PostgreSQL tutorial for Beginners – PostgreSQL – Schema

PostgreSQL – Schema


schema is a named collection of tables. A schema can also contain views, indexes, sequences, data types, operators, and functions. Schemas are analogous to directories at the operating system level, except that schemas cannot be nested. PostgreSQL statement CREATE SCHEMA creates a schema.


The basic syntax of CREATE SCHEMA is as follows −


Where name is the name of the schema.

Syntax to Create Table in Schema

The basic syntax to create table in schema is as follows −

CREATE TABLE myschema.mytable (


Let us see an example for creating a schema. Connect to the database testdb and create a schema myschema as follows −

testdb=# create schema myschema;

The message “CREATE SCHEMA” signifies that the schema is created successfully.

Now, let us create a table in the above schema as follows −

testdb=# create table
   ID   INT              NOT NULL,
   AGE  INT              NOT NULL,
   ADDRESS  CHAR (25),
   SALARY   DECIMAL (18, 2),

This will create an empty table. You can verify the table created with the command given below −

testdb=# select * from;

This would produce the following result −

 id | name | age | address | salary
(0 rows)

Syntax to Drop Schema

To drop a schema if it is empty (all objects in it have been dropped), use the command −

DROP SCHEMA myschema;

To drop a schema including all contained objects, use the command −


Advantages of using a Schema

  • It allows many users to use one database without interfering with each other.
  • It organizes database objects into logical groups to make them more manageable.
  • Third-party applications can be put into separate schemas so they do not collide with the names of other objects.


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