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troubleshooting Question

Single row for Count(column is NULL), Count(all rows)

Avatar of Jim Horn
Jim HornFlag for United States of America asked on
Microsoft SQL ServerMicrosoft SQL Server 2008
10 Comments1 Solution156 ViewsLast Modified:
Hi all

Does anyone have some quick and dirty (copyright jimpen) T-SQL to return a set with a single row that contains a count of all rows where a specific value is NULL (say column_name), and a count of the rows in the entire table (say table_name)?

I've put together the below CTE, which works fine, but it seems like there's a more elegant way to do this that I'm not grasping.

Thanks in advance.
Jim

;
WITH m as (
	SELECT 'Account' as label, COUNT(id) as row_count_column_name_missing
	FROM table_name
	WHERE column_name IS NULL)
, a as (	
	SELECT 'Account' as label, COUNT(id) as row_count_all
	FROM table_name) 
SELECT 
	m.label, 
	m.row_count_column_name_missing, 
	a.row_count_all,
	CAST(m.row_count_column_name_missing / CAST(row_count_all as numeric(19,4)) * 100 as numeric(5,2)) as pct_missing
FROM m
	JOIN a ON m.label = a.label