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Home Data Science Data Science Tutorials PostgreSQL Tutorial PostgreSQL Cheat Sheet

PostgreSQL Cheat Sheet

Priya Pedamkar
Article byPriya Pedamkar

Updated May 22, 2023

PostgreSQL Cheat Sheet

Introduction to PostgreSQL Cheat Sheet

PostgreSQL cheat sheet is defined as how to use the basic commands of PostgreSQL, we have created our basic cheat sheet of PostgreSQL to take a quick overview of the PostgreSQL database. We can create a cheat sheet like how to list the databases, how to list the tables, how to list all users, how to create a database, how to drop the database, and how to drop the table. We can also check how to access a specific database by a specific user.

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Cheat Sheet of PostgreSQL

Below are the basic commands of the cheat sheet for an overview of the PostgreSQL database.

1. Access the PostgreSQL server using psql command

Below is the syntax and example to access the database server using the psql command.

Syntax

psql –U [username] –W [password] –d [database_name]

Example

psql -U postgres -W -d testing

PostgreSQL Cheat Sheet output 1

2. Connect to the specific database

Below is the syntax and example of connecting to the specific database. We have connected to the testing database.

Syntax

\c name_of_database;

Example

\c testing;

PostgreSQL Cheat Sheet output 2

3. Check the version of the PostgreSQL database

Below is the syntax and example of checking the version of PostgreSQL.

Syntax

select version();

Example

select version();

PostgreSQL Cheat Sheet output 3

4. List all databases from the PostgreSQL server

Below is the syntax and example to check all databases from the database server.

Syntax

# \l       OR       \l+

Example

\l+

PostgreSQL ALTER TABLE output 4

5. List all schema from the PostgreSQL server

Below is the syntax and example to check all schema from the database server.

Syntax 

# \dn    OR       \dn+

Example 

\dn
\dn+

PostgreSQL Cheat Sheet output 5

6. List all tablespaces from the PostgreSQL server

Below is the syntax and example to check all tablespaces from the database server.

Syntax 

# \db    OR       \db+

Example 

\db
\db+

PostgreSQL Cheat Sheet output 6

7. List all indexes from the PostgreSQL server

Below is the syntax and example to check all indexes from the database server.

Syntax 

# \di     OR       \di+

Example 

\di
\di+

PostgreSQL Cheat Sheet output 7

8. List all tables from a specific database

Below is the syntax and example to check all tables from a specific database.

Syntax 

# \dt    OR       \dt+

Example 

\dt
\dt+

output 8

9. List all sequences from the PostgreSQL server

Below is the syntax and example to check all sequences from the database server.

Syntax 

# \ds    OR       \ds+

Example 

\ds
\ds+

output 9

10. List all views from the PostgreSQL server

Below is the syntax and example to check all views from the database server.

Syntax 

# \dv    OR       \dv+

Example 

\dv
\dv+

output 10

11. List extensions from the PostgreSQL server

Below is the syntax and example to check the extensions from the database server.

Syntax 

# \dx    OR       \dx+

Example 

\dx
\dx+

output 11

12. Show detailed information on a database table

Below is the syntax and example to show detailed information about the database table.

Syntax 

\d name_of_table;
\d+ name_of_table;

Example 

\d stud1;
\d+ stud1;

output 12

13. Create a new user in PostgreSQL

Below is the example and syntax to create a new user in PostgreSQL. We have created a test user.

Syntax 

Create user name_of_user;

Example 

Create user test password 'abc@123';

output 13

14. Create a new database in PostgreSQL

Below is the example and syntax to create a new database in PostgreSQL. We have created a test database.

Syntax 

Create database name_of_database;

Example 

Create database test;

output 14

15. Drop database in PostgreSQL

Below is the example and syntax to drop the database in PostgreSQL. We have deleted the test database.

Syntax 

Drop database name_of_database;

Example 

Drop database test;

output 15

16. Create a new table in PostgreSQL

Below is the example and syntax to create a new table in PostgreSQL. We have created a test table.

Syntax 

Create table name_of_table (name_of_column1 data_type, name_of_column1 data_type,name_of_column1 data_type, …, name_of_columnN data_type,);

Example 

Create table test (id int, name varchar, address varchar, phone int);

output 16

17. Create a new view in PostgreSQL

Below is the example and syntax to create a new view in PostgreSQL. We have created a test view.

Syntax 

Create view name_of_viewAS select column_name1, column_name2, column_name3, …, column_nameN from table_name;

Example 

Create view test AS select * from stud1;

output 17

18. Create a new index in PostgreSQL

Below is the example and syntax to create a new index in PostgreSQL. We have created a test_idx index.

Syntax 

Create index name_of_index AS on name_of_table (name_of_column);

Example 

create index test_idx on stud1 (id);

output 18

19. Drop index in PostgreSQL

Below is the example and syntax to drop the index in PostgreSQL. We have to delete the test_idx index.

Syntax 

Drop index name_of_index;

Example 

Drop index test_idx;

output 19

Recommended Articles

We hope that this EDUCBA information on “PostgreSQL Cheat Sheet” was beneficial to you. You can view EDUCBA’s recommended articles for more information.

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