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Databases Interview Questions
Questions Answers Views Company eMail

how you will identify the mapping level bottleneck ? if there is a mapping level bottleneck then how will you try to improve the mapping

 1936

what is the out put of below queries? a. select * from Emp where null = null; b. select * from Emp where 1=1;

Patni,

13 24415

what are the joins,primary key,foriegn key, candidate key, super key and expain them?

Polaris,

6 17041

diff between DELETE and TRUNCATE?.

HCL, Yalamanchili Software,

14 22666

explain different types of jions with examples briefly?

Zensar,

1 6475

explain different types of jions with examples briefly?

Accenture, Excellence, Zensar,

2 8911

explain different types of jions with examples briefly?

Zensar,

3 10473

Q1:code to connect to sql server(database) through jdbc application. Q2:code to connect to Mysql(database) through jdbc application. Q3:code to connect to oracle(database) through jdbc application.

 1 4150

difference between oracle8i and oracle9i

NIIT,

4 10134

can we call functions from stored procedure in SQL Server 2005 ? How?

 3 11921

What is the difference between two queries: 1. SELECT * FROM table WHERE 1=1; 2. SELECT * FROM table

HP,

17 49940

what is the difference b/w oracle8i and oracle9i

iGate,

3 6430

What is the usage of NVL?

Infosys, Micro Infotek,

7 21180

We create an index to fast the search. How it fast the query? Do we write any special keyword with query?

 3 5707

SQL stops working in every 15 days displaying message that database log file is full. Log file size is 3.95 GB. It is happening after shrinking the database also. What is solution to overcome this problem. Please help me as it's urgent.

 5 8080

Un-Answered Questions { Databases }

What is a oracle database?

1059

What is an oracle database table?

1017

How to return the date part only from a sql server datetime datatype?

1107

What are the disadvantages of not performing database normalization?

1167

What are the properties of a transaction?

1130

What is 1nf?

968

What is orm in mysql?

913

How to write an inner join with the where clause in oracle?

1047

How to make a copy values from one column to another in mysql?

1037

What is sql mysql pl sql oracle?

1075

Why do we need database?

920

What is system global area (sga) in oracle?

995

What action plan is preferred if sql server is not responding?

1105

What are the original export and import utilities?

1175

How do you rename a database?

913

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