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What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
What are the various properties of Relational tables? Relational tables have 6 properties: 1. Each row is unique. 2. Column values are of the same kind. 3. Values are
explain in detail about time stamp orderting/
Assignment #1 Data Management The questions on this exam are based on the Baxter Aviation case scenario. 1. (5 points) The systems analyst proposes the following two relationshi
The Locking Protocol: To manage concurrency related problems we use locking. A lock is mainly a variable that is associated with a data item in the database. A lock can be located
An example of a weak entity is Staff because the availabilityID cannot be uniquely identified unless it is used in conjunction with the foreign key known as availabilityID in the A
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
CREATE YOUR DATABASE TABLES Your database project must have a minimum of four tables. Include the SQL scripts used to create the tables in your documentation. Explain the tables
what is completeness constrent?
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