The integer data type in PostgreSQL is used to store whole numbers without any decimal places. It is a commonly used data type for representing numeric values in a database.
Creating an Integer Column
When creating a table in PostgreSQL, you can define a column with the integer data type using the following syntax:
CREATE TABLE table_name (
column_name INTEGER
);
In this example, the column_name is defined as an integer data type.
Inserting Integer Values
To insert integer values into an integer column, you can use the INSERT INTO statement. Here’s an example:
INSERT INTO table_name (column_name)
VALUES (10);
This will insert the value 10 into the column_name of the specified table.
Operations with Integer Data Type
The integer data type supports various mathematical operations such as addition, subtraction, multiplication, and division. Here are some examples:
SELECT column_name + 5 FROM table_name;
Subtraction:
SELECT column_name - 5 FROM table_name;
Multiplication:
SELECT column_name * 5 FROM table_name;
Division:
SELECT column_name / 5 FROM table_name;
Data Range of Integer
The integer data type in PostgreSQL can store values ranging from -2147483648 to 2147483647. This range covers a wide range of whole numbers, allowing you to store large and small integer values.
Summary
In summary, the integer data type in PostgreSQL is used to store whole numbers without any decimal places. It supports various mathematical operations and has a wide range of values that can be stored. By using the integer data type, you can efficiently store and manipulate numeric values in your PostgreSQL database.
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