DECLARE M_DATE1 DATE; M_VARCHAR2 VARCHAR2(30) := '5'; M_INTO1 VARCHAR2(50); M_INTO2 VARCHAR2(50); M_INTO3 VARCHAR2(50); M_INTO4 VARCHAR2(50); M_INTO5 VARCHAR2(50); -- M_INTO6 VARCHAR2(50); M_INTO7 VARCHAR2(50); M_INTO8 VARCHAR2(50); BEGIN SELECT ADD_MONTHS(DATE '2015-01-01', -2) INTO M_DATE1 FROM DUAL; DBMS_OUTPUT.put_line(TO_CHAR(M_DATE1, 'YYYY-MM-DD')); --SELECT ADD_MONTHS((M_DATE1 + M_VARCHAR2 - 1), -1) INTO M_INTO1 FROM DUAL; SELECT TO_CHAR(ADD_MONTHS((M_DATE1 + M_VARCHAR2 - 1), -1), 'YYYY-MM-DD') INTO M_INTO1 FROM DUAL; DBMS_OUTPUT.put_line(M_INTO1); IF TO_NUMBER(TO_CHAR(SYSDATE, 'DD')) = 19 THEN DBMS_OUTPUT.put_line('1号'); END IF; SELECT TO_CHAR(SYSDATE - 5, 'YYYY-MM-DD HH24:MM:SS') INTO M_INTO2 FROM DUAL; SELECT TO_DATE('2014-06-10 12:05:22', 'YYYY-MM-DD HH24:MI:SS') INTO M_INTO3 FROM DUAL; /* SELECT TRUNC(ADD_MONTHS(SYSDATE, -1), 'MM') FIRST_DAY LAST_DAY(ADD_MONTHS(SYSDATE, -1)) LAST_DAY FROM DUAL;*/ -- SELECT TRUNC(ADD_MONTHS(SYSDATE, -1), 'MM') INTO M_INTO4 FROM DUAL; -- SELECT LAST_DAY(ADD_MONTHS(SYSDATE, -1)) LAST_DAY INTO M_INTO5 FROM DUAL; --上月第一天 SELECT TO_CHAR(TRUNC(ADD_MONTHS(SYSDATE, -1), 'MM'), 'YYYY-MM-DD') INTO M_INTO4 FROM DUAL; --上月最后一天 SELECT TO_CHAR(LAST_DAY(ADD_MONTHS(SYSDATE, -1)), 'YYYY-MM-DD') INTO M_INTO5 FROM DUAL; --本月第一天 SELECT TO_CHAR(TRUNC(ADD_MONTHS(SYSDATE, 0), 'MM'), 'YYYY-MM-DD') INTO M_INTO4 FROM DUAL; --上一年的第一天 SELECT TO_CHAR(TRUNC(ADD_MONTHS(SYSDATE, -1), 'YY'), 'YYYY-MM-DD') INTO M_INTO4 FROM DUAL; DBMS_OUTPUT.put_line(TRUNC(ADD_MONTHS(SYSDATE, -1), 'MM')); DBMS_OUTPUT.put_line(M_INTO4); DBMS_OUTPUT.put_line(M_INTO5); --加减时间练习 SELECT TO_CHAR(DATE '2015-01-01' - 1, 'YYYY-MM-DD') INTO M_INTO6 FROM DUAL; SELECT TO_CHAR(TO_DATE('2015-02-01 15:14:21', 'yyyy-MM-dd HH24:mi:ss') - 1, 'YYYY-MM-DD') INTO M_INTO7 FROM DUAL; SELECT TO_CHAR(TO_DATE('2015-02-01 15:14:21', 'yyyy-MM-dd HH24:mi:ss') - 1, 'YYYY-MM-DD HH24:mi:ss') INTO M_INTO8 FROM DUAL; END;
Oracle ADD_MONTHS Test(01)
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转载自xinjiatao.iteye.com/blog/2181032
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