What Data Type Is IP Address in PostgreSQL?

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Heather Bennett

In PostgreSQL, the IP address is a data type that allows you to store and manipulate IP addresses. This data type is called inet.

The inet Data Type

The inet data type in PostgreSQL represents an IPv4 or IPv6 network address. It can store both IP addresses and network ranges.

To create a column with the inet data type, you can use the following syntax:

CREATE TABLE my_table (
    ip_address inet
);

You can also specify a size for the inet column, which limits the maximum length of the stored IP address or network range. For example:

CREATE TABLE my_table (
    ip_address inet(32)
);

The above example specifies a maximum length of 32 characters for the IP address or network range.

Storing IP Addresses

To insert an IP address into an inet column, you can simply use a string representation of the IP address:

INSERT INTO my_table (ip_address) VALUES ('192.168.0.1');
INSERT INTO my_table (ip_address) VALUES ('2001:db8::1');

In the first example, we insert an IPv4 address (‘192.1’) into the ip_address column. In the second example, we insert an IPv6 address (‘2001:db8::1’). Both types of addresses are supported by PostgreSQL.

Selecting and Comparing IP Addresses

You can select and compare IP addresses stored in an inet column using various operators and functions.

For example, to select all rows with a specific IP address, you can use the = operator:

SELECT * FROM my_table WHERE ip_address = '192.1';

This query will return all rows where the ip_address column is equal to ‘192.1’.

You can also use range comparison operators, such as <, >, <=, and >=, to compare IP addresses or network ranges:

SELECT * FROM my_table WHERE ip_address >= '192.1';
SELECT * FROM my_table WHERE ip_address <> '10.0/8';

The first query will return all rows where the ip_address column is greater than or equal to ‘192. The second query will return all rows where the ip_address column is not equal to the network range ‘10.0/8’.

Subnet Masks and Network Addressing

The SUBNET MASKS are often used in combination with IP addresses to define network ranges.

In PostgreSQL, you can use the CIDR notation to specify IP addresses with subnet masks:

'192.1/24'
'2001:db8::/32'

The above examples represent an IPv4 network range with a subnet mask of 24 bits and an IPv6 network range with a subnet mask of 32 bits.

You can perform various operations on IP addresses and network ranges, such as calculating the network address, broadcast address, or checking if an IP address is within a specific network range.

Conclusion

The inet data type in PostgreSQL allows you to store and manipulate IP addresses and network ranges. It provides a convenient way to work with networking-related data in your database applications. By using the appropriate operators and functions, you can perform advanced querying and analysis on IP addresses stored in your database.

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