The Gateway to Computer Science Excellence
0 votes
57 views

No automatic alt text available.

in Databases by Boss (48.6k points) | 57 views
0

i think the option is wrong.

for uncommited transactions we do undo operation and for other we do redo operation. first undo is performed then redo is done.

t2 must be undone and then t1 should be redone.

we must undo log record 6 and then redo log record 2 and 3

Please log in or register to answer this question.

Related questions

0 votes
0 answers
1
asked Dec 25, 2018 in Compiler Design by Sanjay Sharma Boss (48.6k points) | 67 views
+2 votes
1 answer
2
asked Dec 25, 2018 in Compiler Design by Sanjay Sharma Boss (48.6k points) | 66 views
0 votes
2 answers
3
asked Dec 25, 2018 in Probability by Sanjay Sharma Boss (48.6k points) | 111 views
Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true
50,666 questions
56,158 answers
193,767 comments
93,758 users