> I'm not sure if it's a sql92 thing but count is documented as:
> Returns a count of the number of non-NULL values of expr in the rows
> retrieved by a SELECT statement. The result is a BIGINT value.

Ah, that's good info!

> SQLServer doesn't do this?


UPDATE [posts] SET [comments_count] = NULL

SELECT COUNT([comments_count]) 
FROM [posts]
WHERE [id] IS NOT NULL

That does indeed return 0. But that  does not mean I am constructing the 
correct SQL via the Arel visitor or not :)


 - Thanks!
    Ken


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