ActiveRecordQueryCount is a Ruby gem designed to help you visualize and track the SQL queries executed by your ActiveRecord models within a block of code. By subscribing to ActiveSupport notifications ...

I have a table that logs a record containing a userid, a fileid and a date, one record inserted every time that file is downloaded.<BR><BR>I want to get the top 10 downloads by count for a given date ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

Query federation is a way to make use of distributed data sources on the Web, including many SPARQL endpoints as well as relational databases. SWObjects makes use of mapping rules represented as ...

Hey, been reading the board for a bit. First post. I'm having issues coming up with a SQL query that will provide the average admits for each day of the week. However, I can't for the life of me get ...

In this Microsoft SQL Server and JDBC tutorial, you'll learn how to connect to a Microsoft SQL Server in Java using JDBC. The steps are relatively straightforward: Each database is different, so ...