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What is meant by heuristic optimisation?Discuss the major heuristics that are applied during query optimisation.
What is DML (Data Manipulation Language)? This language that enable user to access or manipulate data as organised by appropriate data model. Procedural DML or Low level: DM
what is Storage-Device Hierarchy question
What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
Create centralized relational database using Top down method- Construction of Logical Model: Translation EERD into Relational Schema: Use the 8 steps algorithm of converting EERD
limitations and benefits in database tecknowlagy
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
Explain the EXISTS and UNIQUE functions of SQL. Give an example for each? EXISTS: The EXISTS function takes one parameter that is a SQL statement. If any records exist which
Question 1 Discuss about second normal form and third normal form Question 2 Write short note on 1) Data Manipulation Language 2) Data Definition La
Consider the following relational schema: Doctor(DName,Reg_no) Patient(Pname, Disease) Assigned_To (Pname,Dname) Give expression in both Tuple calculus and Domain calculus for
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