The definition of a database. It defines the structure and content in each data element within the structure. Schemas are often designed with visual modeling tools that automatically create the SQL ...

The definition of an XML document, which identifies the XML tags and includes the rules for their interrelationships; for example, there must be at least one B tag within every tag A, or there can ...

relationships are established between the groups of data. Typically, a database is organized according to the types of data and how you want to use the data. You must understand and be familiar with ...