上季度所有月份:

SELECT TO_CHAR(ADD_MONTHS(ADD_MONTHS(TRUNC(SYSDATE, 'YYYY'),A * 3),-ROWNUM),'YYYYMM')  LAST_Q  
    FROM (SELECT TO_CHAR(SYSDATE,'Q')-1 A FROM DUAL)  
    CONNECT BY ROWNUM <= 3  
    ORDER BY 1;  

本季度所有月份:

SELECT TO_CHAR(ADD_MONTHS(ADD_MONTHS(TRUNC(SYSDATE, 'YYYY'),A * 3),-ROWNUM),'YYYYMM')  LAST_Q  
    FROM (SELECT TO_CHAR(SYSDATE,'Q') A FROM DUAL)  
    CONNECT BY ROWNUM <= 3  
    ORDER BY 1;  

小鱼儿
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