Actually, that search yields all questions and answers. Adding "is:question" to the search query http://stackoverflow.com/search?q=nullif+%5Bsql-server%5D+is%3

Actually, that search yields all questions and answers. Adding "is:question" to the search query http://stackoverflow.com/search?q=nullif+%5Bsql-server%5D+is%3Aquestion http://stackoverflow.com/search?q=nullif+%5Bsql-server%5D+is... results in 337 answers. This is still a large number though because NULLIF is a ridiculously simple function to use. Base upon a small sample, these questions appear to be due to either misordered expressions or poor grasp of order of operations that happen to involve NULLIF.