Most viewed questions in Database

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Advantages and Disadvantages of Stored Procedure

https://www.quora.com/What-are-the-advantages-of-using-an-SQL-store ...READ MORE

Apr 29, 2019 in Database by anonymous
11,751 views
0 votes
3 answers

MySQL "Could not create connection to database serve" error

Pls check that you have MySQL server ...READ MORE

Jul 3 in Database by anonymous
11,454 views
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1 answer

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 Sahiti
• 6,320 points
7,344 views
+1 vote
1 answer

Difference between cross join and natural join

The cross join produces the cross product ...READ MORE

Oct 12, 2018 in Database by DataKing99
• 8,210 points
7,058 views
0 votes
1 answer

ORA-12514 TNS:listener does not currently know the service requested in connect descriptor

I had this issue and the fix ...READ MORE

Oct 8, 2018 in Database by Frankie
• 9,810 points
6,981 views
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1 answer

Difference between primary key a composite key

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

Sep 5, 2018 in Database by CodingByHeart77
• 3,720 points
6,430 views
0 votes
1 answer

What does recursive stored procedure?

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

Sep 26, 2018 in Database by Sahiti
• 6,320 points
4,629 views
0 votes
1 answer

Different subsets of SQL

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

Sep 28, 2018 in Database by Sahiti
• 6,320 points
4,589 views
0 votes
3 answers

What is Phantom deadlock?

To understand phantom deadlock, you need an ...READ MORE

Feb 13, 2019 in Database by Ravi kumar
3,944 views
0 votes
2 answers

Durable Writes in Cassandra

When Cassandra write: 1. memtable (in memory) 2. commit ...READ MORE

Nov 25, 2018 in Database by Amit
• 180 points
3,382 views
0 votes
2 answers

How to select the nth row in a SQL database table?

SELECT * FROM ( SELECT ID, NAME, ROW_NUMBER() ...READ MORE

Apr 23 in Database by anand
• 140 points
3,381 views
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1 answer

What are the different types of index?

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

Oct 17, 2018 in Database by Sahiti
• 6,320 points
3,373 views
0 votes
1 answer

MySQL Error: : 'Access denied for user 'root'@'localhost'

Hello @kartik, I did this to set my ...READ MORE

May 4 in Database by Niroj
• 58,960 points
3,358 views
0 votes
1 answer

Data Independence & it's types

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

Aug 30, 2018 in Database by CodingByHeart77
• 3,720 points
3,091 views
0 votes
1 answer

What are VDL and SDL?

VDL(View Definition Language): Represents user views and ...READ MORE

Nov 13, 2018 in Database by DataKing99
• 8,210 points
2,674 views
0 votes
1 answer

What is Data partitioning?

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

Aug 22, 2018 in Database by DataKing99
• 8,210 points
2,456 views
0 votes
1 answer

What are the advantages of SQL?

Simple SQL queries can be used to ...READ MORE

Nov 8, 2018 in Database by DataKing99
• 8,210 points
2,109 views
0 votes
1 answer

Reset a sequence in Oracle

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

Sep 24, 2018 in Database by DataKing99
• 8,210 points
2,074 views
0 votes
1 answer

Filters in HBase

ColumnPrefixFilter: takes a single argument, a column ...READ MORE

Jul 31, 2018 in Database by kurt_cobain
• 9,320 points
2,009 views
0 votes
1 answer

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 Sahiti
• 6,320 points
1,950 views
0 votes
1 answer

How to schedule a job for SQL query to run daily?

down voteaccepted Expand the SQL Server Agent node ...READ MORE

Oct 25, 2018 in Database by Frankie
• 9,810 points
1,869 views
0 votes
1 answer

List few commands of DDL, DML, and DCL.

The list of commands is as follows:  Data ...READ MORE

Nov 12, 2018 in Database by Sahiti
• 6,320 points
1,831 views
0 votes
1 answer

MSSQL installation fails at mssql-conf setup

Hi @Denis!  The problem has occurred due to the ...READ MORE

Mar 21, 2019 in Database by Omkar
• 69,030 points
1,577 views
0 votes
1 answer

What are the manipulation functions in SQL?

There are three case manipulation functions in ...READ MORE

Oct 11, 2018 in Database by DataKing99
• 8,210 points
1,495 views
0 votes
1 answer

Difference between single and double quotes in SQL

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

Sep 11, 2018 in Database by CodingByHeart77
• 3,720 points
1,278 views
0 votes
1 answer

Install DB2 on windows

Hey @Alok, follow these instructions: On the DB2 ...READ MORE

Mar 20, 2019 in Database by Kavyashri
1,242 views
0 votes
1 answer

Which operator is used in the query for pattern matching?

