OK Paste as. Treat my content as plain text, not as HTML. Existing Members Sign in to your account. This email is in use. Do you need your password? Submit your solution! When answering a question please: Read the question carefully. Understand that English isn't everyone's first language so be lenient of bad spelling and grammar. If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome. Don't tell someone to read the manual.
Chances are they have and don't get it. Provide an answer or move on to the next question. Let's work to help developers, not make them feel stupid. Related Questions. Sql - same data column retrieval. Sql query sum all common column data. Datagridview with multiple sources and columns to rows. YES YES, I know that some of these changes can happen within triggers too if you decide you want to create them … I prefer managing and using the dynamic sql cache for my statement written in code.
Blah, disregard my last statement … I started testing this across various database engines, and this is important to note …. Although, I should have ran this test before … I believe this is all worth noting for others that may use this type of update for logging purposes. The database engine seems to complete all of the column updates based on the current column values before committing.
He holds a Masters of Science degree and numerous database certifications. Pinal is an experienced and dedicated professional with a deep commitment to flawless customer service. Nupur Dave is a social media enthusiast and an independent consultant. She primarily focuses on the database domain, helping clients build short and long term multi-channel campaigns to drive leads for their sales pipeline. Is your SQL Server running slow and you want to speed it up without sharing server credentials? One other piece of advice is if you're going to be updating a large data set with indexes, and the source subset is smaller than your target but both tables are very large, move the changes to a temporary table first.
I tried to merge two tables that were nearly two million rows each and 20 records took 22 minutes. Once I moved the deltas over to a temp table, it took seconds. It is possible. Like npe said it's not a standard practice. But if you really have to:. Similar to an upsert, you could check if the item exists on the table, if so, delete it and insert it with the new values technically updating it but you would lose your rowid if that's something sensitive to keep in your case.
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Other than selecting the column name from the syscolumns table and writing an update statement with that. Lowell -- help us help you! Paul Bradshaw. You can very easily generate SQL to do the updates, to save you a lot of typing. You can whip up something like this very quickly:. Just replace "Name" with the name of your table, and run.
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