
Mini recapitulare - cursori
Authored by Ioana Nagit
Computers
University
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cursorul explicit:
este declarat de PL/SQL implicit
se foloseste pentru a procesa individual fiecare linie returnata de SELECT
nu exista
NU este util pentru instructiunea SELECT folosita cu INTO
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Variabila de tip RECORD poate avea aceleasi atribute ca si cursorul prin specificarea proprietatii:
%ROWTYPE
%TYPE
%ROWCOUNT
%SAMETYPE
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Atributul %ROWCOUNT:
primeste valoarea numarului de randuri care nu au fost afectate
ia valoarea 1 dupa o instructiune COMMIT sau ROLLBACK
ia valori True/False
primeste valoarea numarului de randuri care au fost afectate
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lipsa clauzei ELSE in cazul CASE EXPRESSION poate duce la aparitia unei exceptii daca:
toate expresiile din WHEN sunt indeplinite simultan
niciuna dintre expresiile din WHEN nu este indeplinita
nu se genereaza exceptii in acest caz
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Clauza FOR UPDATE:
se adauga pentru a bloca liniile afectate atunci cand cursorul este inchis
se adauga pentru a bloca liniile afectate atunci cand cursorul este deschis
nu exista in PL/SQL
impune deblocarea liniilor unei tabele anume
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