To describe created table schema in PostgreSQL we need to run command on psql CLI

SYNTAX:

/d+ <table_name> 

EX:

postgres=# \d+ student
Table "public.student"
Column | Type | Modifiers | Storage | Stats target | Description
--------+-----------------------+-----------+----------+--------------+-------------
id | integer | not null | plain | |
name | character varying(25) | | extended | |
age | integer | | plain | |
gender | character(1) | | extended | |
Indexes:
"student_pkey" PRIMARY KEY, btree (id)


postgres=# \d+ mentor
Table "public.mentor"
Column | Type | Modifiers | Storage | Stats target | Description
---------+-----------------------+-----------+----------+--------------+-------------
m_id | integer | not null | plain | |
name | character varying(25) | | extended | |
subject | character varying(25) | | extended | |
Indexes:
"mentor_pkey" PRIMARY KEY, btree (m_id)

Above command explaining table structure their column name data types and constraints.