A mechanism for committing a consistent set of changes into a database atomically.

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33
votes
4answers
25k views

What risks are there if we enable read committed snapshot in sql-server?

I have read here that some extra data will be stored per row so we might see a performance degradation but what other risks are there? eg. Will this affect recovery of the database? Is there anything ...
3
votes
1answer
242 views

Is SQL Server Replication transactionally 'safe' across all published tables?

We have a system that has one of its datasources still on SQL Server 2000. In order to achieve higher availability, we are looking to setup transactional replication from this 2000 server to a 2008 ...
4
votes
1answer
652 views

Transaction and data consistency during a failure

When a database begins a transaction, all statements executed in that transaction are isolated and atomic (and consistent and durable). These are pretty much the definition of a transaction. ...
10
votes
1answer
5k views

How to use transactions with SQL Server DDL?

I have a login table into which all inserts are done by a single stored procedure. CREATE TABLE dbo.LogTable( LogRefnr int IDENTITY(1, 1) NOT NULL, LogQuery varchar(255) NOT NULL, LogTime ...
20
votes
3answers
38k views

How to find out who deleted some data SQL Server

My boss had a query from a customer yesterday asking how they could find out who deleted some data in their SQL Server database (it is the express edition if that matters). I thought this could be ...
3
votes
1answer
884 views

Duplicate UNIQUE KEY error after ROLLBACK in MySQL

I have a table like this mysql> describe seudonimos; +--------------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra ...
6
votes
3answers
3k views

Will the transaction log shrink automagically in SQL Server?

When SQL Server database in a SIMPLE mode, you don't have to care about the transaction log bakcups. But in a SIMPLE mode, the transaction log seems to grow as it does in FULL mode. Does is truncate ...
2
votes
1answer
442 views

SQL Server Logon Trigger causing problems with the Distributed Transaction Coordinator

I've created the following simple logon trigger on my SQL Server 2005: CREATE TRIGGER LOGON_RESTRICTION ON ALL SERVER FOR LOGON AS BEGIN PRINT 'Hello World' END GO Which seems to be working fine ...
1
vote
2answers
2k views

Distributed Transactions between SQL Server 2000 & MySQL Stopped Working

We have been successfully copying data from a MySQL Slave database into a SQL Server 2000 database. The MySQL server is a linked server. I have tried using v3.51 and v5.1.8 of the ODBC connector ...
6
votes
7answers
4k views

On DB2, who updated a record and what did the record look like before the update?

(SQL Server 2008 R2 Standard, database under full recovery) I have a table with fields id, firstname, lastname. A statement is executed: insert into dbo.sometable (id, firstname, lastname) values ...
1
vote
1answer
784 views

Is it possible to write an SQL query that automatically reconciles/“transactionalizes” payments and charges

I'm still working on the project mentioned here (http://dba.stackexchange.com/questions/2428/how-do-i-properly-design-a-many-to-many-charges-payments-accounting-system). The system is to give the ...
5
votes
3answers
3k views

Using MySQL triggers or transactions?

I want to ask your opinion in using MySQL triggers or transactions in a website. Actually I have a history payment table with - UserId | OperationId | Comment | Credits | Sign (debit or credit). So ...
19
votes
7answers
12k views

Oracle - Any way to view uncommited changes to a particular table?

I'm debugging through a batch process currently that does a lot of DML statements, but doesn't do a commit right away. It would be nice to be able to view the "pending" changes from another session ...
1
vote
1answer
298 views

Difference between Flashback Query and Serializable Transaction Mode?

Is there any conceptual difference between a SERIALIZABLE Transaction and a Flashback Query?
3
votes
2answers
341 views

What is the correct term to describe a “persistent transaction”?

I'm kind of a the administrator of a zero-administration OODBMS, but mostly I do programming. I remember reading years ago about some SQL database that had a concept of something like a permanent ...
5
votes
3answers
808 views

Deadlock Error from SQL Server 2000 to SQL Server 2008

After migrating data from SQL Server 2000 to SQL Server 2008, when I am doing any a transaction in the table which find out more row on the database, that's gives me error. Transaction (Process ...
5
votes
2answers
5k views

Current isolation level in oracle

How to get the current (default) transaction isolation level in oracle?
4
votes
1answer
1k views

Why is this rollback needed when using sp_addextendedproperty in a stored procedure?

In enter link description here I showed, how I document databases. To insert the extended properties, initially I uses plan sequences of sp_addextendedproperty calls. But lately I wanted to catch ...