<table class="table">
  <thead>
    <tr>
      <th style="width:25%">Function</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>crc32(expr)</td>
      <td>Returns a cyclic redundancy check value of the `expr` as a bigint.</td>
    </tr>
    <tr>
      <td>hash(expr1, expr2, ...)</td>
      <td>Returns a hash value of the arguments.</td>
    </tr>
    <tr>
      <td>md5(expr)</td>
      <td>Returns an MD5 128-bit checksum as a hex string of `expr`.</td>
    </tr>
    <tr>
      <td>sha(expr)</td>
      <td>Returns a sha1 hash value as a hex string of the `expr`.</td>
    </tr>
    <tr>
      <td>sha1(expr)</td>
      <td>Returns a sha1 hash value as a hex string of the `expr`.</td>
    </tr>
    <tr>
      <td>sha2(expr, bitLength)</td>
      <td>Returns a checksum of SHA-2 family as a hex string of `expr`.
      SHA-224, SHA-256, SHA-384, and SHA-512 are supported. Bit length of 0 is equivalent to 256.</td>
    </tr>
    <tr>
      <td>xxhash64(expr1, expr2, ...)</td>
      <td>Returns a 64-bit hash value of the arguments. Hash seed is 42.</td>
    </tr>
  </tbody>
</table>
