<query id="updateClearCoverImage" action="update">
    <tables>
        <table name="files" />
    </tables>
    <columns>
        <column name="cover_image" default="N" notnull="notnull" />
    </columns>
    <conditions>
        <condition operation="equal" column="upload_target_srl" var="upload_target_srl" notnull="notnull" />
        <condition operation="equal" column="cover_image" default="Y" notnull="notnull" pipe="and" />
        <condition operation="notequal" column="file_srl" var="cover_file_srl" pipe="and" />
    </conditions>
</query>
