Updating once
For the project I am working on, I am not allowed to use Click Once.My boss wants the program to look "real" (with an installer, etc).Edit: Findings of Dakusan prove that my performance estimations are not quite valid.Please see this answer for another, more elaborate research.I just tested this, and the INSERT method was 6.7x faster for me than the TRANSACTION method. The TRANSACTION method still has to run each individually query, which takes time, though it batches the results in memory, or something, while executing.The TRANSACTION method is also pretty expensive in both replication and query logs.These values are located in the Installshield project properties. Some references: I think you should check the following project at This sample application is developed in C# as a library with the project name “Auto Updater”.
An Access database is not a file in the same sense as a Microsoft Office Word 2007 document or a Microsoft Office Power Point 2007 slide deck.
UPDATE table SET Col1 = 1 WHERE id = 1; UPDATE table SET Col1 = 2 WHERE id = 2; UPDATE table SET Col2 = 3 WHERE id = 3; UPDATE table SET Col1 = 10 WHERE id = 4; UPDATE table SET Col2 = 12 WHERE id = 4; If there is no duplicates then i dont want that row to be inserted. because i am fetching information from another site which maintains tables with id's. if the site has new records then i will end up inserting only the ids and count except all other information.
if and only if there is an entry for the id then it should update else it should skip. $operation Checked) $command Txt .= " WHEN $operation ID THEN $operation Checked "; $command Txt .= ' ELSE id END WHERE id IN ('.implode(', ', array_keys(block Operation Checked )).');'; variant, a variant with "case / when / then" clause and a naive approach with transaction. The overall conclusion is that the variant with case statement turns out to be twice as fast as two other variants, but it's quite hard to write correct and injection-safe code for it, so I personally stick to the simplest approach: using transactions.
So in general, I feel the INSERT method is both best and easiest to use.
The queries are smaller and easier to read and only take up 1 query of action. Bonus stuff: The solution for the INSERT non-default-field problem is to temporarily turn off the relevant SQL modes: first if you plan on reverting it. SQL files to remove php interpreter overhead There is a setting you can alter called 'multi statement' that disables My SQL's 'safety mechanism' implemented to prevent (more than one) injection command.
