sql-delete

I accidentally deleted some huge number of rows from a table... How can I roll it back? I executed the query using PuTTY . I'll be grateful if any of you can guide me safely out of this... If you didn't commit the transaction yet, try rollback . If you have already committed the transaction (by commit or by exiting the command line client), you must restore the data from your last backup. Omry Yadan If you haven't made a backup, you are pretty much fudged. Select0r A "rollback" only works if you used transactions . That way you can group queries together and undo all queries if only one of

I'm new to SSIS and need help on this one. I found an article which describes how to detect rows which exist and which have changed. The part that I'm missing is how to update rows that changed. I found some articles which say that it's also good solution to delete records which have changed and insert new recordset. The thing is I don't know how to do that step of deleting (red box). Any suggestions? If you have to delete the rows within Data Flow Task , then you need to use the OLE DB Command transformation and write a DELETE statement like DELETE FROM dbo.Table WHERE ColumnName = ? . Then

What is the best way to delete all rows in a table in Hibernate ? If I iterate over a collection and call session.delete() it's not performing to my knowledge. If I use another option session.createQuery("delete ...") it doesn't affect persistence context. When I should use these methods if there is no better variant? if you don't have anything to cascade, use the HQL delete DELETE FROM enityName if you have cascades, iterate the collection and delete each one individually. The problem lies in the fact that hibernate handles cascades internally, rather than leaving this to the database. So

I am a Linux admin with only basic knowledge in Mysql Queries I want to delete many table entries which are ip address from my table using id , currently i am using DELETE from tablename where id=1; DELETE from tablename where id=2; but i have to delete 254 entries,so this method is going to take hours,how can i tell mysql to delete rows that i specify,coz i want to skip deleting some entries out of this 254. Deleting whole table and importing needed entries is not an option. The best way is to use IN statement : DELETE from tablename WHERE id IN (1,2,3,...,254); You can also use BETWEEN if

How to reject delete statement in before delete trigger (mysql) ? Sample use case : I have a record with specified id that I want to will not be deleted. You could create a table that uses a foreign key constrait referencing your ID column (provided that is the primary key of your table). The insert a row into that "child" table that references ID = 0 and remove all update/delete privileges for your user from that table. Now if someone tries to delete the row with ID = 0 in the "parent" table that will fail due to an existing child row in the other table. esaj Look here, same thing but with an