Database normalization is the cornerstone of database theory. Once a database is normalized, relationships between the data in multiple tables must be established.

Excel possesses formidable database powers. Creating a relational database starts with a Master table that links to subordinates called (awkwardly) Slave, Child, or Detail tables.

A question asked about data contained in two or more tables in a relational database. The relational query must specify the tables required and what the condition is that links them; for example ...

A table in a database holds the attributes for one entity only. Data can then be added in the form of records. Rather than storing information in one table, relational databases store data across ...