If you only want to match N” as an empty string SELECT COLUMN FROM TABLE WHERE DATALENGTH(COLUMN) > 0 If you want to count any string consisting entirely of spaces as empty SELECT COLUMN FROM TABLE WHERE COLUMN <> ” If you want to use DATALENGTH for any string consisting entirely of spaces then you […]
Table below shows the default value for the different predefined data types. Type Default sbyte, byte, short, ushort, int, uint, long, ulong 0 char ‘\x0000’ float 0.0f double 0.0d decimal 0.0m bool false object null string null As you can see, for the integral value types, the default value is zero. The default value for […]
The issue occurs in Batch Edit Mode, because in this mode an empty invisible row is created and used for further grid editing. Since the Eval method returns a value type of an object, your attempt to call the ToString() method to the null value can lead to an exception. If you remove this conversion and use <%# […]
drpList.Items.Insert(0, new ListItem(String.Empty, String.Empty)); drpList.SelectedIndex = 0;
In SQL Server (Transact-SQL), the COALESCE function returns the first non-null expression in the list. If all expressions evaluate to null, then the COALESCE function will return null. SELECT COALESCE(NULL, NULL, ‘ErcanOPAK.com’, NULL, ‘blog.ErcanOPAK.com’); Result: ‘ErcanOPAK.com’ SELECT COALESCE(NULL, ‘ErcanOPAK.com’, ‘blog.ErcanOPAK.com’); Result: ‘ErcanOPAK.com’ SELECT COALESCE(NULL, NULL, 1, 2, 3, NULL, 4); Result: 1