Answer / nusret sevinc

A primary index is an index on a set of fields that includes
the unique primary
key for the field and is guaranteed not to contain
duplicates. A secondary index
is an index that is not a primary index and may have
duplicates. Two entries are
said to be duplicates if they have the same value for the
search key field associated
with the index.

Answer / roshan jha

The index in which the sort order of a search key is similar
to the sort order of a relation then the index is called
primary index.Ex.front index of the book.
While in secondary index the order of the search key is in
different order from the order of the key in file.eg.index
in back side of some book.
Two entries are said to be duplicate if have same
value for the search key field associated.primary index
doesnot have duplicates.

Answer / sanjib sarkar

Index is a set of <KEY,ADDRESS> pair. Now in the case of
Primary Index both keys and addresses of the records are
kept in order to search a particular record faster but in
the case of Secondary Index only the addresses of the
records are kept in the index not the key.

Answer / khadija

1.A primary index is an index on a set of fields that includes the unique primary key for the field and is guaranteed not to contain duplicates. A Secondary index is an index that is not a primary index and may have duplicates.
2.Example,
Employee ID can be Example of it. Example,
Employee name can be example of it. Because Employee name can have similar values.
3.The primary index contains the key fields of the table. The primary index is automatically created in the database when the table is activated. If a large table is frequently accessed such that it is not possible to apply primary index sorting, you should create secondary indexes for the table.
4.The index in which the sort order of a search key is similar
to the sort order of a relation then the index is called
primary index. Ex, front index of the book. While in secondary index the order of the search key is in
different order from the order of the key in file. Ex, index
in back side of some book.
5.In the case of
Primary Index both keys and addresses of the records are
kept in order to search a particular record faster. In the case of Secondary Index only the addresses of the
records are kept in the index not the key.
6.There can be only one primary index. There can be many secondary indices.

Answer / dinesh uikey

The primary index is on the field which specifies the
sequential order
of the file. There can be only one primary index while there
can be many
secondary indices.

What are the disadvantages of cursors? How can you avoid cursors?

2 Answers  

agregator gives one to many records or many to one record

1 Answers   IBM,

What are the three basic rules which are to be followed for the relational model of the database?

0 Answers  

How to combine two function together?

0 Answers  

The count() function always returns a int value type what should you do if you need to count rows from a query which you know will return a value that is too large for an int value type?

0 Answers  

Given an employee table, how would you find out the second highest salary?

9 Answers  

A) Which two are benefits of Teradata's support for ANSI Standard SQL? (Choose two.) 1.data is distributed automatically 2.queries get optimized to better plans 3.submit queries from other database systems 4.can interface with BI tools B) Which statement is true when comparing the advantages of third normal form to star schema? 1.Star schema tends to have fewer entities. 2.Star schema requires additional data storage. 3.Third normal form tends to have fewer entities. 4.Third normal form requires additional data storage. C)Which two sets of functions does the Parsing Engine (PE) perform? (Select two.) 1.sorting, formatting, and aggregating of the final answer set 2.flow control of the data to and from the participating tables 3.SQL statement interpretation, syntax validation, and semantic evaluation 4.dispatching the step execution sequence to the AMP via the BYNET D) Which two can be achieved with Teradata Active System Management (TASM)? (Choose two.) 1.disable hardware 2.react to hardware failure 3.influence response times 4.collect metadata E) Which three mechanisms can be used to ensure security within the Teradata Database? (Choose three.) 1.views 2.spool limits 3.roles 4.access rights 5.profiles

0 Answers  

How can you log an error to the server event log from a stored procedure?

0 Answers  

How long can an error message be in raiseerror function?

0 Answers  

What are the key features of dbms?

0 Answers  

Does QTP Support the Propjects which are running in Dot Net? As we are starting with new project in Dot net need to use automation tool?Please advice & let me know what would be the best.

0 Answers  

You are testing the performance of a query the first time you run the query, the performance is slow. the second time you run the query, the performance is fast. why is this?

0 Answers