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INDICE
MARCO TEORICO..................................... TEORICO......................................................... ........................................ ........................................ ....................
1. TRIGGER.................................................................................................. 1.1 CONCEPTO:....................................................................................... 1.2 USO:........................................ ............................................................ ........................................................... ....................................... 1.3 1.3 UN TR TRIG IGGE GER R TIE TIENE NE AS ASOC OCIA IADO DO::..................................................... 1.4 1.4 Limitac itacio ione nes s de de lo los trig trigge gerrs.................................................................. 1.5 1.5 AP APLI LICA CACIO CIONE NES S TIPICA TIPICAS S DE TRIGG TRIGGER ERS S.......................................... 1.6 1.6 SINT SINTAX AXIS IS ES ESEN ENCIA CIAL L DE DE UN UN TRIG TRIGGE GER R............................................ 2. MICR MICROS OSOF OFT T SQL SQL SE SERV RVER ER...................................................................... ...................................................................... 2.1 2.1 Qué Qué es es M! M!"# "#s# s#$% $% SQL SQL Se" Se"&e &e""......................................................... 2.2 2.2 A 'u 'ué( é( )e s" s"&e &e M! M!"# "#s# s#$% $% SQL SQL Se" Se"&e &e""......................................... 2.3 T*#s +e +e L L!e(!,............................................................................. 2.2.- P# P#"" 'ué 'ué e)e e)e" " M!" M!"#s# #s#$% $% SQL SQL Se"& Se"&e" e"............................................ ............................................ DEMOSTRACION.................................................................................................
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I#ustrac%3( 14 C*rr*$*ra()* Tr%++er crea)* e( Ta$#a Pas................................ I#ustrac%3( 15 E#%'%(a()* Re+%str* e( Ta$#a Pa%s : NEPTNO....................... I#ustrac%3( 16 =er%>ca()* )at*s +uar)a)* e( #a ta$#a Pa%s&E#%'%(a)*.............1
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MANA/ DE TRI00ER EN S/ SER
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MARCO TEORICO 1. TRIGGER
1.1 CONCEPTO: Es u( pr*ce)%'%e(t* ?ue se e
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MANA/ DE TRI00ER EN S/ SER
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1.4
Limitaciones de los triggers
S*#* se pue)e( ap#%car a u(a ta$#a espec>ca es )ec%r u( tr%++er ( s%r,e para )*s * 'Gs ta$#as.
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MANA/ DE TRI00ER EN S/ SER
A)e'Gs t*)as #as acc%*(es reere(c%a#es e( casca)a F c*'pr*$ac%*(es )e restr%cc%*(es )e$e( ser c*rrectas para ?ue )ese(ca)e(a)*r se eca #a pa#a$ c#a,e OR. /*s )ese(ca)e(a)*res AFTER (* se pue)e( )e>(%r e( #as ,%stas.
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2.1 Qué es M!"#s#$% SQL Se"&e" Useful Not useful M!"#s#$% SQL Se"&e" es u( s%ste'a para #a +est%3( )e $ases )at*s pr*)uc%)* p*r M%cr*s*t $asa)* e( e# '*)e#* re#ac%*(a# cu
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E'presas I(st%tuc%*(es
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DEMOSTRACION 1. Restaurar Backup “NEPTNO! A"7#s e) P"#",7, SQL Se"&e" 212 C*(ectar
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MANA/ DE TRI00ER EN S/ SER
CREATE TRI00ER TR&CATE0ORIA&E/IMINADA ), %,), 'ue ,$e!%, ON )$*.Pa%s
), #*e",!/( ' "e,), e) %"e" A$%e" #!u""e +es*ués +e 'ue *,s, ) e)7(,!/( ATER DE/ETE AS BE0IN ),s se(%e(!,s s') 'ue ee!u%, e) %"e" INSERT INTO BDRe+%strar.)$*.Pa%s&E#%'%(a)* SE/ECT ROM DE/ETED ) END 0O
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