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28 gru 2011 · Check the not null condition and empty string in SQL command is use 'is null / not null' and '!='. please try this sample pattern script: SELECT * FROM [Employee] WHERE EMail is not null -- not null check and Email != '' -- not empty check
Plus one for the first answer (5 years later) to use both NULLIF() and coalesce to an empty string if company.OfferText is null. However, the 2nd NULLIF() call here serves no purpose, as if that value an empty string you're just going to coalesce back to an empty string anyway.
The SQL Server ISNULL() function lets you return an alternative value when an expression is NULL: SELECT ProductName, UnitPrice * (UnitsInStock + ISNULL(UnitsOnOrder, 0)) FROM Products;
Are you tired of grappling with SQL Server queries that involve checking if a column is not null and not an empty string? Look no further! In this guide, we'll explore some common issues, provide easy solutions, and empower you to write code like a pro.
5 lis 2012 · In this video, I show you how to filter for SQL Null or Empty String in SQL Server 2012. I will also show you a trick to make it easier to filter for both.
3 wrz 2024 · Transact-SQL syntax conventions. Syntax ISNULL ( check_expression , replacement_value ) Arguments check_expression. The expression to be checked for NULL. check_expression can be of any type. replacement_value. The expression to be returned if check_expression is NULL.
When inserting such data (without email) into the table, there are two available choices: set cell to NULL or set it to empty string (''). Let's assume that I'm aware of all the technical implications of choosing one solution over another and I can create correct SQL queries for either scenario.
