Trending questions in Database

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Difference between STUFF & REPLACE function

STUFF Function: This function is used to ...READ MORE

Oct 10, 2018 in Database by CodingByHeart77
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What do you understand by Database Triggers?

A set of commands that automatically get ...READ MORE

Nov 14, 2018 in Database by Sahiti
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Can someone tell me what is IS NULL operator

Since it is not possible to test ...READ MORE

Nov 20, 2018 in Database by DataKing99
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Logical and Physical Plan : PIG Script

Logical and Physical plans are created during ...READ MORE

Sep 12, 2018 in Database by kurt_cobain
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Different types of a subquery

There are two types of subquery namely, ...READ MORE

Oct 18, 2018 in Database by DataKing99
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What is subquery in SQL?

A subquery is a query inside another ...READ MORE

Oct 12, 2018 in Database by DataKing99
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What are nested queries?

Nested queries are those queries which have an ...READ MORE

Nov 15, 2018 in Database by DataKing99
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What are the different authentication modes in SQL Server? How can it be changed?

Windows mode and Mixed Mode – SQL ...READ MORE

Oct 29, 2018 in Database by Sahiti
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Which one is suitable for real time big database- Primary Key or Unique Index?

What is a unique index? A unique index ...READ MORE

Oct 12, 2018 in Database by Frankie
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List the ways in which Dynamic SQL can be executed

Following are the ways in which dynamic ...READ MORE

Oct 26, 2018 in Database by DataKing99
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What is Proactive/Retroactive/Simultaneous Update

Proactive Update: The updates that are applied ...READ MORE

Aug 17, 2018 in Database by CodingByHeart77
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What is the need of MERGE statement?

This statement allows conditional update or insertion of ...READ MORE

Oct 23, 2018 in Database by DataKing99
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Different Types Of Index

There are three types of index namely: Unique ...READ MORE

Oct 11, 2018 in Database by DataKing99
 • 8,250 points • 1,618 views
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What is a Foreign key?

Foreign key maintains referential integrity by enforcing ...READ MORE

Oct 26, 2018 in Database by Sahiti
 • 6,370 points • 887 views
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ACID property in a database

ACID stands for Atomicity, Consistency, Isolation, Durability. It ...READ MORE

Oct 8, 2018 in Database by Sahiti
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Difference between clustered and non clustered index in SQL

The differences between the clustered and non ...READ MORE

Sep 28, 2018 in Database by Sahiti
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What is a Relationship and what are they?

Relation or links are between entities that ...READ MORE

Oct 23, 2018 in Database by DataKing99
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1 answer

How to connect to MySQL Database?

using MySql.Data; using MySql.Data.MySqlClient; namespace Data { ...READ MORE

Oct 12, 2018 in Database by Frankie
 • 9,830 points • 1,257 views
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What is Normalization of database?

Normalization is the process of organizing data ...READ MORE

Oct 8, 2018 in Database by DataKing99
 • 8,250 points • 1,332 views
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What is an ALIAS command?

The ALIAS name can be given to ...READ MORE

Oct 22, 2018 in Database by DataKing99
 • 8,250 points • 728 views
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1 answer

What is Denormalization?

Denormalization refers to a technique which is ...READ MORE

Oct 17, 2018 in Database by Sahiti
 • 6,370 points • 909 views
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STUFF and REPLACE function in SQL

STUFF Function: This function is used to ...READ MORE

Sep 28, 2018 in Database by DataKing99
 • 8,250 points • 1,731 views
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1 answer

Atomicity and Aggregation in Database

Atomicity is the condition where either all the ...READ MORE

Aug 22, 2018 in Database by DataKing99
 • 8,250 points • 3,290 views
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1 answer

How to do a batch insert in MySQL

You can try out the following query: INSERT ...READ MORE

Sep 10, 2018 in Database by Sahiti
 • 6,370 points • 2,448 views
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1 answer

Is there any boolean type in Oracle database?

Nope. I don't think there is one But ...READ MORE

Oct 10, 2018 in Database by Neha
 • 6,300 points • 1,098 views
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1 answer

What is a covered Index?

