what is the use of database index(apart from the last
searching of records) and what is the use of composite key?
Answer / brijesh kumar
Index is used for fast retrival data from a table. There are
two types of index
1.clustered Index
2.Non-clustered Index
1. clustered index is created on primary key and it can be
only on per table
2.Non-clustered Index can be created any column and it can
be more than one in a table
Composite key:- Composite is the combination of more than
one attribute composite key is created when it is not
possible to identify any column in a table that has unique
value in such
a situation combination of more than column is chosen by
which
record can be identify easly clear it is just like primary
key.
Is This Answer Correct ? | 12 Yes | 0 No |
What are temporal tables in sql server 2016?
What do you understand by a stored procedure?
What is the difference between MVC and Teir Architecher? Plz explain with Layyered Programming example...? Thanks
What are constraints in microsoft sql server?
How do you use a subquery to find records that exist in one table and do not exist in another?
What is 1nf 2nf and 3nf?
What is the difference between stored procedure and user defined functions?
what is sql server? : Sql server database administration
How to use values from other tables in update statements in ms sql server?
What is one of the first things you would do to increase performance of a query? For example, a boss tells you that ?a query that ran yesterday took 30 seconds, but today it takes 6 minutes?
2 Answers Accenture, Merrill Lynch, Wipro,
what operator performs pattern matching?
How we Resize table,temp table, database and log file size in SQL Server 2005