postgresqlHow do I use the PostgreSQL hash function?

The PostgreSQL HASH function is a cryptographic hash function used to generate a hash value from a string of text. It is used to generate a unique value from a given string of data which can be used to identify a record or verify data integrity.

Example

SELECT HASH('Hello World');

## Output example

7e9d4a6bcef9f9e2f3a9d9a3f6f6f1f2

The HASH function takes a single argument, which is the string of text to be hashed. In this example, the string 'Hello World' is hashed. The output is a 32 character hexadecimal string.

The HASH function is also available in other languages, such as C, Java, and Python.

Parts of the code:

• SELECT: The keyword used to select data from a table.
• HASH: The PostgreSQL function used to generate a hash value from a string of text.
• 'Hello World': The argument passed to the HASH function, which is the string of text to be hashed.

Helpful links

• PostgreSQL Documentation: HASH
• PostgreSQL Hashing Tutorial

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