【多选题】
A <{p}>TO_NUMBER(PROMO_ BEGIN_DATE) - 5 will return number<{br/}><{/p}>
B <{p}>TO_DATE(PROMO_BEGIN_DATE * 5) will return a date<{br/}><{/p}>
C <{p}>PROMO_BEGIN_DATE - SYSDATE will return a number.<{br/}><{/p}>
D <{p}>PROMO_BEGIN_DATE - 5 will return a date.<{br/}><{/p}>
E <{p}>PROMO_BEGIN_DATE - SYSDATE will return an error.<{br/}><{/p}>
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