sql 2005 ²»Í¬Êý¾Ý¿âµÄÊý¾Ý±í¸´ÖÆ
sql 2005±íµÄ¸´ÖÆÓÐÁ½ÖÖ£ºÒ»ÖÖ¾ÍÊǰÑÕû¸ö±í¸´ÖƹýÈ¥£¬¾ÍºÃÏñ¸´ÖÆÎļþ²¢ÇÒÖØÃüÃû¡£±ðÍâÒ»ÖÖ¾ÍÊǰѱíµÄÄÚÈݸ´Öƹý³ö.
select * into newtable form oldtable;°Ñoldtabel¸´ÖƵ½newtableÇÒnewtable²»´æÔÚ,·ñÔò³ö´í.;
insert into newtable select * from oldtable°ÑoldtableµÄÄÚÈݲåÈëµ½newtable, newtableÒ»¶¨Òª´æÔÚ,²Å¿ÉÒÔ¸´ÖÆ.
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´ÓTable ±íÖÐÈ¡³öµÚ m Ìõµ½µÚ n ÌõµÄ¼Ç¼£º(Not In °æ±¾)
SELECT TOP n-m+1 *
from Table
WHERE (id NOT IN (SELECT TOP m-1 id from Table ))
--´ÓTABLE±íÖÐÈ¡³öµÚmµ½nÌõ¼Ç¼ (Exists°æ±¾)
SELECT TOP n-m+1 * from TABLE AS a WHERE Not Exists
(Select * from (Select Top m-1 * from TABLE orde ......
Student(S#,Sname,Sage,Ssex) ѧÉú±í
Course(C#,Cname,T#) ¿Î³Ì±í
SC(S#,C#,score) ³É¼¨±í
Teacher(T#,Tname) ½Ìʦ±í
ÎÊÌ⣺
1¡¢²éѯ“001”¿Î³Ì±È“002”¿Î³Ì³É¼¨¸ßµÄËùÓÐѧÉúµÄѧºÅ£»
select a.S# from (select s#,score from SC where C#='001') a,(select s#,score
fr ......
×·¼Ó£ºrow_number, rank, dese_rank, ntile
1. row_number: Ϊ²éѯ³öÀ´µÄÿһÐмǼÉú³ÉÒ»¸öÐòºÅ¡£
SELECT row_number() OVER(ORDER BY field) AS row_n
from tablename;
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with t_towtable
as (select row_number over(order by field1) as row_number from tb)
select * from t_rowtable where row_numbe ......
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create table tb(id varchar(3) , pid varchar(3) , name varchar(10))
insert into tb values('001' , null , '¹ã¶«Ê¡')
insert into tb values('002' , '001' , '¹ãÖÝÊÐ')
insert i ......
ÓÐʱÎÒÃÇ»áÏñÏÂÃæµÄÇé¿öÒ»Ñù£¬ÎªÖ÷±íµÄıһÌõ¼Ç¼£¬ÔÚÖмä±í(T_Stud_Course ±í)ÖÐͬʱ²åÈë¶àÌõÊý¾Ý
T_Student ±í
Stud_ID
Name
1
Tom
2
Jack
T_Course ±í
Course_ID
Course
1
Chinese
2
English
T_Stud_Course ±í
ID
Stud_ID
Course_ID
1
1
1
2
1
2
3
2
2
ÏÖÔÚÎÒÃÇ¿ÉÒÔÏÂÃæµÄ´æ´¢¹ý³ÌÀ ......