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softetechnologies
SQL
77    Arnab De    21/11/2021
A set or collection of one or more attributes or fields (column), which uniquely identify a row or tuple in a relation or table is known as super key.
21
November, 2021
72    Arnab De    21/11/2021
All the minimal super key with no redundant attributes is known as candidate key. candidate keys are the subset of super keys.
21
November, 2021
73    Arnab De    21/11/2021
In a relation or table can have more than one choice of primary key, but only one of them set as a primary key. All the others keys which are able to declar ...
21
November, 2021
73    Arnab De    21/11/2021
A non-key attribute, whose values are derived from the primary key of another table, is known as foreign key.
21
November, 2021
83    Arnab De    21/11/2021
Sometimes more than one attribute needs to create a key that uniquely represents a tuple. That keys are known as a composite key or compound key.
21
November, 2021
softetechnologies
768    Arnab De    04/04/2018
We can create tables to store data using CREATE TABLE Statement in any RDBMS. This Statement is differ in different RDBMS.
04
April, 2018
801    Arnab De    28/03/2018
The full form of SQL is Structured Query Language. It is a language which handles the database, Specially RDBMS (Relational Database Management System)
28
March, 2018
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