A covering index is an index that contains all ...READ MORE

Oct 10, 2018 in Database by Frankie
 • 9,830 points • 929 views
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2 answers

Types of relationships in Database

There are 3 types of relationships in ...READ MORE

Aug 17, 2018 in Database by zombie
 • 3,790 points • 3,127 views
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1 answer

Ways to improve query performance using Index hunting

Index hunting help in improving query performance ...READ MORE

Aug 29, 2018 in Database by CodingByHeart77
 • 3,750 points • 2,561 views
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1 answer

Clause in SQL

SQL clause helps to limit the result ...READ MORE

Oct 8, 2018 in Database by DataKing99
 • 8,250 points • 791 views
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Collation in Database

Collation is defined as a set of ...READ MORE

Oct 9, 2018 in Database by DataKing99
 • 8,250 points • 717 views
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How do I enable Oracle automatically on systemboot?

To enable the database service to start ...READ MORE

Oct 5, 2018 in Database by Frankie
 • 9,830 points • 864 views
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1 answer

Difference between Inner Join & Outer Join

The difference is as follows: INNER JOIN: Returns all those ...READ MORE

Sep 7, 2018 in Database by DataKing99
 • 8,250 points • 1,883 views
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1 answer

What is checkpoint in Database?

Checkpoint declares a point before which all ...READ MORE

Sep 4, 2018 in Database by Sahiti
 • 6,370 points • 1,956 views
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HLog and WAL in Hbase.

All edits in the HStore are stored ...READ MORE

Jul 16, 2018 in Database by Data_Nerd
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Debugging tools: PIG

explain utility is helpful for Hadoop developers ...READ MORE

Sep 12, 2018 in Database by kurt_cobain
 • 9,350 points • 1,473 views
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Auto Increment in SQL

Auto increment keyword allows the user to ...READ MORE

Sep 28, 2018 in Database by DataKing99
 • 8,250 points • 681 views
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DELETE vs TRUNCATE vs DROP command

After the execution of ‘DELETE’ operation, COMMIT ...READ MORE

Aug 23, 2018 in Database by CodingByHeart77
 • 3,750 points • 2,125 views
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When is the functional dependency known as fully functional dependency?

The criteria of fully functional dependency, is ...READ MORE

Aug 10, 2018 in Database by DataKing99
 • 8,250 points • 2,667 views
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Why is not preferable to use mysql_* functions in PHP?

The reasons are as follows: The MySQL extension: Does ...READ MORE

Sep 7, 2018 in Database by DataKing99
 • 8,250 points • 1,414 views
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Hcatalog in HIVE

HCatalog supports reading and writing files in ...READ MORE

Aug 30, 2018 in Database by kurt_cobain
 • 9,350 points • 1,628 views
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1 answer

What are stored procedures in database?

A stored procedure is a collection of ...READ MORE

Sep 6, 2018 in Database by CodingByHeart77
 • 3,750 points • 1,226 views
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1 answer

Types of tables in MySQL

MyISAM is the default table that is ...READ MORE

Aug 21, 2018 in Database by CodingByHeart77
 • 3,750 points • 1,806 views
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Is SELECT * harmful in Database?

There are really three major reasons: Inefficiency in ...READ MORE

Sep 7, 2018 in Database by DataKing99
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Can different databases use different name quotes?

This use of quotes is called delimited ...READ MORE

Sep 11, 2018 in Database by CodingByHeart77
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What are stored procedures?

The stored procedure is a collection of ...READ MORE

Aug 23, 2018 in Database by CodingByHeart77
 • 3,750 points • 1,568 views
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Common Hive Services

The following are commonly used services of ...READ MORE

Aug 30, 2018 in Database by kurt_cobain
 • 9,350 points • 1,073 views
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Explain Data Dictionary

Data dictionary is a set of information ...READ MORE

Aug 30, 2018 in Database by CodingByHeart77
 • 3,750 points • 1,010 views
0 votes
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Buckets in HIVE

There are two main reasons for performing bucketing ...READ MORE

Aug 30, 2018 in Database by kurt_cobain
 • 9,350 points • 1,005 views
0 votes
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components of Hbase

Apache HBase Consists of the following main ...READ MORE

Aug 28, 2018 in Database by kurt_cobain
 • 9,350 points • 1,022 views
0 votes
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Tunable Consistencies in Cassandra

Tunable Consistency is a phenomenal characteristic that ...READ MORE

Aug 21, 2018 in Database by kurt_cobain
 • 9,350 points • 1,279 views
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