SQL Server£º¶¨Ê±×÷ÒµµÄÉèÖ÷½·¨
¡¾×ª¡¿http://space.cnblogs.com/group/topic/33473/
http://www.cnblogs.com/ghd258/archive/2005/10/24/260836.html
Èç¹ûÔÚSQL Server ÀïÐèÒª¶¨Ê±»òÕßÿ¸ôÒ»¶Îʱ¼äÖ´ÐÐij¸ö´æ´¢¹ý³Ì»ò3200×Ö·ûÒÔÄÚµÄSQLÓï¾äʱ,¿ÉÒÔÓùÜÀí->SQL Server´úÀí->×÷ÒµÀ´ÊµÏÖ¡£
¡¡¡¡1¡¢¹ÜÀí->SQL Server´úÀí->×÷Òµ(°´Êó±êÓÒ¼ü)->н¨×÷Òµ->
¡¡¡¡2¡¢Ð½¨×÷ÒµÊôÐÔ(³£¹æ)->Ãû³Æ[×Ô¶¨Òå±¾´Î×÷ÒµµÄÃû³Æ]->ÆôÓõķ½¿òÄÚÊǹ´ºÅ->
¡¡¡¡·ÖÀà´¦¿ÉÑ¡ÔñÒ²¿ÉÓÃĬÈϵÄ[δ·ÖÀà(±¾µØ)]->ËùÓÐÕßĬÈÏΪµÇ¼SQL ServerÓû§[Ò²¿ÉÑ¡ÆäËüµÄµÇ¼]->
¡¡¡¡ÃèÊö[Ìîд±¾´Î¹¤×÷ÏêϸÃèÊöÄÚÈÝ]£»
¡¡¡¡[ ´´½¨×÷Òµ·ÖÀàµÄ²½Öè:
¡¡¡¡ SQL Server´úÀí->×÷Òµ->ÓÒ¼üÑ¡ËùÓÐÈÎÎñ->Ìí¼Ó¡¢Ð޸ġ¢É¾³ý ]
¡¡¡¡3¡¢Ð½¨×÷ÒµÊôÐÔ(²½Öè)->н¨->²½ÖèÃû[×Ô¶¨ÒåµÚÒ»²½ÖèÃû³Æ]->ÀàÐÍ[Transact-SQL(TSQL)½Å±¾]->
¡¡¡¡ Êý¾Ý¿â[Òª²Ù×÷µÄÊý¾Ý¿â]->ÃüÁî
[ Èç¹ûÊǼòµ¥µÄSQLÖ±½Óд½øÈ¥¼´¿É£¬Ò²¿ÉÓôò¿ª°´Å¥ÊäÈëÒ»¸öÒÑдºÃµÄ*.sqlÎļþ
Èç¹ûÒªÖ´Ðд洢¹ý³Ì£¬Ìî
exec p_procedure_name v_parameter1,[ v_parameter2…v_parameterN]
]
->È·¶¨
(Èç¹ûÓжà¸ö²½Ö裬¿ÉÒÔÔٴε÷ÓÃÏÂÃæµÄн¨°´Å¥£»Ò²¿ÉÒÔ¶ÔÒÑÓеĶà¸ö²½Öè²åÈë¡¢±à¼¡¢É¾³ý)£»
¡¡¡¡4¡¢½¨×÷ÒµÊôÐÔ(µ÷¶È)->н¨µ÷¶È->Ãû³Æ[×Ô¶¨Òåµ÷¶ÈÃû³Æ]->ÆôÓõķ½¿òÄÚÊǹ´ºÅ->µ÷¶È->·´¸´³öÏÖ->
¸ü¸Ä[µ÷¶Èʱ¼ä±í]->È·¶¨
(Èç¹ûÖ»Òª±£´æ´Ë×÷Òµ£¬²»Òª¶¨Ê±×ö¿ÉÒÔ°ÑÆôÓõķ½¿òÄÚÊǹ´ºÅÈ¥µô)£»
¡¡¡¡5¡¢½¨×÷ÒµÊôÐÔ(֪ͨ)->ÓÃĬÈϵÄ֪ͨ·½·¨¾ÍºÃ[µ±×÷ҵʧ°Üʱ£¬Ð´ÈëWindowsÓ¦ÓóÌÐòϵͳÈÕÖ¾] ->È·¶¨¡£
¡¡¡¡¸ú×÷ÒµÖ´ÐÐÏà¹ØµÄһЩSQL Server֪ʶ£º
¡¡¡¡SQLSERVERAGENT·þÎñ±ØÐëÕý³£ÔËÐУ¬Æô¶¯ËüµÄNTµÇ¼Óû§Òª¸úÆô¶¯SQL ServerÊý¾Ý¿âµÄNTµÇ¼Óû§Ò»Ö¡£
¡¡¡¡µã×÷ÒµÓÒ¼ü¿ÉÒԲ鿴×÷ÒµÖ´ÐеÄÀúÊ·¼Ç¼Çé¿ö£¬Ò²¿ÉÒÔÁ¢¼´Æô¶¯×÷ÒµºÍÍ£Ö¹×÷Òµ¡£
¡
Ïà¹ØÎĵµ£º
--sql structured query language
--DML--Data Manipulation Language--Êý¾Ý²Ù×÷ÓïÑÔ
query information (SELECT),
add new rows (INSERT),
modify existing rows (UPDATE),
delete existing rows (DELETE),
perform a conditional update or insert operation (MERGE),
see an execution plan of SQL (EXPLA ......
