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 ...

Many businesses seem to believe that dimension tables and reference tables are indistinguishable objects. Apparently, the only difference worthy of note seems to be altering the object’s name from ...

The grain of a fact table is derived by the dimensions with which the fact is associated. For example, should a fact have associations with a Day dimension, a Location dimension, a Customer dimension, ...