Hashing functions are used to hash the input value.
md5(col)
Return md5 hashed value of the argument.
sha1(col)
Return sha1 hashed value of the argument.
sha256(col)
Return sha256 hashed value of the argument.
sha384(col)
Return sha384 hashed value of the argument.
sha512(col)
Return sha512 hashed value of the argument.