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select * from [production].[product] where color in ('red','blue','black')查看全部
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select stuid,stuname,avg(stuscore) as maxscore from student where stuid is not null group by stuid,stuname having maxscore>60 order by maxscore desc查看全部
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attahe查看全部
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attch查看全部
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關系型數據庫查看全部
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field查看全部
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er圖查看全部
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er圖查看全部
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in,是指某個字段在某個域里。 not in,是指某個字段不在某個域里。查看全部
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通配符: %,表示可以沒有或者有若干字符的模糊查詢。 _,表示可以沒有或者有一個字符的模糊查詢。查看全部
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select...From...查看全部
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How to change data type?查看全部
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What is the T-SQL? It is used to answer question that can help the decision makers to make batter business;查看全部
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Foreign key fields in a table that refer to the primary key in another table;查看全部
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Each table can have one or more fileds as primary key;查看全部
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