HASH_SHA256

Purpose

This function computes a hash value by using the SHA256 algorithm (256 Bit).

Syntax

hash_sha256::=

Usage Notes

  • Return values have data type CHAR(64) and contain hex characters.
  • The data types of the input parameters are significant. That is why HASH_SHA256(123) is different from HASH_SHA256('123').
  • Multiple input expressions are concatenated (in their internal byte representation) before the hash value is computed.

    • HASH_SHA256(c1,c2) is not similar to HASH_SHA256(c1||c2).

  • The function returns NULL if all input expressions are NULL.

Example

SELECT HASH_SHA256('abc');