Problem inserting into table in oracle using PopSQL - sql

Question

The problem i'm having is that using PopSQL, when i insert something into a table it says success but then it inserts nothing into the table by saying 0 rows affected and i can't figure out what is the problem because PopSQL works fine with postgres and Mysql. Any help is much appreciated.
CREATE TABLE employees
(
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(30) NOT NULL,
last_name VARCHAR2(30) NOT NULL,
hire_date DATE NOT NULL,
salary NUMBER(8,2) NOT NULL
);
INSERT INTO EMPLOYEES VALUES (100, 'Malik', 'Makkes', '01-JAN-2010', 9000);
COMMIT;
SELECT * FROM employees;

Answer 1

Seem a Sys error to me
Try this :
INSERT INTO employees (employee_id, first_name, last_name, hire_date, salary)
VALUES (100, 'Malik', 'Makkes', '01-JAN-2010', 9000);
COMMIT;
SELECT * FROM employees;
Make sure to change the VALUES clause to match the correct number of columns and data types in the employees table.

Answer 2

As Jonas commented, "date" value (string, actually; you just enclosed some digits and letters into single quotes) looks suspicious. Read his comment once again.
I'm in Croatia. Let's see what happens in my database.
SQL> CREATE TABLE employees
2 (
3 employee_id NUMBER PRIMARY KEY,
4 first_name VARCHAR2(30) NOT NULL,
5 last_name VARCHAR2(30) NOT NULL,
6 hire_date DATE NOT NULL,
7 salary NUMBER(8,2) NOT NULL
8 );
Table created.
SQL> INSERT INTO EMPLOYEES VALUES (100, 'Malik', 'Makkes', '01-JAN-2010', 9000);
INSERT INTO EMPLOYEES VALUES (100, 'Malik', 'Makkes', '01-JAN-2010', 9000)
*
ERROR at line 1:
ORA-01858: a non-numeric character was found where a numeric was expected
Error; can't say I didn't expect it. What does default NLS value (in my database) say about dates?
SQL> select sysdate right_now,
2 to_char(sysdate, 'dd-mon-yyyy') another_Format
3 from dual;
RIGHT_NOW ANOTHER_FORMAT
---------- --------------------
04.02.2023 04-vel-2023
SQL>
Right; format doesn't match, nor does the language. How to fix it?
One option is to use date literal instead of a string:
SQL> INSERT INTO EMPLOYEES VALUES (100, 'Malik', 'Makkes', date '2010-01-01', 9000);
1 row created.
SQL> select * from employees;
EMPLOYEE_ID FIRST_NAME LAST_NAME HIRE_DATE SALARY
----------- --------------- --------------- ---------- ----------
100 Malik Makkes 01.01.2010 9000
SQL>
That works. Another option is to use to_date function with appropriate format model:
SQL> INSERT INTO EMPLOYEES VALUES (100, 'Malik', 'Makkes',
2 to_date('01-jan-2010', 'dd-mon-yyyy', 'nls_date_language = english'), 9000);
1 row created.
SQL> select * from employees;
EMPLOYEE_ID FIRST_NAME LAST_NAME HIRE_DATE SALARY
----------- --------------- --------------- ---------- ----------
100 Malik Makkes 01.01.2010 9000
SQL>
That works too. Yet another option is to alter your session (or, if you must, NLS settings for the whole database, but for that you'll need to talk to your DBA):
SQL> alter session set nls_date_format = 'dd-mon-yyyy';
Session altered.
SQL> alter session set nls_date_language = 'english';
Session altered.
SQL> INSERT INTO EMPLOYEES VALUES (100, 'Malik', 'Makkes', '01-JAN-2010', 9000);
1 row created.
SQL> select * from employees;
EMPLOYEE_ID FIRST_NAME LAST_NAME HIRE_DATE SALARY
----------- --------------- --------------- ----------- ----------
100 Malik Makkes 01-jan-2010 9000
SQL>
Works again.
Now you've seen a few valid ways to insert date value into a date datatype column. Pick one you find the most appropriate. My choice would be a date literal.
On the other hand, if that's not the issue, provide more info (illustrate execution of your code; post exact error you got).