SELECT TO_CHAR(TO_DATE(TO_CHAR(SYSDATE, 'YYYY-MM'), 'YYYY-MM') + (ROWNUM - 1) ,'YYYY-MM-DD') DAY_ID
FROM DUAL
CONNECT BY ROWNUM <= TO_NUMBER(TO_CHAR(sysdate,'DD')) ;
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SELECT TO_CHAR(TO_DATE(TO_CHAR(SYSDATE, 'YYYY-MM'), 'YYYY-MM') + (ROWNUM - 1) ,'YYYY-MM-DD') DAY_ID
FROM DUAL
CONNECT BY ROWNUM <= TO_NUMBER(TO_CHAR(sysdate,'DD')) ;