Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

SqlÓï¾äʹÓà 50¸öʾÀý

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
  from SC where C#='002') b
  where a.score>b.score and a.s#=b.s#;
2¡¢²éѯƽ¾ù³É¼¨´óÓÚ60·ÖµÄͬѧµÄѧºÅºÍƽ¾ù³É¼¨£»
    select S#,avg(score)
    from sc
    group by S# having avg(score) >60;
3¡¢²éѯËùÓÐͬѧµÄѧºÅ¡¢ÐÕÃû¡¢Ñ¡¿ÎÊý¡¢×ܳɼ¨£»
  select Student.S#,Student.Sname,count(SC.C#),sum(score)
  from Student left Outer join SC on Student.S#=SC.S#
  group by Student.S#,Sname
4¡¢²éѯÐÕ“ÀÄÀÏʦµÄ¸öÊý£»
  select count(distinct(Tname))
  from Teacher
  where Tname like 'Àî%';
5¡¢²éѯûѧ¹ý“Ҷƽ”ÀÏʦ¿ÎµÄͬѧµÄѧºÅ¡¢ÐÕÃû£»
    select Student.S#,Student.Sname
    from Student 
    where S# not in (select distinct( SC.S#) from SC,Course,Teacher where  SC.C#=Course.C# and Teacher.T#=Course.T# and Teacher.Tname='Ҷƽ');
6¡¢²éѯѧ¹ý“001”²¢ÇÒҲѧ¹ý±àºÅ“002”¿Î³ÌµÄͬѧµÄѧºÅ¡¢ÐÕÃû£»
  select Student.S#,Student.Sname from Student,SC where Student.S#=SC.S# and SC.C#='001'and exists( Select * from SC as SC_2 where SC_2.S#=SC.S# and SC_2.C#='002');
7¡¢²éѯѧ¹ý“Ҷƽ”ÀÏʦËù½ÌµÄËùÓпεÄͬѧµÄѧºÅ¡¢ÐÕÃû£»
  select S#,Sname
  from Student
  where S# in (select S# from SC ,Course ,Teacher where SC.C#=Course.C# and Teacher.T#=Course.T# and Teacher.Tname='Ҷƽ' group by S# having count(SC.C#)=(select count(C#) from Course,Teacher  where Teacher.T#=Course.T# and Tname='Ҷƽ'));
8¡¢²éѯ¿Î³Ì±àºÅ“002”µÄ³É¼¨±È¿Î³Ì±àºÅ“001”¿Î³ÌµÍµÄËùÓÐͬѧµÄѧºÅ¡¢ÐÕÃû£»
  Select S#,Sname from (select Student.S#,Student.Sname,score ,(select score from SC


Ïà¹ØÎĵµ£º

Sql Server ×Ô動還Ô­½â決·½°¸

¸ù據ǰһƪ關ì¶×Ô動備·ÝµÄÎÄÕ£¬對應µÄ×Ô動還Ô­·½°¸
create procedure [dbo].[sp_RestoreDatabase]
@SourceDirBackupFiles NVARCHAR(200)
as
declare @DatabaseName sysname
--Table to hold the result from RESTORE HEADERONLY. Needed to get the database name o ......

ÍâÁ¬½ÓsqlµÄÒ»¸öÎÊÌâ

µ±ÔÚÄÚÁ¬½Ó²éѯÖмÓÈëÌõ¼þʱ£¬ÎÞÂÛÊǽ«Ëü¼ÓÈëµ½join×Ӿ䣬»¹ÊǼÓÈëµ½where×Ӿ䣬ÆäЧ¹ûÊÇÍêÈ«Ò»ÑùµÄ£¬µ«¶ÔÓÚÍâÁ¬½ÓÇé¿ö¾Í²»Í¬ÁË¡£µ±°ÑÌõ¼þ¼ÓÈëµ½ join×Ó¾äʱ£¬»á·µ»ØÍâÁ¬½Ó±íµÄÈ«²¿ÐУ¬È»ºóʹÓÃÖ¸¶¨µÄÌõ¼þ·µ»ØµÚ¶þ¸ö±íµÄÐС£Èç¹û½«Ìõ¼þ·Åµ½where×Ó¾äÖУ¬½«»áÊ×ÏȽøÐÐÁ¬½Ó²Ù×÷£¬È»ºóʹÓÃwhere×Ó¾ä¶ÔÁ¬½ÓºóµÄÐнøÐÐɸѡ¡ ......

sql »ù±¾²éѯÓï¾ä

SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE DATABASE database-name
2¡¢ËµÃ÷£ºÉ¾³ýÊý¾Ý¿â
drop database dbname ......

sql »ù±¾²éѯÓï¾ä

SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE DATABASE database-name
2¡¢ËµÃ÷£ºÉ¾³ýÊý¾Ý¿â
drop database dbname ......

ÈçºÎ´ÓEXPDPµ¼³öµÄÎļþÀï»ñµÃÓû§ÊÚȨµÄSQLÓï¾ä


ÈçºÎ´ÓEXPDPµ¼³öµÄÎļþÀï»ñµÃÓû§ÊÚȨµÄSQLÓï¾ä 
 
´òËãǨÒÆһϵͳ£¬ÓÉÓÚÊÇ¿çƽ̨µÄǨÒÆ£¬RMANÊDz»ÄÜÓÃÁË£¬¿¼ÂÇʹÓÃEXPDP/IMPDPÀ´½øÐе¼Èëµ¼³ö£¬µ¼Èë¹ý³Ì·¢ÏÖN¶àÓû§µÄȨÏÞ¸ã³öÁË£¬Âé·³Öص¼ÊÇ¿ÉÒÔ»¨Ê±¼äÌ«³¤£¬Ñо¿ÁËһϣ¬Éú³ÉÁËÈ«²¿µÄSQLµÄ½Å±¾¡£
impdp system/manager schemas=user DIRECTORY=DUMP_FILES ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