In order to use UNION, the column list for all the SELECTS must be the same (at least in type/length), since it's returning a single resultset; you're basically trying to return both the email and the ...

SQL is a widely-used programming language for computer databases in business. Frequently, software developers need to combine different kinds of data, such as integer and character fields, into a ...

I'm having to convert someone's query from SQL-89 to SQL-92 and I thought I had it correct but am getting different counts and am slowly going crazy trying to figure it out. I don't have a lot of ...

As an addendum to last week's post about a recent SQL Server camp held for PHP developers, Microsoft's Brian Swan has published some new nuts-and-bolts details for converting MySQL queries. Swan, who ...