Hi, I used explain plan and got the following results. Based on cost and time, does query 2 perform significantly better than query 1? The runtime for query 1 is approximately 1 minute and 40 seconds, but it shows 07:47:02. Why is the estimated time so different from the actual? ...

Hi, Tom. Please see below script. create table t0326 (id number, num varchar2(100)); declare v_empno number:=125854437665589038536841445202964995521300; begin dbms_output.put_line('v_empno -- ' || v_empno); dbms_output.put_line('to_char(v_empno) -- '|| to_char(v_empno)); i

Hello Tom, A colleague of mine is a big fan of service-oriented architectures and middle-ware. His view is that dblinks are 99.9% of the time a bad idea and that you should go via some sort of message layer in order to pass information between applications. In many circumstances ...

We recently had a database failure that resulted in data loss after an Oracle 19.3.0.0.0 database had both both its control, and redo log files deleted. Please note that I am not a DBA, but simply an analyst that supports the system that sits on this Oracle database. Any amount o...

Is 'SELECT * FROM :TABLE_NAME;' available?