Sql limit update row count

Connect and share knowledge within a single location that is structured and easy to search. Due to this I am not even able to update using following query:. I'm calling the PK id , substitute with whatever your PK is called. Please test to see if I didn't make an off-by-one error; you may need to add or subtract 1 somewhere. For people get this post by search "update limit MySQL" trying to avoid turning off the safe update mode when facing update with the multiple-table syntax.

Since the offical document state. It gives an example. Which is really simple and elegant. Since the original answer doesn't get too much attention votes , I post more explanation. Hope this can help others. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 10 years, 7 months ago. Active 5 months ago. Viewed k times. I want to update rows in my table with starting from to next Is this correct? Can we limit update in this way? What can be done to achieve this? Connect and share knowledge within a single location that is structured and easy to search. Is there a way to configure SQL Server to limit the number of rows than an update statement can modify?

Say I wanted the limit to be 30, rows and someone fired an update that would modify 45, rows, they would receive an error or some other preventive message. A trigger would be how I would handle this. This will slow down all your update statements as SQL now has a bunch of extra work to do, but it'll handle your requirement. Personally I wouldn't like the idea of the instead of trigger and reapplying the update with a smaller row set as this gets into tricky areas of half completed operations now which could get very messy, quickly.

You could also use an instead of trigger. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Ask Question.

Asked 10 years, 1 month ago. Active 10 years, 1 month ago. Viewed 6k times. In the cases where a higher number of rows are affected than an integer can handle meaning more than 2,,, rows! This function returns the data type bigint. Sometimes it can be a bit confusing as what the last executed statement will be.

Take the following script for example:. What if it is? To avoid this kind of scenario, you can store the row count in a local variable. The script would then look like this:. The MERGE statement is a bit special, as it can perform insert, updates and deletes at the same time.

ROWCOUNT returns the total number rows affected by the MERGE statement which is correct, but this might make debugging or troubleshooting a bit more difficult, since you do not know how many rows were deleted, updated or inserted. We need to reset the data to rerun the example, so run the script above that creates the temporary tables and inserts the sample data.

A downside of this approach is the data duplication into the logging table, which can be troublesome when the MERGE statement has to handle large amounts of data. Related Articles. Delete duplicate rows with no primary key on a SQL Server table.