sha2 function
Applies to:  Databricks SQL 
 Databricks Runtime
Returns a checksum of the SHA-2 family as a hex string of expr.
Syntax
sha2(expr, bitLength)
Arguments
- expr: A- BINARYor- STRINGexpression.
- bitLength: An- INTEGERexpression.
Returns
A STRING.
bitLength can be 0, 224, 256, 384, or 512.
bitLength 0 is equivalent to 256.
Examples
SQL
>> SELECT sha2('Spark', 256);
  529bc3b07127ecb7e53a4dcf1991d9152c24537d919178022b2c42657f79a26b