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Define query optimization.
Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
Give the two reasons for allowing concurrency
Consider the 1ollowin8 relation: CAR SALE (Car_id, Option_type, Option_listprice, Sale_date, Option_discountedprice) This relation refers to options installed in cars (e.g., crui
Submit the table creation statements (including constraints) for the Database Model. Submit them all in a single script file. Also submit a document explaining what test data yo
Which method of access uses key transformation? A Hash method of access uses key transformation.
Explain the challenges before an E-business management.
The traffic data mgmt. systems infrastructure plan describes the software, hardware, data network, and other elements that will support the TDMS. The infrastructure plan is based o
When are they useful? Justify with an example. The temporary tables are commonly used to support specialized rollups or exact application processing needs. Unlike a permanent t
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
Explain the two constraints, check and foreign key in SQL along with an example for each. Give the syntax. CHECK constraint - CHECK constraint specifies an expression which
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