1. Oracle Academy
Conversion Functions

2. Conversion Functions

3. Conversion Functions Date -> Char
TO_CHAR (data, 'format')
Cuvintele dintre ghilimele in format sunt inserate in sirul afisat exact cum apar
Spatiile ce apar informat sunt reproduse in rezultatul afisat
fm – elimina spatiile sau zerourile nesemnificative
SELECT to_char(sysdate,'dd "din luna" mm "a anului" YYYY')
=> 10 din luna 03 a anului 2006
SELECT to_char(sysdate,'fmdd "din luna" mm "a anului" YYYY')
=> 10 din luna 3 a anului 2006

4. Conversion Functions Date -> Char
YYYY
Select to_char(sysdate,'dd-mon-YyYy') from dual
=> 10-mar-2006 YY
Select to_char(sysdate,'dd-mon-YY') from dual
=> 10-mar-06 Y
Select to_char(sysdate,'dd-mon-Y') from dual
=> 10-mar-6
YEAR
Select to_char(sysdate,'dd-mon-Year') from dual
=> 10-mar-Two Thousand Six
Select to_char(sysdate,'dd-mon-YEAR') from dual
=> 10-mar-TWO THOUSAND SIX

5. Conversion Functions Date -> CharMM
Select to_char(sysdate,'dd-mm-YYYY') from dual
=>
Select to_char(sysdate,'fmdd-mm-YYYY') from dual
=>
MON
Select to_char(sysdate,'dd-mon-YYYY') from dual
=> 10-mar-2006
Select to_char(sysdate,'dd-MON-YYYY') from dual
=> 10-MAR-2006
Select to_char(sysdate,'dd-Mon-YYYY') from dual
=> 10-Mar-2006

6. Conversion Functions Date -> Char
MONTH
Select to_char(sysdate,'dd-month-YYYY') from dual
=> 10-march-2006
Select to_char(sysdate,'dd-MONTH-YYYY') from dual
=> 10-MARCH-2006
Select to_char(sysdate,'dd-Month-YYYY') from dual
=> 10-March-2006

7. Conversion Functions Date -> Char
SP – se poate combina cu YYY, DD, MM, HH, MI
Select to_char(sysdate,'dd-mm-YYYY') from dual
=>
Select to_char(sysdate,'ddsp-mm-YYYY') from dual
=> ten
Select to_char(sysdate,'ddspth-mm-YYYY') from dual
=> tenth
Select to_char(sysdate-7,'ddspth-mm-YYYY') from dual
=> third

8. Conversion Functions Date -> Char
DD - ziua din luna (1..31)
Select to_char(sysdate,'dd-mm-YYYY') from dual
=>
DDth DDTH (the spell is set by DD not the TH)
Select to_char(sysdate,'DDth-mm-YYYY') from dual
=> 10TH
Ddth DdTH
Select to_char(sysdate,'DdTH-mm-YYYY') from dual
=> 10Th
ddth ddTH
Select to_char(sysdate,'ddTH-mm-YYYY') from dual
=> 10th

9. Conversion Functions Date -> Char
D – ziua din saptamana (1..7)
Select to_char(sysdate,'d-mm-YYYY') from dual
=>
DAY
Select to_char(sysdate,'Day, dd-mm-YYYY') from dual
=> Friday,
DY – abrevierea cu trei caractere
Select to_char(sysdate,'DY, dd-mm-YYYY') from dual
=> FRI,
DDD – ziua din an (1..366)
Select to_char(sysdate,'ddd "of" YYYY') from dual
=> 69 of 2006

10. Conversion Functions Char -> Date
TO_DATE('data', 'format')
Se folosesc aceleasi formate ca si la TO_CHAR cu urmatoarele restrictii:
Nu se pot folosi siruri incluse intre ghilimele:
SELECT to_date('10 of March 2006','dd "of" March, YYYY')
=> eroare!
Zilele nu pot fi scrise cu litere, trebuie sa fie numere
SELECT to_date('Ten March 2006','Ddsp March, YYYY')

11. RR and YY format

12. RR and YY format Select TO_CHAR(TO_DATE('01-01-97','dd-mm-yy'),'YYYY')
=>
Select TO_CHAR(TO_DATE(' ','dd-mm-rr'),'RRR')
Select TO_CHAR(TO_DATE(' ','dd-mm-rr'),'YYYY')
Select TO_CHAR(TO_DATE(' ','dd-mm-yy'),'RRR')