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Databases Interview Questions
Questions Answers Views Company eMail

how can a session indicate its interest in receiving alerts?

Oracle,

1042

how does an oracle clusterware manage crs resources?

Oracle,

1085

what are the performance views in an oracle rac environment?

Oracle,

1053

who owns the operating system files created by the utl_file package?

Oracle,

1072

how can you initialize log miner?

Oracle,

1143

What is the difference between online and offline backups?

MCN Solutions,

1058

what is the difference between restoring and recovering?

MCN Solutions,

1011

What is Difference Between Unique and Primary Key Constraints?

Wipro,

1105

What is a Mapplet?

Informatica,

1120

What are the most common interview questions on ETL Testing for experience?

 1143

If you're given a raw data table, how would perform etl (extract, transform, load) with sql to obtain the data in a desired format?

Facebook,

967

how would you write a sql query to compute a frequency table of a certain attribute involving two joins? What changes would you need to make if you want to order by or group by some attribute? What would you do to account for nulls?

Facebook,

1629

how would you improve etl (extract, transform, load) throughput?

LinkedIn,

1026

define and explain the differences between clustered and non-clustered indexes.

Microsoft,

1194

what are the different ways to return the rowcount of a table?

Microsoft,

1000

Un-Answered Questions { Databases }

Explain the use of decode function

1

What are the two types of data independence?

1130

What is mysqli_free_result?

903

How to use multiple database server in back end ?

1044

What is an Oracle Data Dictionary?

1108

Why sql query is slow?

997

What is mdf ldf and ndf?

999

What is the default port of mysql server?

1034

What are the examples of database management system?

871

Is microsoft access being phased out?

866

Which is faster mysql or postgresql?

843

Explain the collation?

1106

What do you mean by SQL injection attack?

1066

When should you use an instead of trigger?

955

What does the sign mean in sql?

989

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