÉÒ԰ѶÁдȨÏÞÊÚÓèÌØ¶¨Óû§ ......
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q µ¼ÈëʵÓóÌÐò¶ÁÈ¡¶þ½øÖƵ¼³öÎļþ²¢½«¶ÔÏóºÍÊý¾ÝÔØÈëÊý¾Ý¿âÖÐ ......