Categories:

String & Binary Functions (Cryptographic Hash)

SHA1 , SHA1_HEX

Returns a 40-character hex-encoded string containing the 160-bit SHA-1 message digest.

These functions are synonymous.

Syntax

SHA1(<msg>)

SHA1_HEX(<msg>)

Arguments

msg

A string expression, the message to be hashed.

Usage Notes

• The SHA1 family of functions is provided primarily for backwards compatibility with other systems. For more secure encryption, Snowflake recommends using the SHA2 family of functions.

Examples

SELECT sha1('Snowflake');

------------------------------------------+
            SHA1('SNOWFLAKE')             |
------------------------------------------+
 fda76b0bcc1e87cf259b1d1e3271d76f590fb5dd |
------------------------------------------+

The data type of the output is string (VARCHAR) and can be stored in a VARCHAR column:

Create and fill a table:

CREATE TABLE sha_table(
    v VARCHAR, 
    v_as_sha1 VARCHAR,
    v_as_sha1_hex VARCHAR,
    v_as_sha1_binary BINARY,
    v_as_sha2 VARCHAR,
    v_as_sha2_hex VARCHAR,
    v_as_sha2_binary BINARY
    );
INSERT INTO sha_table(v) VALUES ('AbCd0');
UPDATE sha_table SET 
    v_as_sha1 = SHA1(v),
    v_as_sha1_hex = SHA1_HEX(v),
    v_as_sha1_binary = SHA1_BINARY(v),
    v_as_sha2 = SHA2(v),
    v_as_sha2_hex = SHA2_HEX(v),
    v_as_sha2_binary = SHA2_BINARY(v)
    ;

Here are the query and output:

SELECT v, v_as_sha1, v_as_sha1_hex
  FROM sha_table
  ORDER BY v;
+-------+------------------------------------------+------------------------------------------+
| V     | V_AS_SHA1                                | V_AS_SHA1_HEX                            |
|-------+------------------------------------------+------------------------------------------|
| AbCd0 | 9ddb991863d53b35a52c490db256207c776ab8d8 | 9ddb991863d53b35a52c490db256207c776ab8d8 |
+-------+------------------------------------------+------------------------------------------+