You can’t create a table with the reserved keyword in PostgreSQL which is a very Common Sense.

But still, people are trying to create a table with Reserved Keywords. The reason is, they don’t know about which keywords are reserved and unreserved.

So in this post, I am sharing a script to check the list of Reserved and Unreserved keywords of PostgreSQL.

Sample table which we can’t create with reserved keyword:

CREATE TABLE all (ID INT);

ERROR:  syntax error at or near "all"
LINE 2: CREATE TABLE all (ID INT);
                     ^
********** Error **********

ERROR: syntax error at or near "all"
SQL state: 42601
Character: 15

Sample table which we can create with unreserved keyword:
ALTER – look like reserved keyword, but it is not.

CREATE TABLE ALTER (ID INT);

Check all the reserved keywords:

SELECT *
FROM pg_get_keywords() 
WHERE catdesc = 'reserved';

Check all the unreserved keywords:

SELECT *
FROM pg_get_keywords() 
WHERE catdesc = 'unreserved';