Oracle PL/SQL/Date Timezone/numtoyminterval

Add any number of months to hired date

  
SQL> CREATE TABLE EMP(
  2      EMPNO NUMBER(4) NOT NULL,
  3      ENAME VARCHAR2(10),
  4      JOB VARCHAR2(9),
  5      MGR NUMBER(4),
  6      HIREDATE DATE,
  7      SAL NUMBER(7, 2),
  8      COMM NUMBER(7, 2),
  9      DEPTNO NUMBER(2)
 10  );
Table created.
SQL>
SQL> INSERT INTO EMP VALUES(7369, "SMITH", "CLERK", 7902,TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(7499, "ALLEN", "SALESMAN", 7698,TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7521, "WARD", "SALESMAN", 7698,TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7566, "JONES", "MANAGER", 7839,TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES(7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES(7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES(7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), 1300, NULL, 10);
1 row created.
SQL>
SQL>
SQL> select ename, hiredate, hiredate +
  2         numtoyminterval(250,"month") "250 Months" from emp;
ENAME      HIREDATE  250 Month
---------- --------- ---------
SMITH      17-DEC-80 17-OCT-01
ALLEN      20-FEB-81 20-DEC-01
WARD       22-FEB-81 22-DEC-01
JONES      02-APR-81 02-FEB-02
MARTIN     28-SEP-81 28-JUL-02
BLAKE      01-MAY-81 01-MAR-02
CLARK      09-JUN-81 09-APR-02
SCOTT      09-DEC-82 09-OCT-03
KING       17-NOV-81 17-SEP-02
TURNER     08-SEP-81 08-JUL-02
ADAMS      12-JAN-83 12-NOV-03
ENAME      HIREDATE  250 Month
---------- --------- ---------
JAMES      03-DEC-81 03-OCT-02
FORD       03-DEC-81 03-OCT-02
MILLER     23-JAN-82 23-NOV-02
14 rows selected.
SQL> drop table emp;
Table dropped.
SQL>

numtoyminterval(100000, "YEAR")

 
SQL>
SQL> select numtoyminterval(100000, "YEAR") from dual;
NUMTOYMINTERVAL(100000,"YEAR")
---------------------------------------------------------------------------
+000100000-00
SQL>

NUMTOYMINTERVAL(3.25, "MONTH")

 

SQL> select NUMTOYMINTERVAL(3.25, "MONTH") from dual;
NUMTOYMINTERVAL(3.25,"MONTH")
---------------------------------------------------------------------------
+000000000-03
SQL>

NUMTOYMINTERVAL(x): Convert the number x to an INTERVAL YEAR TO MONTH

 
SQL>
SQL> -- NUMTOYMINTERVAL(x): Convert the number x to an INTERVAL YEAR TO MONTH.
SQL>
SQL> select numtoyminterval(100000000, "MONTH") from dual;
NUMTOYMINTERVAL(100000000,"MONTH")
---------------------------------------------------------------------------
+008333333-04
SQL>

NUMTOYMINTERVAL(x, interval_unit): convert the number x to an INTERVAL YEAR TO MONTH with the interval for x supplied in interval_unit

 

SQL> --NUMTOYMINTERVAL(x, interval_unit): convert the number x to an INTERVAL YEAR TO MONTH with the interval for x supplied in interval_unit
SQL>
SQL> SELECT NUMTOYMINTERVAL(1.5, "YEAR") FROM dual;
NUMTOYMINTERVAL(1.5,"YEAR")
---------------------------------------------------------------------------
+000000001-06
SQL>