Question

Oracle SQL Developer complains about next SQL though I can’t seem to find the reason:

IF to_number(to_char(sysdate, 'HH24')) > 6 THEN
  IF to_number(to_char(sysdate, 'HH24')) < 9 THEN
    SELECT 1 FROM dual;
  ELSE
    SELECT (CASE WHEN result = 'SUCCESS' THEN 1 ELSE 0 END) FROM t_job WHERE to_char(start_time, 'yyyy/mm/dd') = to_char(sysdate, 'yyyy/mm/dd');
  END IF;
ELSE
    SELECT (CASE WHEN result = 'SUCCESS' THEN 1 ELSE 0 END) FROM t_job WHERE to_char(start_time, 'yyyy/mm/dd') = to_char(sysdate, 'yyyy/mm/dd');
END IF;

What’s the mistake in provided query?

Error report:

Error starting at line 7 in command:
ELSE
Error report:
Unknown Command
(CASEWHENRESULT='SUCCESS'THEN1ELSE0END) 
--------------------------------------- 
1                                       


Error starting at line 9 in command:
END IF
Error report:
Unknown Command

Answer 1

There are a couple of problems with your code (which is PL/SQL, not just SQL):

1) You are missing the begin and end around the block.

2) Your selects need an into clause

try:

DECLARE
  l_result number;
BEGIN
  IF to_number(to_char(sysdate, 'HH24')) > 6 THEN
    IF to_number(to_char(sysdate, 'HH24')) < 9 THEN
      SELECT 1 INTO l_result FROM dual;
    ELSE
      SELECT (CASE WHEN result = 'SUCCESS' THEN 1 ELSE 0 END) 
       INTO l_result 
       FROM t_job WHERE to_char(start_time, 'yyyy/mm/dd') = to_char(sysdate, 'yyyy/mm/dd');
    END IF;
  ELSE
      SELECT (CASE WHEN result = 'SUCCESS' THEN 1 ELSE 0 END) 
       INTO l_result 
       FROM t_job WHERE to_char(start_time, 'yyyy/mm/dd') = to_char(sysdate, 'yyyy/mm/dd');
  END IF;
  dbms_output.put_line('result is '||l_result);
END;