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Composite key
A composite key is a primary key that consists of two or more columns.
Foreign key
A foreign key is a column (or set of columns) in one table that references the primary key of another table.
Primary key
A primary key is a unique identifier for each record in a table.
Relationships
Relationships define how tables are connected in a relational database.
Tables
Tables are the core structure of a relational database, where data is organized into rows and columns.