Top "Isnull" questions

How to check if JSON object is empty in Java?

In Java, if I use the following JSON string as an example, how would I check if the objects are …

java json isnull

Using ISNULL in where Clause doesn't return records with NULL field

Table: ID AppType AppSubType Factor 1 SC CD 1.0000000000 2 SC CD 2.0000000000 3 SC NULL 3.0000000000 4 SC NULL 4.0000000000 Query: declare @ast varchar(10) set @ast = null …

sql sql-server-2008 isnull

Check if variable is_undefined in PHP

In PHP, I want to check if a variable has not been set/defined, where setting a variable NULL is …

php isset isnull isnullorempty

Checking to see if a an Enum is null or empty

I am trying to validate a json that is being sent into my controller and I am using the BindingResult …

java validation enums isnull

MySQL - How Do I Count Nulls and Not Nulls?

I have a simple table of installs: prod_code email install_slot If the install_slot is NULL, then it's …

mysql sql group-by isnull notnull

SQL Server: ISNULL on uniqueidentifier

I am trying to compare a column col1 and a variable @myvar in a WHERE clause. Both usually contain GUIDs, …

sql sql-server null uniqueidentifier isnull

Django: filtering queryset by 'field__isnull=True' or 'field=None'?

I have to filter a queryset by a dynamic value (which can be None): may I simply write: filtered_queryset = …

django django-models django-queryset isnull

TSQL ORDER BY with nulls first or last (at bottom or top)

I have a date column which has some NULL. I want to order by the date column ASC, but I …

sql-server tsql sql-order-by isnull

Remove rows with empty lists from pandas data frame

I have a data frame with some columns with empty lists and others with lists of strings: donation_orgs donation_…

python list pandas isnull

Finding null value in Dataset - DataRow.IsNull method vs ==DbNull.Value - c#

What are the benefits of using the c# method DataRow.IsNull to determine a null value over checking if the …

c#-4.0 dataset datarow dbnull isnull