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Disadvantage of Index in Sql Server?
Posted By :
Posted Date :
September 22, 2010
It will allocate space in memory for each and every index.
It will increase the weight of the table, hence it would degrade
the performance of the data manipulations like Insert/ Update and
You can also find related Interview Question to
Disadvantage of Index in Sql Server?
Which index option causes SQL Server to create an index with empty space on
the leaf level of the index?
Disadvantage in File Processing System in SQL Server?
Disadvantage in File Processing System in .SQL Server are
Difficult in accessing data.
Data redundancy & inconsistency.
Data isolation and integrity.
Concurrent access is not possible.
You work for a bank that uses a SQL Server 2005 database to store line items from customer banking transactions. The bank processes 50,000 transactions every day. The application requires a clustered index on the TransactionID column. You need to create a
table that supports an efficient reporting solution that queries the transactions by date.What are the two ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
A. Place a nonclustered index on the date column.
B. Add a unique clustered index on the date column
C. Map each partition to a filegroup, with each filegroup accessing a different physical
D. Create a partitioning scheme that partitions the data by date.
What is the purpose of an Index in SQL Server.
An index is used when we need a bookmark for our table. They are just used to speed up searches/queries.
A clustered index physically sorts the data in a table.The value of a clustered index is a key-value pair,where key is the index key and value is the actual value.
Non- Clustered Index:
A non-clustered index sorts the data logically but not physically.The value of a non-clustered index is not the data but a pointer to the data page.So, we can say a non-clustered index is dependent on the clustered index.In the absence of clustered index, it refers a physical location in the Heap for value.
Database Concurrency in Sql Server.
When two or more user try to update same type of data in a table then Database Concurrency helps in this situation.
There are 2 types of Database Concurrency
Pessimistic: When one user try to change the data with pessimistic concurrency then a lock is placed on the data in a table so that another user cannot change data. when one user finishes then other user can able to change.
Optimistic: When two user works on the same data in a table and one change that data first then second user cannot change that same data becasue the which he have using is allready changed so he cannot do the change becasue change apply to another data that is changed by first user.
Is it true that COM objects no longer need to be registered on the server?
Yes and No. Legacy COM objects still need to be registered on the server before they can be used. COM developed using the new .NET Framework will not need to be registered. Developers will be able to auto-register these objects just by placing them in the 'bin' folder of the application.
What are server controls?
ASP.NET server controls are components that run on the server and encapsulate user-interface and other related functionality. They are used in ASP.NET pages and in ASP.NET code-behind classes.
Which type of index physically orders the rows in a table?
Which levels of the index can have multiple pages?
What is a Index?
To execute the Quesry faster
What do you need to specify to create a linked server?
OLE DB Data Source
When do you need to specify an external data source by using a linked server?
When you need to access a different instance.
Which authentication mode lets you use both SQL Server logins and Windows logins?
Mixed Mode authentication mode lets you use both SQL Server logins and Windows logins?
What is an Index?
When queries are run against a db, an index on that db basically helps in the way the data is sorted to process the query for faster and data retrievals are much faster when we have an index.
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