File - is a collection of related structured data, Primary key - the keys that are unique from others., Foriegn key - a field in one table that uniquely identifies a row of another table. Foreign key is defined in a second table but it refers to the primary key in the first table., Key field - a field in a record that holds the unique data that identifies that record from all the other records in the file or database., Flat file database - is a collection of data held in a single table, meaning data can only be viewed in a limited way., Relational database - Data may be held in a number of tables where links (or relationships) are created to connect the data in different tables to each other.,

Database

طباعة
تضمين

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