How can I group by on a field which has NULL values? How can I group by on a field which has NULL values? sqlite sqlite

How can I group by on a field which has NULL values?


sql sqlite null count group-by

From Aggregate Functions in SQLite

The count(X) function returns a count of the number of times that X is not NULL in a group. The count(*) function (with no arguments) returns the total number of rows in the group.

So, the COUNT function does not count NULL so use COUNT(*) instead of COUNT(y).

SELECT y, COUNT(*) AS COUNTFROM mytableGROUP BY y

Or you can also use COUNT(x) like this one.

SELECT y, COUNT(x) AS COUNTFROM mytableGROUP BY y

See this SQLFiddle

sql sqlite null count group-by

You can use isnull in SQL which gives all null values a different identity

Just Run the below query, you will get the desired results

Select y,count(isnull(y,-1)) as [Count]from mytablegroup by y

Recent Posts
How can I color dots in a xy scatterplot according to column value?
How to update a claim in ASP.NET Identity?
What does {0} mean when initializing an object?
Accessing members of items in a JSONArray with Java
How to log SQL statements in Spring Boot?
Powershell Get-WebSite name parameter is ignored
How to detect scroll to bottom of html element
Java synchronized method
How to test controllers with CodeIgniter?
Detect Visual Composer
Matplotlib: Specify format of floats for tick labels
Rails join a list of strings with commas and "and" before the last