PostgreSQL tutorial for Beginners – PostgreSQL – CREATE Table

PostgreSQL – CREATE Table


The PostgreSQL CREATE TABLE statement is used to create a new table in any of the given database.


Basic syntax of CREATE TABLE statement is as follows −

CREATE TABLE table_name(
   column1 datatype,
   column2 datatype,
   column3 datatype,
   columnN datatype,
   PRIMARY KEY( one or more columns )

CREATE TABLE is a keyword, telling the database system to create a new table. The unique name or identifier for the table follows the CREATE TABLE statement. Initially, the empty table in the current database is owned by the user issuing the command.

Then, in brackets, comes the list, defining each column in the table and what sort of data type it is. The syntax will become clear with an example given below.


The following is an example, which creates a COMPANY table with ID as primary key and NOT NULL are the constraints showing that these fields cannot be NULL while creating records in this table −

   NAME           TEXT    NOT NULL,
   AGE            INT     NOT NULL,
   ADDRESS        CHAR(50),
   SALARY         REAL

Let us create one more table, which we will use in our exercises in subsequent chapters −

   DEPT           CHAR(50) NOT NULL,
   EMP_ID         INT      NOT NULL

You can verify if your table has been created successfully using d command, which will be used to list down all the tables in an attached database.

testdb-# d

The above given PostgreSQL statement will produce the following result −

           List of relations
 Schema |    Name    | Type  |  Owner
 public | company    | table | postgres
 public | department | table | postgres
(2 rows)

Use tablename to describe each table as shown below −

testdb-# d company

The above given PostgreSQL statement will produce the following result −

        Table ""
  Column   |     Type      | Modifiers
 id        | integer       | not null
 name      | text          | not null
 age       | integer       | not null
 address   | character(50) |
 salary    | real          |
 join_date | date          |
    "company_pkey" PRIMARY KEY, btree (id)


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