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Which type of index physically orders the rows in a table?

Posted By :Shashi Ray     Posted Date :September 10, 2008    Points :10   Category :Sql Server 
Clustered index

You can also find related Interview Question to Which type of index physically orders the rows in a table?  below: 

How many ways return rows from one table not in another table?

  
There are at least 5 ways to return data from one table which is not in another table. Two of these are SQL Server 2005 and greater only

1)NOT IN

2)NOT EXISTS

3)LEFT and RIGHT JOIN

4)OUTER APPLY (2005+)

5)EXCEPT (2005+)

(More...)

how many clustered and non-clustered index can a table have

  
In SQL 2005 and earlier there was a limitation of 250 indexes per table, one clustered and 249 non-clustered. In SqL 2008, with the addition of filtered indexes, that limitation was increased to 1000, one clustered and 999 non-clustered indexes. (More...)

Deleting Duplicates rows from the table?

  
delete from Employee where(EmpId Not In(Select Max(EmpId) from Employee Group By EmpName
-------------------------------
Note: EmpId Should Be identity column means Autogenerated column (More...)

How To Know Which Index A Table Is Using?

  
SELECT table_name,index_name FROM user_constraints (More...)

What is a table called, if it does not have neither Cluster nor Non-cluster Index? What is it used for?

  
Unindexed table or Heap. Microsoft Press Books and Book On Line (BOL) refers it as Heap.
A heap is a table that does not have a clustered index and, therefore, the pages are not linked by
pointers. The IAM pages are the only structures that link the pages in a table together.
Unindexed tables are good for fast storing of data. Many times it is better to drop all indexes from table and than do bulk of inserts and to restore those indexes after that. (More...)

What are the index combination's a table can have?

  
? Indexes
? A clustered index
? A clustered index and many nonclustered indexes
? A nonclustered index
? Many nonclustered indexes
(More...)

What are the different index configurations a table can have?

  
A table can have one of the following index configurations:

No indexes
A clustered index
A clustered index and many nonclustered indexes
A nonclustered index
Many nonclustered indexes (More...)

How to delete duplicate rows from table in sql

  
One can achieve this like below-

DELETE FROM table_name A WHERE ROWID > (
SELECT min(rowid) FROM table_name B
WHERE A.key_values = B.key_values); (More...)

Difference between type constructor and instance constructor? What is static constructor, when it will be fired? And what is its use?

  
(Class constructor method is also known as type constructor or type initializer)
Instance constructor is executed when a new instance of type is created and the class constructor is executed after the type is loaded and before any one of the type members is accessed. (It will get executed only 1st time, when we call any static methods/fields in the same class.) Class constructors are used for static field initialization. Only one class constructor per type is permitted, and it cannot use the vararg (variable argument) calling convention. (More...)

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