SQL Error: ORA-01861: literal does not match format string 01861

Question

I am trying to insert data into an existing table and keep receiving an error.

INSERT INTO Patient   (   PatientNo,   PatientFirstName,   PatientLastName,   PatientStreetAddress,   PatientTown,   PatientCounty,   PatientPostcode,   DOB,   Gender,   PatientHomeTelephoneNumber,   PatientMobileTelephoneNumber ) VALUES  (   121,    'Miles',    'Malone',    '64 Zoo Lane',    'Clapham',    'United Kingdom',   'SW4 9LP',   '1989-12-09',   'M',   02086950291,   07498635200 ); 

Error:

Error starting at line : 1 in command - INSERT INTO Patient (PatientNo,PatientFirstName,PatientLastName,PatientStreetAddress,PatientTown,PatientCounty,PatientPostcode,DOB,Gender,PatientHomeTelephoneNumber,PatientMobileTelephoneNumber) VALUES (121, 'Miles', 'Malone', '64 Zoo Lane', 'Clapham', 'United Kingdom','SW4 9LP','1989-12-09','M',02086950291,07498635200) Error report - SQL Error: ORA-01861: literal does not match format string 01861. 00000 -  "literal does not match format string" *Cause:    Literals in the input must be the same length as literals in            the format string (with the exception of leading whitespace).  If the            "FX" modifier has been toggled on, the literal must match exactly,            with no extra whitespace. *Action:   Correct the format string to match the literal. 

Just not sure why this keeps happening I am learning SQL at the moment, any help will be greatly appreciated!

Answer 1

Try replacing the string literal for date '1989-12-09' with TO_DATE('1989-12-09','YYYY-MM-DD')

Answer 2

The format you use for the date doesn't match to Oracle's default date format.

A default installation of Oracle Database sets the DEFAULT DATE FORMAT to dd-MMM-yyyy.

Either use the function TO_DATE(dateStr, formatStr) or simply use dd-MMM-yyyy date format model.