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List the table modification commands in SQL? A) Deletion B) Updates C) Insertion D) Update of a view
What are the disadvantages of relational approach? Disadvantages of relational approach: • Substantial hardware and system software overhead • May not fit all business models •
Define weak and strong entity sets? Weak entity set: entity set that do not have key attribute of their own are known as weak entity sets. Strong entity set: Entity set that
What is Identity? Identity (or AutoNumber) is a column that automatically produces numeric values. A start and increment value can be set, but most DBA leave these at 1. A GUID
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
Define Forms Based Interfaces? Forms-Based Interfaces - A forms-based interface display a form to each user. Forms are commonly designed and programmed for naive users and inte
Explain the Relational Completeness Codd described the term relational completeness to consider to a language that is complete with respect to first-order predicate calculus ex
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
explain participation constraints with examples
What is multiple relationship ?
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