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【简答题】
在SQL Server 2008中，设某数据库中有商品表（商品号，商品名，进货价格），商品号为主码；销售表（商品号，销售时间，销售数量，销售价格，本次利润），商品号和销售时间为主码，销售价格为本次销售商品的单价。现要求每当在销售表中插入前4列数据时（假设一次只插入一行数据），系统自动计算本次销售产生的利润，并将该利润赋给销售表的第5列“本次利润”。请编写实现上述功能的后触发型触发器代码。（10分）
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举一反三
【单选题】What do the figures given in the third paragraph tell us?
A.
Americans are dependent on cars.
B.
Cars consume a lot of energy.
C.
Americans need to lose weight.
D.
Excess of fat can be a source of energy.
【单选题】--Fang yonggang was given___honour of being one of the 10 yearly figures in China. --That’s really ___great encouragement to those serving in the army. [ ]
A.
the；a
B.
a；a
C.
the； the
D.
不填；the
【单选题】All those youngesters will become ______ in ten years. ( )
A.
growns-ups
B.
growns-up
C.
grown-up
D.
grown-ups
【单选题】What is a limitation of the information contained in the table?
A.
It only covers U.S.-grown rice.
B.
It refers only to medium-grain rice.
C.
It describes the properties of raw rice.
D.
It is based on information provided by the rice.
【单选题】As his parents died when he was young, he was________by his uncle.
A.
brought up
B.
grown up
C.
brought out
D.
taken out
【简答题】你长大了,就不应该依靠你的父母。 Now that you are grown up, you should not .
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