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SHA2

Calculates the SHA-2 family of hash functions (SHA-224, SHA-256, SHA-384, and SHA-512). If the hash length is not one of the permitted values, the return value is NULL. Otherwise, the function result is a hash value containing the desired number of bits as a string of hexadecimal digits.

Syntax​

sha2(expression, expression)

Arguments​

ArgumentsDescription
expressionThe string to be hashed.
expressionNumber to indicates the desired bit length of the result (224, 256, 384, 512, or 0 which is equivalent to 256).

Return Type​

A String data type.

Examples​

mysql> SELECT sha2('1234567890', 0);
+------------------------------------------------------------------+
| sha2('1234567890', 0)                                            |
+------------------------------------------------------------------+
| c775e7b757ede630cd0aa1113bd102661ab38829ca52a6422ab782862f268646 |
+------------------------------------------------------------------+
mysql> SELECT sha2('1234567890', 256);
+------------------------------------------------------------------+
| sha2('1234567890', 0)                                            |
+------------------------------------------------------------------+
| c775e7b757ede630cd0aa1113bd102661ab38829ca52a6422ab782862f268646 |
+------------------------------------------------------------------+

mysql> SELECT sha2('1234567890', 1); +-----------------------+ | sha2('1234567890', 1) | +-----------------------+ | NULL | +-----------------------+