SQL statements:help

Question

here is a sample code of my application....
int initialDelay = 10000; // start after 10 second
int period = 10000*60*60*24*30; // repeat every month
Timer timer = new Timer();
TimerTask task = new TimerTask() {
public void run() {
try {
MyDBConnection jdbc = new MyDBConnection();
jdbc.init();
Connection conn = jdbc.getMyConnection();
Statement stmt = conn.createStatement();
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date date = new Date();
String[] tbl = {"emticket","emattachment","emhistory","emtracker"};
progTxt.setText("");
Logs l = new Logs();
l.append("Auto Archive");
date.getTime();
//Archive data
progTxt.append("\n\n");
progTxt.append(" Archiving Data...\n ");
stmt.execute("select * into outfile 'c:/emticket " + dateFormat.format(date) + ".csv' fields terminated by ',' enclosed by '\"' lines terminated by '\\n' from emticket where RcvDateTime between date_sub(curdate(),interval 90 day) and curdate()");
stmt.execute("select * into outfile 'c:/emattachment " + dateFormat.format(date) + ".csv' fields terminated by ',' enclosed by '\"' lines terminated by '\\n' from emattachment where EmID in (select EmID from emticket where RcvDateTime between date_sub(curdate(),interval 90 day) and curdate())");
stmt.execute("select * into outfile 'c:/emhistory " + dateFormat.format(date) + ".csv' fields terminated by ',' enclosed by '\"' lines terminated by '\\n' from emhistory where TicketID in (select TicketID from emticket where RcvDateTime between date_sub(curdate(),interval 90 day) and curdate())");
stmt.execute("select * into outfile 'c:/emtracker " + dateFormat.format(date) + ".csv' fields terminated by ',' enclosed by '\"' lines terminated by '\\n' from emtracker where TicketID in (select TicketID from emticket where RcvDateTime between date_sub(curdate(),interval 90 day) and curdate())");
progTxt.append("Done.\n\n");
//Delete data
progTxt.append(" Deleting Data... ");
stmt.execute("delete emticket, emattachment, emhistory, emtracker from emticket, emattachment, emhistory, emtracker where emattachment.EmID=emticket.EmID and emhistory.TicketID=emticket.TicketID and emtracker.TicketID=emtracker.TicketID and where RcvDateTime
"_______"DATE_SUB(CURDATE(),INTERVAL 90 DAY) and CURDATE())");
System.out.println(stmt.getUpdateCount());
progTxt.append("Done.\n\n");
Here's what i want to do....I want to backup file for the current date back to 3 mos...e.g 2007-05-23 down to 2007-02-23...then delete the remaining records...before"02-23-2007 to 05-23-2007"....this is where the query part i that doesn't work....
Delete data
progTxt.append(" Deleting Data... ");
stmt.execute("delete emticket, emattachment, emhistory, emtracker from emticket, emattachment, emhistory, emtracker where emattachment.EmID=emticket.EmID and emhistory.TicketID=emticket.TicketID and emtracker.TicketID=emtracker.TicketID and where RcvDateTime
"_______"DATE_SUB(CURDATE(),INTERVAL 90 DAY) and CURDATE())");
System.out.println(stmt.getUpdateCount());
progTxt.append("Done.\n\n")
I tried putting <>=which means not equal in the "_____"but it fails to work..can somebody help me to work out with this query.

Answer 1

I don't know MySQL, but shouldn't you just use <= ? I also don't understand what the final part 'and CURDATE()' is for...