Data Type Conversion There're several major data types built in Oracle. Character Numeric Datetime LONG RAW LOB (Large Object) In each major data types, minor… Read More »How to Modify VARCHAR2 to CLOB of a Column
Add NOT NULL Constraint As I mentioned in resolving ORA-00904 for adding a constraint, NOT NULL is a constraint, but it's more like an attribute… Read More »How Oracle Add NOT NULL Constraint