Many people are confused by various JOIN operations supported by SQL. Learn to master the SQL command line with this crash course in JOIN syntax. In response to previous SQL lessons, TechRepublic ...

I'm trying to glean some info from a mysql database. Id is a product id, type, is a format of the product available (multiple versions of each id), weight is the number of downloads of that product ...

I'm writing some code in C# where I need to (inner?) join two tables into a DataSet / DataTable. Essentially, I have two tables. Both have columns called "TestId" and "OperationId". Both are unsigned ...

When you want to find all the objects that are missing a corresponding object, then you need the LINQ equivalent of an outer join. Here, step by painful step, is how to build that query. Here's a ...