Join Dependencies and fifth Normal form
by Joint dependency – Join decomposition is a further generalization of Multivalued dependencies. If the join of R1 and R2 over C is equal to relation R …
Category: Management Notes
Management Notes of Various Universities across india
Multivalued Dependencies and forth normal Form
Rules for 4th Normal Form For a table to satisfy the Fourth Normal Form, it should satisfy the following two conditions: It should be in …
Boyce-Codd Normal Form (BCNF)
Rules for BCNF For a table to satisfy the Boyce-Codd Normal Form, it should satisfy the following two conditions: It should be in the Third Normal …
Normal Forms NF3
Requirements for Third Normal Form For a table to be in the third normal form, It should be in the Second Normal form. And it …
Normal Forms NF2
For a table to be in the Second Normal Form, it must satisfy two conditions: The table should be in the First Normal Form. There …
Normal Forms NF1
If tables in a database are not even in the 1st Normal Form, it is considered as bad database design. Rules for First Normal Form The …
Functional Dependencies
In relational database theory, a functional dependency is a constraint between two sets of attributes in a relation from a database. In other words, functional …
Relational Algebra
Relational algebra is a procedural query language, which takes instances of relations as input and yields instances of relations as output. It uses operators to …
PL/SQL: LOB’S
Large Objects (LOBs) are a set of datatypes that are designed to hold large amounts of data. A LOB can hold up to a maximum size …
PL/SQL: Cursors
Oracle creates a memory area, known as the context area, for processing an SQL statement, which contains all the information needed for processing the statement; …
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