（1）、在AOT中建立一個(gè)class（aTestForDB）：
（2）、method main（）：
?? static void main(Args args)
{
??? HelloWorld hw? = new HelloWorld();
??? Str sql="select * from userinfo";
??? //**********************
??? //****±?á?μ?éù?÷********
??? //**********************
??? int i=0;
??? str name="XMDDL369";
??? real r_i=23.789;
??? boolean b=false;
??? date d1=11\11\2000;
??? date d3 = 21\11\1998;
??? Integer s=90;
??? int a_i[3];
??? a_i[0]=1;
??? //??2é?ù±?μ?êy?YààDí￡??ˉo?ààDí
??? //è?o?í¨1yààè?μ?êy?Y?aμ?á??ó￡?·μ???????ˉo
??? //òì3￡μ?2?×?oí′|àí
??? //±?á?μ?×÷ó?óò
??? //int a_j[3]={1,2,3};
??? //*********************
??? print hw.sayHello()+" XMDDL369";
??? while(i<10){
??????? print i;
??????? i++;
??? }
??? print name;
??? print r_i;
??? //print any2str("90.9")+name;
??? if(b==true)
??????? print "b is true";
??? else
??????? print "b is not true";
??? print d3;
??? print dayofmth(d3);
??? print dayofwk(d3);
??? print dayofyr(d3);
??? print s;
??? hw.sayWorld();
??? try
??? {
????? print i/0.9;
??? }
??? catch (exception::error)
??? {
?????? print "±? 0 3y";
??? }
??? ///////////////////////////
??? ////////êy?Y?a2ù×÷//////////
??? ////////////////////////////
??? //hw.find();//2é?ˉêy?Y?aè?μ?????
??? //hw.insert();? //???￠é??￠???￠2é￡¨CRUD￡?
??? //hw.update();
??? //hw.delete();
??? hw.executeBySQL(sql);
}
（2）method find（）：
void find()
{
??? UserInfo ui;
??? select ui where? ui.name=="xmddl";
??? print ui.password;
??? while select ui
??? {?? //2é?ˉ?ùóDμ?????
??????? print ui.name+"? "+ui.Id;
??? }
}
（3）、method delete（）：
void delete()
{
??? Userinfo ui;
??? ttsbegin;
??? select forupdate ui where ui.Id=="new";
??? //ui.Id="new";
??? ui.delete();
??? //ui.doDelete();
??? ttscommit;
}
（4）、method update（）：
void update()
{
??? Userinfo ui;
??? ttsbegin;
??????? select forupdate ui where ui.id=="new";
??????? ui.name="xmddl369";
??????? ui.password="hello new";
??????? ui.update();
??? ttscommit;
}
（5）、method insert（）：
void insert()
{
?? Userinfo ui;
?? ttsbegin;
?? ui.Id="new";
?? ui.name="xmddl";
?? ui.insert();
?? ttscommit;
??? /* ?úá??üD?
??? MyTable myTable;
??? RecordInsertList insertList = new RecordInsertList(myTable.TableId, True);
??? int i;
??? for ( i = 1; i <=? 100; i++ )
??? {
??????? myTable.value = i;
??????? insertList.add(myTable);
??? }
??? insertList.insertDatabase();//<-----this is
??? */
}
（6）method executeBySQL（）：
void executeBySQL(Str sql)
{
??? Connection con=new Connection();
??? Statement stmt=con.createStatement();
??? ResultSet rs=stmt.executeQuery(sql);
??? //stmt.executeUpdate(sql);
??? while(rs.next()){
??????? print "SQL "+rs.getString(1);
??? }
}