Trending questions in Database

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Comments in MySQL

Like any other programming language, there are ...READ MORE

Nov 26, 2018 in Database by DataKing99
 • 8,250 points • 1,323 views
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What is HAVING Clause in MySQL?

Since the WHERE keyword cannot be used with aggregate ...READ MORE

Nov 21, 2018 in Database by Sahiti
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What is Database transaction?

The sequence of operation performed which changes ...READ MORE

Nov 14, 2018 in Database by Sahiti
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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
 • 8,250 points • 3,190 views
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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
 • 6,370 points • 1,701 views
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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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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
 • 9,830 points • 3,057 views
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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
 • 6,370 points • 2,309 views
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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
 • 8,250 points • 1,382 views
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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
 • 3,750 points • 5,217 views
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Atomicity and Aggregation in Database

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

Aug 22, 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
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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
 • 6,370 points • 3,042 views
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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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ACID property in a database

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

Oct 8, 2018 in Database by Sahiti
 • 6,370 points • 2,745 views
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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 • 2,233 views
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1 answer

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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What is a Foreign key?

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

Oct 26, 2018 in Database by Sahiti
 • 6,370 points • 1,567 views
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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 • 3,424 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
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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
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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 • 4,401 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 • 1,988 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
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What is Denormalization?

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

Oct 17, 2018 in Database by Sahiti
 • 6,370 points • 1,577 views
0 votes
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 • 1,814 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 • 3,546 views
0 votes
1 answer

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 • 1,769 views
0 votes
1 answer

Clause in SQL

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

Oct 8, 2018 in Database by DataKing99
 • 8,250 points • 1,589 views
0 votes
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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 • 2,925 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 • 1,422 views
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1 answer

HLog and WAL in Hbase.

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

Jul 16, 2018 in Database by Data_Nerd
 • 2,390 points • 5,091 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 • 2,830 views
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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 • 2,487 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 • 2,639 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 • 1,533 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 • 2,989 views
0 votes
1 answer

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 • 3,537 views
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1 answer

Hcatalog in HIVE

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

Aug 30, 2018 in Database by kurt_cobain
 • 9,350 points • 2,620 views
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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 • 2,158 views
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1 answer

Is SELECT * harmful in Database?

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

Sep 7, 2018 in Database by DataKing99
 • 8,250 points • 2,049 views
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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
 • 3,750 points • 1,863 views
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Types of tables in MySQL

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

Aug 21, 2018 in Database by CodingByHeart77
 • 3,750 points • 2,733 views
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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 • 2,474 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 • 1,961 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 • 2,310 views
0 votes
1 answer

Management Tools in Cassandra

DataStaxOpsCenter: internet-based management and monitoring solution for ...READ MORE

Aug 21, 2018 in Database by kurt_cobain
 • 9,350 points • 2,215 views
0 votes
1 answer

Buckets in HIVE

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

Aug 30, 2018 in Database by kurt_cobain
 • 9,350 points • 1,841 views
0 votes
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What is Data Redundancy?

Duplication of data in the database is ...READ MORE

Aug 17, 2018 in Database by Sahiti
 • 6,370 points • 2,398 views
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