Rusty questions

Rusty answers

• What is the difference between column_name and qualified_col_name?
• How do I use CREATE OR REPLACE?
• Why Does Oracle 10g to_char(date time) Truncate Strings?
• Clob size in bytes
• How to get real signature with %ROWTYPE
• Oracle: Update a datarow by adding to existing value
• ORA-12704: character set mismatch when performing multi-row INSERT of nullable NVARCHAR's
• Optimizing SELECT query performance