Question

I am getting error while inserting a row in database.

Error: ORA-00917: missing comma

But there is no comma missing in my query.
Below is the query:

INSERT INTO Customer (NEED_BY_DATE) VALUES(‘|| ‘to_date(‘|| ””|| v_in_need_by_date|| ””|| ‘,’|| ””|| ‘MM-DD-YYYY’|| ””|| ‘)’|| ‘);

Answer 1

The quotes and pipes before to_date: ... VALUES('|| 'to_date... shouldn’t be there, || is used to concatenate strings and ‘ is not a string. Same thing goes on further.

I believe that you want something like:
INSERT INTO Customer (NEED_BY_DATE) VALUES(to_date(v_in_need_by_date));