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What is a hash index?
A hash index organizes the search keys, with their associated pointers, into a hash file structure.
coventions for displaying an ER schema as ER diagram
Rules Of Data Normalisation Let us now summarise Normalisation with the help of various clean rules. The following are the necessary rules for the Normalisation process: 1.
Differentiate between various levels of data abstraction? Data Abstraction - Abstraction is the procedure to hide the irrelevant things from the users and represent the rele
Question: One of the tasks a database management system must perform is to ensure that the data is still intact in the face of software and hardware failure. This task is known
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
Why is database design important?
While sorting, if the main storage available is not enough, the system writes data to an external help file. The SAP profile parameter, which determines DIR_SORTTMP
Given the subsequent relations: vehicle (reg_no, make, colour) Person (eno, name, address) Owner (eno, reg_no) Write expressions
what is object-identity
Can we delete data element, which is being used by table fields. No we cant delete data element.
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