altarek 0 Light Poster

i have mysql xml field like this

<?xml version="1.0" encoding="UTF-8"?>
<record
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 
    xmlns="http://www.loc.gov/MARC21/slim">
 
  <leader>00764nas </leader>
  <controlfield tag="221">011258</controlfield>
 
  <datafield tag="578" ind1=" " ind2=" ">
    <subfield code="a">jaun</subfield>
  </datafield>
  <datafield tag="356" ind1=" " ind2=" ">
    <subfield code="a"></subfield>
    <subfield code="c"></subfield>
  </datafield>
  <datafield tag="333" ind1=" " ind2=" ">
    <subfield code="d">ali</subfield>
    <subfield code="p">22</subfield>
  </datafield>
  <datafield tag="222" ind1=" " ind2=" ">
    <subfield code="c"></subfield>
    <subfield code="d">1984</subfield>
  </datafield>
 
</record>

i don't know how to apply SELECT ExtractValue at this field?