Most answered questions in Database

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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
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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 darklord
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Different subsets of SQL

The various subsets of SQL are as ...READ MORE

Sep 28, 2018 in Database by darklord
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2,109 views
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Auto Increment in SQL

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

Sep 27, 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 27, 2018 in Database by DataKing99
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98 views
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What does recursive stored procedure?

Recursive stored procedure refers to a stored ...READ MORE

Sep 26, 2018 in Database by darklord
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1,653 views
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What is the SQL query to get the third highest salary of an employee from employee_table

You can try out something like this: SELECT ...READ MORE

Sep 26, 2018 in Database by darklord
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482 views
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Write a SQL query to find the names of employees that begin with ‘S’

To display the name of the employees ...READ MORE

Sep 26, 2018 in Database by darklord
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55 views
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What are the ways to get the count of records in a table

To count the number of records in ...READ MORE

Sep 26, 2018 in Database by darklord
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96 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 darklord
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118 views
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IN vs OR in the SQL WHERE Clause

I assume you want to know the ...READ MORE

Sep 24, 2018 in Database by DataKing99
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41 views
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Reset a sequence in Oracle

You can try out something like this create ...READ MORE

Sep 24, 2018 in Database by DataKing99
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452 views
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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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570 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
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105 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
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Difference between single and double quotes in SQL

Single quotes are used to indicate the ...READ MORE

Sep 11, 2018 in Database by CodingByHeart77
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98 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 darklord
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400 views
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Find values in a comma separated string in a MySQL query

You can add commas to the left and ...READ MORE

Sep 10, 2018 in Database by darklord
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2,814 views
0 votes
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Different types of SQL Joins

The 4 main kinds of Joins present ...READ MORE

Sep 7, 2018 in Database by DataKing99
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164 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
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60 views
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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
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117 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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52 views
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What are stored procedures in database?

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

Sep 5, 2018 in Database by CodingByHeart77
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102 views
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Difference between primary key a composite key

Primary key is that column of the table ...READ MORE

Sep 5, 2018 in Database by CodingByHeart77
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1,810 views
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What is checkpoint in Database?

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

Sep 4, 2018 in Database by darklord
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223 views
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Fragmentation in Database

Fragmentation is a feature which controls the ...READ MORE

Sep 4, 2018 in Database by darklord
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36 views
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Explain Data Dictionary

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

Aug 30, 2018 in Database by CodingByHeart77
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57 views
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Data Independence & it's types

Data Independence refers to the ability to ...READ MORE

Aug 30, 2018 in Database by CodingByHeart77
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237 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
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84 views
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External and Managed Table : HIVE

The metadata information along with the table ...READ MORE

Aug 30, 2018 in Database by kurt_cobain
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56 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
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189 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
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32 views
0 votes
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Ways to improve query performance using Index hunting

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

Aug 29, 2018 in Database by CodingByHeart77
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103 views
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components of Hbase

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

Aug 27, 2018 in Database by kurt_cobain
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40 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
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202 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
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265 views
0 votes
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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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169 views
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What is Data partitioning?

This is the process of partitioning tables, ...READ MORE

Aug 22, 2018 in Database by DataKing99
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601 views
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Secondary index in Cassandra

Secondary indexes are indexes built over column ...READ MORE

Aug 21, 2018 in Database by kurt_cobain
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59 views
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Cassandra Data Model

Cassandra Data Model consists of four main ...READ MORE

Aug 21, 2018 in Database by kurt_cobain
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74 views
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Management Tools in Cassandra

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

Aug 21, 2018 in Database by kurt_cobain
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86 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
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47 views
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TRIGGERS used in MySQL tables

The following TRIGGERS are allowed in MySQL:  BEFORE ...READ MORE

Aug 21, 2018 in Database by CodingByHeart77
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32 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
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153 views
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Clustered vs Non-clustered Indexes

Clustered indexes - The indexes according to ...READ MORE

Aug 20, 2018 in Database by DataKing99
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39 views
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Indexes in Database

The index is a data structure that ...READ MORE

Aug 20, 2018 in Database by DataKing99
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62 views
0 votes
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What is schema?

The description of a database is called ...READ MORE

Aug 17, 2018 in Database by CodingByHeart77
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53 views
0 votes
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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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224 views
0 votes
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What is Data Redundancy?

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

Aug 16, 2018 in Database by darklord
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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
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64 views