Click here to Skip to main content
14,457,064 members


Chris Maunder16-Jul-09 4:10
cofounderChris Maunder16-Jul-09 4:10 
PinnedHow to get an answer to your question PinPopular
Chris Maunder10-Nov-05 17:30
cofounderChris Maunder10-Nov-05 17:30 
QuestionCreate a new Primary Key on survey table Pin
learning_new25-Feb-20 13:01
Memberlearning_new25-Feb-20 13:01 
QuestionMessage Closed Pin
11-Feb-20 23:33
professionalmodelinmumbaicity11-Feb-20 23:33 
QuestionIndexing question Pin
Super Lloyd5-Feb-20 14:35
MemberSuper Lloyd5-Feb-20 14:35 
AnswerRe: Indexing question Pin
Eddy Vluggen5-Feb-20 16:09
professionalEddy Vluggen5-Feb-20 16:09 
GeneralRe: Indexing question Pin
Super Lloyd5-Feb-20 18:38
MemberSuper Lloyd5-Feb-20 18:38 
GeneralRe: Indexing question Pin
Eddy Vluggen6-Feb-20 3:50
professionalEddy Vluggen6-Feb-20 3:50 
AnswerRe: Indexing question Pin
Jörgen Andersson5-Feb-20 23:28
communityengineerJörgen Andersson5-Feb-20 23:28 
AnswerRe: Indexing question Pin
Richard Deeming6-Feb-20 1:17
communityengineerRichard Deeming6-Feb-20 1:17 
Questionintegrity constraint Pin
Tara112-Feb-20 7:23
MemberTara112-Feb-20 7:23 
The quote below is from An Introduction to Database Systems, 8th edition, C J Date.

Is that possible systems crash while transferring updates from the physical device to the database?
If yes, since transactions are the unit of recovery, those updates that are written to the database should be undone?
"It is quite possible, for instance, that the system might crash after the COMMIT has been honored but before the updates have been physically written to the database--they might still be waiting in a main-memory buffer and so lost at the time of the crash. Even if that happens, the system's restart procedure will still record those updates in the database: it is able to discover the values to be written by examining the relevant records in the log."

modified 2-Feb-20 13:48pm.

AnswerRe: integrity constraint Pin
Wendelius2-Feb-20 9:47
mveWendelius2-Feb-20 9:47 
GeneralRe: integrity constraint Pin
Tara112-Feb-20 10:07
MemberTara112-Feb-20 10:07 
GeneralRe: integrity constraint Pin
markkuk3-Feb-20 0:48
Membermarkkuk3-Feb-20 0:48 
Questiontransaction recovery Pin
Tara112-Feb-20 6:46
MemberTara112-Feb-20 6:46 
AnswerRe: transaction recovery Pin
Eddy Vluggen3-Feb-20 4:00
professionalEddy Vluggen3-Feb-20 4:00 
QuestionCopy structure of all the tables of one database to another server Pin
Member 1473192331-Jan-20 5:58
MemberMember 1473192331-Jan-20 5:58 
AnswerRe: Copy structure of all the tables of one database to another server Pin
phil.o31-Jan-20 6:12
mvephil.o31-Jan-20 6:12 
AnswerRe: Copy structure of all the tables of one database to another server Pin
Eddy Vluggen3-Feb-20 4:01
professionalEddy Vluggen3-Feb-20 4:01 
Questionintegrity constraint Pin
Tara1129-Jan-20 11:36
MemberTara1129-Jan-20 11:36 
AnswerRe: integrity constraint Pin
Mycroft Holmes29-Jan-20 11:56
MemberMycroft Holmes29-Jan-20 11:56 
GeneralRe: integrity constraint Pin
Tara1129-Jan-20 12:05
MemberTara1129-Jan-20 12:05 
GeneralRe: integrity constraint Pin
Mycroft Holmes29-Jan-20 12:21
MemberMycroft Holmes29-Jan-20 12:21 
AnswerRe: integrity constraint Pin
Wendelius2-Feb-20 10:01
mveWendelius2-Feb-20 10:01 
QuestionOracle SQL query to MS-SQL Pin
Member 951930620-Jan-20 23:37
MemberMember 951930620-Jan-20 23:37 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.