Search results
To check for null and empty: coalesce(string, '') = '' To check for null, empty and spaces (trim the string) coalesce(TRIM(string), '') = ''
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;
6 cze 2024 · The ISNULL function in MS SQL takes two arguments: the first is a value or column name, and the second is the default value if the first argument is null. This query retrieves rows where the code column is either null, an empty string, or contains only spaces.
To check if variable is null or empty use this: IF LEN(ISNULL(@var, '')) = 0 -- Is empty or NULL ELSE -- Is not empty and is not NULL
11 lip 2012 · Yes - I did try CASE WHEN (ID IS NULL) THEN 'YES' ELSE 'NO' END AS ID_Value But I am looking for some other better approach something like IF(ID IS NULL, 'YES', 'NO') AS ID_Value in the Ms Sql, so that everything can be in a single line. Any suggestions please
Using the ISNULL() function we could write the following query which will update any row in the Product table that has a NULL value in the Color column to an empty string. UPDATE [Production].[Product] SET Color = ISNULL(Color,'');
4 sty 2011 · NULL means absence of value (i.e. there is no value), while empty string means there is a string value of zero length. For example, say you have a table to store a person' data and it contains a Gender column.
