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SQL_13.text
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SQL> set pages 200 lines 200;
SQL> SELECT TO_DATE('11/11/11','DD-MM-YY') FROM DUAL;
TO_DATE('
---------
11-NOV-11
SQL> SELECT TO_DATE('11-JAN-23','MM-DD-YY')
2 FROM DUAL;
SELECT TO_DATE('11-JAN-23','MM-DD-YY')
*
ERROR at line 1:
ORA-01858: a non-numeric character was found where a numeric was expected
SQL> SELECT TO_DATE('04-01-23','MM-DD-YY')
2 FROM DUAL;
TO_DATE('
---------
01-APR-23
SQL> SELECT TO_DATE('11-03-84','DD-MM-YY')
2 FROM DUAL;
TO_DATE('
---------
11-MAR-84
SQL> SELECT TO_DATE('23-11-23','MM-DD-YY') FROM DUAL;
SELECT TO_DATE('23-11-23','MM-DD-YY') FROM DUAL
*
ERROR at line 1:
ORA-01843: not a valid month
SQL> SELECT TO_DATE('11-11-34','MM-YY-DD') FROM DUAL;
SELECT TO_DATE('11-11-34','MM-YY-DD') FROM DUAL
*
ERROR at line 1:
ORA-01847: day of month must be between 1 and last day of month
SQL> SELECT TO_DATE(HIREDATE,'MM-DD-YY') FROM EMP;
SELECT TO_DATE(HIREDATE,'MM-DD-YY') FROM EMP
*
ERROR at line 1:
ORA-01843: not a valid month
SQL> SELECT TO_DATE(HIREDATE,'DD-MM-YY') FROM EMP;
TO_DATE(H
---------
17-DEC-80
20-FEB-81
22-FEB-81
02-APR-81
28-SEP-81
01-MAY-81
09-JUN-81
19-APR-87
17-NOV-81
08-SEP-81
23-MAY-87
03-DEC-81
03-DEC-81
23-JAN-82
14 rows selected.
SQL> SELECT SYSDATE FROM DUAL;
SYSDATE
---------
10-JUL-23
SQL> SELECT TO_DATE(SYSDATE,'DD-MM-YY') FROM DUAL;
TO_DATE(S
---------
10-JUL-23
SQL> SELECT TO_DATE(SYSDATE,'MM-DD-YY') FROM DUAL;
SELECT TO_DATE(SYSDATE,'MM-DD-YY') FROM DUAL
*
ERROR at line 1:
ORA-01858: a non-numeric character was found where a numeric was expected
SQL> SELECT HIREDATE FROM EMP;
HIREDATE
---------
17-DEC-80
20-FEB-81
22-FEB-81
02-APR-81
28-SEP-81
01-MAY-81
09-JUN-81
19-APR-87
17-NOV-81
08-SEP-81
23-MAY-87
03-DEC-81
03-DEC-81
23-JAN-82
14 rows selected.
SQL> SELECT TO_CHAR(HIREDATE,'YYYY') FROM EMP;
TO_C
----
1980
1981
1981
1981
1981
1981
1981
1987
1981
1981
1987
1981
1981
1982
14 rows selected.
SQL> SELECT TO_CHAR(HIREDATE,'MONTH')
2 FROM EMP;
TO_CHAR(H
---------
DECEMBER
FEBRUARY
FEBRUARY
APRIL
SEPTEMBER
MAY
JUNE
APRIL
NOVEMBER
SEPTEMBER
MAY
DECEMBER
DECEMBER
JANUARY
14 rows selected.
SQL> SELECT TO_CHAR(HIREDATE,'DAY')
2 FROM EMP;
TO_CHAR(H
---------
WEDNESDAY
FRIDAY
SUNDAY
THURSDAY
MONDAY
FRIDAY
TUESDAY
SUNDAY
TUESDAY
TUESDAY
SATURDAY
THURSDAY
THURSDAY
SATURDAY
14 rows selected.
SQL> SELECT TO_CHAR(HIREDATE,'HH:MI:SS')
2 FROM EMP;
TO_CHAR(
--------
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
12:00:00
14 rows selected.
SQL> SELECT TO_CHAR(HIREDATE,'DAY-DD-MONTH-YYYY')
2 FROM EMP;
TO_CHAR(HIREDATE,'DAY-DD-MO
---------------------------
WEDNESDAY-17-DECEMBER -1980
FRIDAY -20-FEBRUARY -1981
SUNDAY -22-FEBRUARY -1981
THURSDAY -02-APRIL -1981
MONDAY -28-SEPTEMBER-1981
FRIDAY -01-MAY -1981
TUESDAY -09-JUNE -1981
SUNDAY -19-APRIL -1987
TUESDAY -17-NOVEMBER -1981
TUESDAY -08-SEPTEMBER-1981
SATURDAY -23-MAY -1987
THURSDAY -03-DECEMBER -1981
THURSDAY -03-DECEMBER -1981
SATURDAY -23-JANUARY -1982
14 rows selected.
SQL> SELECT TO_CHAR(HIREDATE,'DD-MONTH-YY-HH:MI');
SELECT TO_CHAR(HIREDATE,'DD-MONTH-YY-HH:MI')
*
ERROR at line 1:
ORA-00923: FROM keyword not found where expected
SQL> SELECT TO_CHAR(HIREDATE,'DD-MONTH-YY-HH:MI')
2 FROM EMP;
TO_CHAR(HIREDATE,'DD-
---------------------
17-DECEMBER -80-12:00
20-FEBRUARY -81-12:00
22-FEBRUARY -81-12:00
02-APRIL -81-12:00
28-SEPTEMBER-81-12:00
01-MAY -81-12:00
09-JUNE -81-12:00
19-APRIL -87-12:00
17-NOVEMBER -81-12:00
08-SEPTEMBER-81-12:00
23-MAY -87-12:00
03-DECEMBER -81-12:00
03-DECEMBER -81-12:00
23-JANUARY -82-12:00
14 rows selected.
SQL> SELECT TO_CHAR('10-JUL-23','DAY') FROM DUAL;
SELECT TO_CHAR('10-JUL-23','DAY') FROM DUAL
*
ERROR at line 1:
ORA-01722: invalid number
SQL> SELECT TO_CHAR(SYSDATE,'DAY');
SELECT TO_CHAR(SYSDATE,'DAY')
*
ERROR at line 1:
ORA-00923: FROM keyword not found where expected
SQL> SELECT TO_CHAR(SYSDATE,'DAY')
2 FROM DUAL;
TO_CHAR(S
---------
MONDAY
SQL> SELECT TO_CHAR('10-JUL-2023','YYYY')
2 FROM DUAL;
SELECT TO_CHAR('10-JUL-2023','YYYY')
*
ERROR at line 1:
ORA-01722: invalid number
SQL> SELECT TO_CHAR(SYSDATE,'HH:MI:SS') FROM DUAL;
TO_CHAR(
--------
09:34:59
SQL> SELECT TO_CHAR(CURRENT_DATE,'YYYY') FROM DUAL;
TO_C
----
2023
SQL> SELECT TO_CHAR(CURRENT_DATE,'DAY')
2 FROM DUAL;
TO_CHAR(C
---------
MONDAY
SQL> SPOOL OFF;