Check null in sql query

Contents hide. Related Posts The solution to jquery check is null or empty. Magento 2 Check File Exists Programmatically. Related Posts. So that, optimizer estimates how much memory and other resources are required for a query. As we can see there is an number of NULL values are stored in the MiddleName column and this information is used by the query optimizer. In some cases, the ISNULL function is used with the where condition but this usage method may lead to use indexes inefficiently. However, this query cannot use the created non-clustered index so it will read all index pages and then return the appropriate rows.

To eliminate this situation, we can make a little code modification in the query so that the query optimizer can use the indexes more efficiently. The following query returns some rows as like the previous one but it uses the indexes more efficiently. FROM Person. USE [ AdventureWorks ]. ON [ Person ]. Does that help a little? I'm fairly new to SQL so it will take me a while to build you the schemas on that site. Show 5 more comments. Gordon Linoff Gordon Linoff 1.

This runs but doesn't return a value for DATE, it just gives everything a null. Xin Xin Mahesh Sambu Mahesh Sambu 2 2 silver badges 13 13 bronze badges. Abdullah Zaid Abdullah Zaid 1 1 silver badge 9 9 bronze badges. Kees de Wit Kees de Wit 1, 14 14 silver badges 26 26 bronze badges. Slight variation on Mahesh solution for mssql: case when isnull B. Amirhossein 2 2 gold badges 10 10 silver badges 31 31 bronze badges. Your welcome, please read help center and get tour for give best feedback.

Sign up or log in Sign up using Google. Asked 11 years, 6 months ago. Active 11 years, 6 months ago. Viewed 12k times. I have the following stored procedure. Any help would be greatly appreciated. Improve this question. Add a comment. Active Oldest Votes. This should do AND product.