1. Further improvements are, however, needed, especially in areas of redundancy and data security.
2. Add a to primary key every database table to uniquely identify each record.
3. If reference is made to a primary key from another table, this is termed a foreign key.
4. A compound key 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 index.
6. Referential integrity 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 subset of the functionality of the most expensive and powerful database packages.
8. Software programmers are well acquainted with database concepts through relational databases like Oracle, SQL SERVER and MySQL, etc.
The last weekend i went to theme park called "Dinoworld".There were interesting sculptures of different dinosaur species like t-rex.They looked like alive i tell you!It was very fun to read about what they loved to eat,how they called,and especially why they looked the way they did.There were some silly childish attractions,but don't worry,there were good and scary ones too.I saw a really well made rollercoaster,i tried it and kept repeating,that was so much fun!Also they had interesting food and merchandise,also the theme of dinos.
I was there for about 2-3 hours long,they had really much to see,and i really felt like being in some kind of dinosaur world for a moment.I want you to visit this fantastic place and see everything yourself.
1. Further improvements are, however, needed, especially in areas of redundancy and data security.
2. Add a to primary key every database table to uniquely identify each record.
3. If reference is made to a primary key from another table, this is termed a foreign key.
4. A compound key 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 index.
6. Referential integrity 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 subset of the functionality of the most expensive and powerful database packages.
8. Software programmers are well acquainted with database concepts through relational databases like Oracle, SQL SERVER and MySQL, etc.
Объяснение:
Объяснение:
Hello my dear friend "Имя друга"
The last weekend i went to theme park called "Dinoworld".There were interesting sculptures of different dinosaur species like t-rex.They looked like alive i tell you!It was very fun to read about what they loved to eat,how they called,and especially why they looked the way they did.There were some silly childish attractions,but don't worry,there were good and scary ones too.I saw a really well made rollercoaster,i tried it and kept repeating,that was so much fun!Also they had interesting food and merchandise,also the theme of dinos.
I was there for about 2-3 hours long,they had really much to see,and i really felt like being in some kind of dinosaur world for a moment.I want you to visit this fantastic place and see everything yourself.
With big pleasure,"Имя"