Delete null rows sql server 2005

When you say "materialise the rows to delete into a temp table first" are you suggesting to place all those records with their all columns into temp table?

I believe you are suggesting me to move those to temp table completely but wanted to double check — cilerler. Thanks Martin, Will test it after 6pm. And your answer is, It is definitely the only PK exist in that table — cilerler.

Show 1 more comment. Joe Obbish Joe Obbish Thank you for detailed info. I set that limit to not lock table. If I'm not mistaken SQL has a hard limit that locks entire table if the delete count goes above And since this will be a long process I can not effort to lock that table for a long period of time. If I set that to , do you think I will get the same performance? There's nothing wrong with using a batch size of The key is that each loop will do roughly the same amount of work.

I have to accept other answer due to the speed differences. Your solutions are much better than mine and I really do appreciate for your time Two thoughts spring to mind: The delay is probably due to indexing with that volume of data.

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This article provides a script that you can use to remove duplicate rows from a table in Microsoft SQL Server. There are two common methods that you can use to delete duplicate records from a SQL Server table. For demonstration, start by creating a sample table and data:.

This method is simple. This example probably wouldn't be that useful in a production situation, but it does illustrate that you need to take special care when you encounter NULLs in string operations.

You should also take care of calculations on numeric fields that allow NULL values. This is something to consider when you are defining your table structure and constraints. If you would like to contact Tim, please e-mail him at chapman. TechRepublic's free SQL Server newsletter, delivered each Tuesday, contains hands-on tips that will help you become more adept with this powerful relational database management system.

Automatically subscribe today! The value that you are substituting must be of the same data type as the field that may contain the NULL value. Editor's Picks. The best programming languages to learn in Check for Log4j vulnerabilities with this simple-to-use script.

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