In this tutorial, you will find out how to use the Create Table statement to create new tables in PostgreSQL.
Syntax
Create Table is a keyword (watchword), which notifies the database
system to create a new table. The unattainable name for the table or identifier
follows the given statement in the table. In the beginning, the applicant
issuing an empty database has the current database.
Then, in the brackets, the list comes up, evaluates
each column of the table, and what kind of data it is. The syntax from the
example below will be clear.
The PostgreSQL CREATE table description is used to
create a new table in any database.
Syntax
To create a new table in PostgreSQL, you employ the
Create Table statement. The following table
CREATE
TABLE
table_name(<field1 name, type, constraints >,<field2 name,
type, constraints > )
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For example, I need to create a table Employee which
will contain the data of employees of an organization like Name, Salary, DOJ,
Department, Position, etc.
Syntax
CREATE TABLE Public.Employee
(
EmpId Serial NOT NULL,
FName character varying(50) NOT NULL,
LName character varying(50) NULL,
DOJ date NOT NULL,
Salary numeric NOT NULL,
DepartMent
character varying(50) NULL,
Position character varying(50) NULL
);
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Check out the syntax of the Create Table Statement in
more detail.
·
After the table is created, first specify the
name of the new table. The temporary keyword is to create a temporary table.
·
After this, you list the column name, its
data type, and the column constraints. Multiple columns in a table can be
separated by a comma (,). The column evaluates the rules for the constraints
column e.g., NOT NULL.
·
After the column list, you define
table-level constraints that determine the rules of the data in the table.
·
After that, you set an existing table from
which the new table is inherited. This means that the new table contains all
the columns in the current table and the columns are explained in the CREATE
TABLE statement. This is a PostgreSQL extension for SQL.
