SELECT to_number(null), to_char(null), to_number(null), to_char(null), to_number(null), to_char(null), to_number(null), to_char(null), to_number(null), to_char(null), to_number(null), to_char(null), to_date(null), to_number(null), to_number(null), to_number(null), to_char(null), to_number(null), to_char(null) from dual where 1 = 2
SELECT TO_NUMBER(NULL)
, TO_CHAR(NULL)
, TO_NUMBER(NULL)
, TO_CHAR(NULL)
, TO_NUMBER(NULL)
, TO_CHAR(NULL)
, TO_NUMBER(NULL)
, TO_CHAR(NULL)
, TO_NUMBER(NULL)
, TO_CHAR(NULL)
, TO_NUMBER(NULL)
, TO_CHAR(NULL)
, TO_DATE(NULL)
, TO_NUMBER(NULL)
, TO_NUMBER(NULL)
, TO_NUMBER(NULL)
, TO_CHAR(NULL)
, TO_NUMBER(NULL)
, TO_CHAR(NULL)
FROM DUAL
WHERE 1 = 2
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