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Task 1. Fill in the blanks in the sentences of words within the meaning of the proposed list. Words: Referential integrity, subset, compound key, database, primary key, redundancy, foreign key, index
1. Further improvements are, however, needed, especially in areas of and data security.
2. Add a to every database table to uniquely identify each record.
3. If reference is made to a primary key from another table, this is termed a .
4. A is a key that consists of multiple columns, because one column is not sufficiently unique.
5. A special data structure that serves the processes of accessing relationship information by storing specific values that correspond
to portions of the relationship content is the concept of a database .
6. is a relational database concept, which states that table relationships must always be consistent.
7. MySQL is a very powerful program in its own right. It handles a large of the functionality of the most expensive and
powerful database packages.
8. Software programmers are well acquainted with concepts through relational databases like Oracle, SQL SERVER
and MySQL, etc.

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