날짜 유효성 검사(xquery 사용)
WITH T AS ( SELECT '2009o209' DT FROM DUAL UNION ALL SELECT '20000229' FROM DUAL UNION ALL SELECT '20010229' FROM DUAL UNION ALL SELECT '20100229' FROM DUAL UNION ALL SELECT '21000229' FROM DUAL UNION ALL SELECT '28000229' FROM DUAL UNION ALL SELECT '40000229' FROM DUAL ) SELECT T.*, A.* FROM T, XMLTABLE('if (. castable as xs:date) then xs:string(.) else ()' PASSING REGEXP_REPLACE(T.DT,'[^0-9]','') ) A ;
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