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Explain query execution plan?
- Optimizer available in SQL Server optimizes code to be effectively executed.
- A query execution plan demonstrates how this optimizer would run the query.
- Query execution plan can be viewed by:
- Using Show Execution Plan option available in Query Analyser,
- Displaying Estimated Execution Plan on query dropdown menu,
- Use SET SHOWPLAN_TEXT ON command before running a query and capturing execution plan event in a SQL Server Profiler trace.
Prove that a relation which is 4NF must be BCNF. Ans Let R be in 4NF. Suppose it is not in BCNF. Hence, there exists an FD X→Y in R such that x is not a super key. Although
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Explain algorithm of ER To Relational Mapping ? ER-to-Relational Mapping Algorithm: 1) Step 1: Mapping of regular entity types: For each strong entity type E, form a relatio
Mention the various user privileges All privileges directly granted to the user or role. All privileges granted to roles that have been granted to the user or role.
Prepare a gantt chart for the stock control project: Scenario Lucas-TVS is the Leader in Auto Electricals in India today with 50 years experience in desig
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
Saving Derived Attributes to Avoid Re-computation Data that is derived from other data should be stored in the computed form to avoid re-computation. For this, we could define
what is 3nf
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.
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