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What is the difference between internal tables and extract datasets? The lines of an internal table always have the similar structure. By using extract datasets, you can ha
Give the forms of triggers? The triggering event can be insert or delete. For updated the trigger can state columns. The referencing old row as clause The referencing
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
Consider the following frequency counts of some itemsets in a transaction database r : freq({A}, r) = 0.405 freq({B}, r) = 0.510 freq({C}, r) = 0.303 freq({A
Implementation and SQL Applications
What is called query processing? Query processing refers to the range of activities included in extracting data from a database.
Which is the properties of entities? Attributes is the properties of entities.
Find out the names of all employees who work for first Bank Corporation from database. SELECT EMPLOYEE_NAME FROM WORKS WHERE COMPANYNAME = ‘First Bank Corporation';
Consider an information system designed for an online company which provides IT products and services These include desktops, laptops, networking products, IT books, parts, and
Critically explained the benefits and limitations of different database technologies with proper examples
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