Assuring optimal performance of database applications starts with coding properly formulated SQL. Poorly written SQL and application code is the cause of most performance problems. As much as 75% of ...

Getting frustrated with my lack of SQL-foo ...<BR><BR>I want to update my 'main' table based on the query of an 'editor' table (a copy of the 'main' table with the additional field named delta which ...

I have written an application that takes in a fixed-width file (thanks in no small part to advice I recieved in a seperate thread) and then dissasembles each line, runs a fairly meaty SQL SELECT query ...

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 ...

The SQL query language was designed to provide programmers with a way to create, maintain and modify databases in a structured way. Using SQL, the programmer can add and remove items from databases as ...