ÕâÁ½Ì춼ûÓкúÃѧϰ£¬½ñÌìÖÕÓÚËãͶÈëÁËЩ£¬ÓÉÓڿγ̵ĹØÏµ£¬ÎÒµÄsqlÒ²ÊÇͬvbÒ»ÆðѧϰµÄ¡£ËäȻ֪µÀ̰¶à½À²»À㬿ÉÊǰ´ÕÕʵ¼ÊÇé¿ö£¬ÎÒÍêȫûÓÐÀíÓÉÅׯúsqlµÄ¡£
×î½ü¶¼°Ñʱ¼äͶÈëµ½vbºÍÃæÏò¶ÔÏóÖУ¬sql½ñÌìºÃºÃ¸´Ï°ÁËÏ£¬´Ócreate database ¿ªÊ¼£¬create table£¬alter table £¬ add constraint …&h ......
ÔÚPL/SQLÖÐÒ²ÌṩGOTOÓï¾ä,ÆäÓï·¨ÊÇ
GOTO label;
ÕâÀïlabelÊÇÔÚPL/SQL¿éÖж¨ÒåµÄ±êÇ©.±êÇ©ÊÇÓÃË«¼ýÍ·À¨ºÅÀ¨ÆðÀ´µÄ.µ±Ö´ÐÐGOTOÓï¾äµÄʱºò,¿ØÖÆ»áÁ¢¼´×ªµ½ÓɱêÇ©±êʶµÄÓï¾ä.
1.¶ÔÓÚGOTOµÄÏÞÖÆ
a.¶ÔÓÚ¿é,Ñ»·»òÕßIFÓï¾ä¶øÑÔ,ÏëÒª´ÓÍâ²ãÌøµ½ÄÚ²ãÊÇ·Ç·¨µÄ.
b.ʹÓÃGOTO×Ó¾ä´ÓÒ»¸öIF×Ó¾äÌøµ½ÁíÒ»¸ö×Ó¾äÖÐÒ²ÊÇ·Ç·¨µÄ.
begin
......
·½·¨Ò»£ºÊ¹ÓÃÓαê
declare @ProductName nvarchar(50)
declare pcurr cursor for select ProductName from Products
open pcurr
fetch next from pcurr into @ProductName
while (@@fetch_status = 0)
begin
print (@ProductName)
fetch next from pcurr into @ProductName
end
close pcurr
deallocate pcurr ......
Oracle Êý¾Ý¿â 10g ÌṩÁË´óÁ¿°ïÖú³ÌÐò£¨»ò“¹ËÎʳÌÐò”£©£¬¿É°ïÖúÄú¾ö¶¨×î¼Ñ²Ù×÷Á÷³Ì¡£ÆäÖÐÒ»¸öʾÀýÊÇ SQL Tuning Advisor£¬Ëü¿ÉÒÔÌṩÓйزéѯµ÷ÕûÒÔ¼°ÔÚÁ÷³ÌÖÐÑÓ³¤Õû¸öÓÅ»¯¹ý³ÌµÄ½¨Òé¡£
µ«Ç뿼ÂÇÒÔϵ÷Õû°¸Àý£º¼ÙÉèÒ»¸öË÷ÒýȷʵÓÐÖúÓÚij¸ö²éѯ£¬µ«¸Ã²éѯִֻÐÐÒ»´Î¡£ÕâÑù£¬¼´Ê¹¸Ã²éѯ¿ÉÒÔµÃÒæÓÚ´ËË÷Òý£¬µ«´´ ......