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Difference between LEFT OUTER JOIN and RIGHT OUTER JOIN
In left outer join tuples from the left-hand-side relation which do not match any tuple in the right-hand-side relation are padded along with nulls and are added to the result of the left outer join. Likewise, in right outer join tuples from the right-hand-side relation which do not match any tuple in the left-hand-side relation are padded along with nulls and are added to the result of the left outer join.
Horizontal Fragmentation- Horizontal fragmentation groups together the tuples in a relation that are collectively used by the main transactions. A horizontal fragment is produced b
Illustrate the class diagram for class room scheduling system If in any college, the number of classrooms are limited which have to be allocated to various classes and instruct
What are the two integrity rules? Ans: The two integrity rules are: Entity Integrity Rule & Referential Integrity Rule. Entity Integrity Rule - If the attribute A of rel
What does conceptual design work? A conceptual design involves modelling independent of the DBMS.
Describe the definition of a transaction in SQL Ans: The SQL transaction starts implicitly. Transactions are finished by either Commit work that commits the transaction and st
What are the two statements regarding transaction? The two statements regarding transaction of the form are:- A) Begin transaction B) End transaction
Explain the term- Query. Queries are used to repossess and show specific records in a table. They can also be used to show specific fields of specific records, which meet the co
Determine the Derived attribute to avoid re-computation Each class box consists of an ordered list of attributes and operations, each represented as a next string. We can find
What is an object ID? Each class-derived table has an ID for primary key, one or more object IDs form primary key for association derived tables. An object ID is equivalent dat
When is a transaction rolled back? Any changes that the aborted transaction made to the database must be uncompleted. While the changes caused by an aborted transaction have be
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