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What is De-normalization?
De-normalization is the method of attempting to optimize the performance of a database by adding redundant data. It is sometimes essential because current DBMSs execute the relational model poorly. A true relational DBMS would allow for a fully normalized database at the logical level, whereas providing physical storage of data that is tuned for high performance. De-normalization is a method to move from higher to lower normal forms of database modeling in order to speed up database access.
What is a block and a block number? A block is a contiguous sequence of sectors from a single track of one platter. Every request specifies the address on the disk to be refere
What is OLTP (Online Transaction Processing)? In OLTP - online transaction processing systems relational database design use the discipline of data modeling and generally follo
Sequences Sequences: Automatically produce unique numbers Are sharable Are typically used to make a primary key value Replace application code Speed up t
Question 1 Explain the concept of Foreign Key. How a foreign key differs from a Primary Key? Can the Foreign Key accept nulls? Question 2 With a necessary example explain (i)
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How can i turn a conceptual entity relationship diagram into a logical entity relationship diagram? what do i have to do with "mandetory or" and "optional or" relationships?
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I have a small project that contains 3 deliverable s. I have done the first one and I would like you to help me with second one
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