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/**
*
* ˵Ã÷£º
* £¨1£©±¾ÀýʹÓÃJDBC_ODBCÇŽøÐÐÊý¾Ý¿âÁ¬½Ó£¬¹Ê´ËÐèÒªODBCÊý¾ÝÔ´
* £¨2£©±¾ÀýÖÐSQLΪ¸üÐÂÓï¾ä£¬¹Ê´ËʹÓÃÔØÌåµÄexecuteUpdate·½·¨£¬²¢ÇÒ·µ»ØÊÜÓ°Ïì¼Ç¼Êý
* (3) ÅäÖÃÁ¬½ÓORACLEµÄodbcÊý¾ÝÔ´ora
*/
//µ¼ÈëËùÐèÀà°ü
import java.sql.*;
public class JdbcTestOra2 {
public static void main(String args[]) {
try {
//×°ÔØÇý¶¯³ÌÐò
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//½¨Á¢Êý¾Ý¿âÁ¬½Ó
Connection con =
DriverManager.getConnection("jdbc:odbc:ora","scott","tiger");
//´´½¨SQLÓï¾äÔØÌå
Statement st = con.createStatement();
//Ö´ÐÐSQLÓï¾ä£¬½ÓÊÕÖ´Ðнá¹û
int rs = st.executeUpdate("update emp set
comm=1000");
//´¦Àí½á¹û
System.out.println("Ð޸ļǼÊý£º"+rs);
//ÊÍ·ÅÊý¾Ý¿â×ÊÔ´£¬×¢Òâ˳Ðò
st.close();
con.close();
}
catch (Exception e) {
e.printStackTrace(System
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update usertable u set u.grade =
(select g.grade from grade g where g.userid = u.userid);
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select rownum, t.* from sm_t_pad_new t
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SQL> conn scott/tiger
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SQL> drop table t1 purge;
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Wait Problem Potential Fix Sequential Read Indicates many index reads—tune the code (especially joins) Scattered Read Indicates many full table scans—tune the code; cache small tables ......