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What is called as recursive partitioning?
The system repeats the splitting of the input unless each partition of the build input fits in the memory. Such partitioning is known as recursive partitioning.
Describe file organisation? A file is organized logically as a sequence of records. These records are mapped onto disk blocks. A) Fixed-Length Records Type deposit=record
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
Explain Candidate Key and Super Key A super key is a set of one or more than attributes that, taken collectively, permits us to identify uniquely a tuple in the relation. Wher
Self-Join: In a self join a table is joined with itself. Let consider the following sample partial data of EMP table EMPNO ENAME MGRID
Niles Video Inc. wants to create a website for online sales of movies (DVD and videotapes). People will be allowed to register as customers on the website and to update their store
Assignment #1 Data Management The questions on this exam are based on the Baxter Aviation case scenario. 1. (5 points) The systems analyst proposes the following two relationshi
Define Join and Outer Join and differentiate between them. Ans: Join - It generates all the combinations of tuples from two relations which satisfy a join condition. Oute
case study
1. Use the Invoice table structure shown below to answer the following questions: a) Draw the dependency diagram and identify the primary key and all dependencies, including al
What is a relationship called when it is maintained between two entities? A relationship is called Binary relationship when it is maintained between two entities.
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