Oracle Tutor

Well... An entity is defined by its attributes. Furthermore, each entity occurrence can be uniquely identified, by using an attribute...

Entity names are normally single words and the name chosen should be one familiar to the users. The entity name can include a ...

Entity relationship diagramming uses a standard set of symbols to represent each of these defined data groups and then proceeds by establish...

What is Entity relationship diagram? Entity relationship diagramming is a technique that is widely used in the world of business and informa...

SQL queries are combined using the UNION operator. Using UNION, multiple SELECT statements can be specified, and their results can be combin...