ORA-01843 not a valid month- Comparing Dates

Question

I have a problem when try to select data from a table filtering by date.

For example:

SELECT * FROM MYTABLE WHERE MYTABLE.DATEIN = \'23         


        

Answer 1

I know this is a bit late, but I'm having a similar issue. SQL*Plus executes the query successfully, but Oracle SQL Developer shows the ORA-01843: not a valid month error.

SQL*Plus seems to know that the date I'm using is in the valid format, whereas Oracle SQL Developer needs to be told explicitly what format my date is in.

• SQL*Plus statement:

  select count(*) from some_table where DATE_TIME_CREATED < '09-12-23';
  

VS

• Oracle SQL Developer statement:

   select count(*) from some_table where DATE_TIME_CREATED < TO_DATE('09-12-23','RR-MM-DD');