: This generates a 128-bit MD5 hash of the input string, returned as a varbinary value.
: Creating a non-obvious integer ID from a sensitive string. : This generates a 128-bit MD5 hash of
For the specific input '1455985476' , the MD5 hash is 792106533f84b730c64951a1ea702c78 . Converting the relevant portion of this hex value to a signed 32-bit integer results in: Common Use Cases : This generates a 128-bit MD5 hash of
: Selecting a deterministic but seemingly random subset of rows (e.g., WHERE ABS(HashConvert) % 10 = 0 for a 10% sample). : This generates a 128-bit MD5 hash of
The SQL expression you provided is a specific method used in SQL Server to generate a or "sharding key" from a string value (in this case, the string '1455985476' ). Breaking Down the Code