postgreSQL Adding columns

ALTER TABLE simple_users ADD COLUMN password text;

Adding the same column to the parent table will merge the definition of both columns:

ALTER TABLE users ADD COLUMN password text;

NOTICE: merging definition of column "password" for child "simple_users"

Dropping columns

Using our altered tables:

ALTER TABLE users DROP COLUMN password;

Since we first added the column to simple_users, PostgreSQL makes sure this column isn't dropped.

Now if we had another child table, its password column would, of course, have been dropped.

Conclusion

In this page (written and validated by A. Gawali) you learned about postgreSQL Adding columns . What's Next? If you are interested in completing postgreSQL tutorial, your next topic will be learning about: postgreSQL INSERT.

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