fix(postgresql): correct ALTER TABLE command

[kakakakakku]

Description

Thank you for providing an easily understandable PostgreSQL tutorial :)

While following the tutorial, I found a minor mistake in the PostgreSQL Tutorial "ALTER Statements". The instructions involves renaming the "users" table to "users_renamed". Then, the following error occurs:

postgres=# ALTER TABLE users RENAME COLUMN created_at TO created;
ERROR:  relation "users" does not exist

I fixed it like below.

postgres=# ALTER TABLE users_renamed RENAME COLUMN created_at TO created;
ALTER TABLE

Could you review please? Thanks.

Related Issues

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Solution and Design

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[praveenweb]

@kakakakakku - Thanks for the PR. Although the ALTER statement was given as a reference, if you actually ended up following it in order as a tutorial, it does fail as you mentioned.

Merging this.