LIKE operator is used for pattern matching, ...READ MORE

Oct 15, 2018 in Database by DataKing99
• 8,210 points
1,229 views
+1 vote
1 answer

What are the features of MySQL?

The features of MySQL are as follows: Ease ...READ MORE

Dec 12, 2018 in Database by DataKing99
• 8,210 points
1,163 views
0 votes
1 answer

What is DML Compiler?

DML compiler translates DML statements in a ...READ MORE

Nov 9, 2018 in Database by Sahiti
• 6,320 points
1,159 views
0 votes
1 answer

What is DDL interpreter?

DDL Interpreter interprets the DDL statements and ...READ MORE

Nov 8, 2018 in Database by DataKing99
• 8,210 points
1,136 views
0 votes
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
1,051 views
0 votes
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
• 6,320 points
1,046 views
0 votes
1 answer

What is Index hunting?

Index hunting is the process of boosting ...READ MORE

Nov 9, 2018 in Database by DataKing99
• 8,210 points
965 views
0 votes
1 answer

Logical and Physical Plan : PIG Script

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

Sep 12, 2018 in Database by kurt_cobain
• 9,320 points
965 views
0 votes
1 answer

What are the ways of Data Import and Export in MySQL Workbench?

There are majorly three ways to export ...READ MORE

Dec 14, 2018 in Database by DataKing99
• 8,210 points
930 views
0 votes
1 answer

Difference between STUFF & REPLACE function

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

Oct 10, 2018 in Database by CodingByHeart77
• 3,720 points
882 views
0 votes
1 answer

Which is better database vs. flat files?

Difference between database and flat files are ...READ MORE

Oct 11, 2019 in Database by Omaiz
• 560 points
858 views
0 votes
1 answer

How to check if a table exists in a given schema

Since you havent mentioned the DBMS in ...READ MORE

Oct 4, 2019 in Database by Daric
• 500 points
845 views
0 votes
1 answer

Standalone Mode in Hbase

It is a default mode of HBase. ...READ MORE

Jul 11, 2018 in Database by kurt_cobain
• 9,320 points
819 views
0 votes
1 answer

Can I have multiple primary keys in a single table?

A Table can have a Composite Primary Key which ...READ MORE

Oct 25, 2018 in Database by Frankie
• 9,810 points
761 views
0 votes
1 answer

Unable to uninstall MongoDB

Try apt-get --reinstall install mongodb This will pretend that ...READ MORE

Mar 15, 2019 in Database by Jobin
750 views
0 votes
1 answer

ERROR 1006 (HY000): Can't create database 'test' (errno: 2) in mysql

Hi@akhtar, You have to change the permissions or ...READ MORE

Apr 14 in Database by MD
• 57,060 points
731 views
0 votes
1 answer

Database Repair Options in Cassandra

Anti Entropy: Anti-entropy Repair is a process of ...READ MORE

Jun 28, 2018 in Database by kurt_cobain
• 9,320 points
726 views
+1 vote
1 answer

DELETE vs TRUNCATE vs DROP command

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

Aug 23, 2018 in Database by CodingByHeart77
• 3,720 points
717 views
0 votes
1 answer

Fetch first 5 characters of the string

There are a lot of ways to ...READ MORE

Oct 22, 2018 in Database by DataKing99
• 8,210 points
709 views
0 votes
1 answer

What are set operations used in database?

There are mainly three set operations: UNION, ...READ MORE

Nov 19, 2018 in Database by Sahiti
• 6,320 points
661 views
0 votes
1 answer

What is checkpoint in Database?

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

Sep 4, 2018 in Database by Sahiti
• 6,320 points
613 views
0 votes
1 answer

Python Stress Test

Cassandra comes with a popular utility called ...READ MORE

Jun 29, 2018 in Database by Data_Nerd
• 2,390 points
613 views
0 votes
1 answer

Error Code: 2020. Lost connection to MySQL server during query

Hello @kartik, I got the same issue when ...READ MORE

May 4 in Database by Niroj
• 58,960 points
602 views
0 votes
1 answer

What is Proactive/Retroactive/Simultaneous Update

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

Aug 17, 2018 in Database by CodingByHeart77
• 3,720 points
601 views