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Illustrate the class diagram for class room scheduling system If in any college, the number of classrooms are limited which have to be allocated to various classes and instruct
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Write short notes on relational constraints? Relational Constraints are: 1. NOT NULL 2. Unique 3. Primary key 4. Foreign key 5. Table check
What is a recursive relationship? Give an example not used in the text. A recursive relationship is a relationship among an entity and itself. For example, given the entity PER
In which form of relational database developer refers to a record? In a tuple form of relational database developer refers to a record.
Whst is logical schema ? Logical schema is the entire database.
Example :; transfers transfer_amount from x's account to y's account ; Supposes x&y both accounts exist TRANSACTION (x, y, transfer_amount) Start transaction IF X AND Y
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
how does Btree differ from a B+ - tree?
What are the kinds of Strings? -A binary string in MySQL is one that MySQL treats as case sensitive in comparisons. -A non binary string in MySQL is one that MySQL does'nt
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