Learn the differences between Is Null and IsNull() in Access Your email has been sent How many null values exist? What is the difference between a null value and a blank entry? This article answers ...

I've been in an argument with one of our devs that took an update statement with an inner join and made it a left join (because inner was missing some records somehow in the left table - tableB in ...

I have to write a query on a positively atrocious table (this is with MSSQL 2005). Basically, multiple "lists" are stored in a single gigantic table called "UserData". I'm building the SQL statement ...

This article is also available as a PDF download. Where errors are concerned, null values are an equal-opportunity menace. If an unhandled null value doesn’t generate a runtime error, it’ll show up in ...