DEFAULT Option in SQL

DEFAULT Option :

• Specify a default value for a column during an insert.
• ... hire_date DATE DEFAULT CURRENT_DATE, ...
• Literal values, expressions, or SQL functions are legal values.
• Another column’s name or a pseudo column are illegal values.
• The default data type must match the column data type.
• CREATE TABLE hire_dates (id numeric(8), hire_date DATE DEFAULT CURRENT_DATE);

Create the table :

• CREATE TABLE dept_info (deptno numeric(2), dname varchar(14), loc varchar(13), create_date DATE DEFAULT CURRENT_DATE);
  

Confirm table creation :

• \d dept_info
  

Referencing Another User’s Tables

• Tables belonging to other users are not in the user’s schema.

• You should use the schema name as a prefix to those tables.
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