grokster questions

grokster answers

• How do I use CREATE OR REPLACE?
• Change all column units from byte to char
• Modify a column to NULL - Oracle
• How can I detect the installed Sun/Oracle JRE on Windows?
• Delete a child and a parent row with one SQL script
• How to check if a column exists before adding it to an existing table in PL/SQL?
• How do I find where JDK is installed on my windows machine?