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SQLµÄÓï·¨ - MS-SQL Server / »ù´¡Àà

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sql Óï¾ä - MS-SQL Server / ÒÉÄÑÎÊÌâ

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ÇóÒ»sqlÓï¾ä - MS-SQL Server / »ù´¡Àà

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a b c
cd ef ...
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a b c
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SQL GROUP BYÎÊÌâ - MS-SQL Server / »ù´¡Àà

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  create view grade_student(ѧºÅ,ÐÕÃû,Ñ¡¿ÎÃÅÊý,ƽ¾ù·Ö,×î¸ß·Ö,×îµÍ·Ö)
as
select sc.sno,sname,count(cno),avg(grade),max(grade),min(grade)
from sc,student 
where student.sno=sc.sno
group by sname,sc.sno
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SQL ÅÅÐòÎÊÌâ - MS-SQL Server / »ù´¡Àà

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id timeSpan
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2 20Ìì 01£º00£º00
3 100Ìì 01£º00£º00
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id timeSpan
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2 20Ìì 01£º00£º00
3 5Ìì 10£º00£º00
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SQL code:

--> ²âÊÔÊý¾Ý£º[TB]
if o ......

ÇóÒ»Sql - MS-SQL Server / Ó¦ÓÃʵÀý

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A B
712 010101
212 010101
321 010101
434 010101
523 010101
656 010101
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712 010101
212 010102
321 010103
434 010104
523 010105
656 010106
SQL code: ......
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