MySQL Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

MySQL Interview Questions

Questions Answers Views Company eMail

What are the advantages and disadvantages of MySQL?

Satyam,

3699

What is the difference between GROUP BY and ORDER BY in Sql?

Creative, Renault Nissan, Trikon Networks,

12 78988

What is the difference between char and varchar data types?

6 48033

How to load data from a text file into a table?

Sasaa,

7 15655

How can we know the number of days between two given dates using MySQL?

Base2 Infotech, Webworks,

2 7720

How can we change the name of a column of a table?

7 10922

How can we change the name and data type of a column of a table?

Google,

9 26276

What are the differences between drop a table and truncate a table?

10 25944

A select query over a large table runs very slow because of the growing number of entries in that table. What different measures could be taken to improve speed?

5 14858

A company wants to store their invoices in a database. They already have their customers and articles in that database. Both customer and article are each identified by an unique integer value. Please create the SQL statements for creating the necessary table(s) for storing the invoices in a MySQL database. An invoice should hold information like invoice number, customer, date, article(s) and quantity etc.

1 4510

For the database from the previous question, please give an SQL query which returns the invoice number of all invoices which contain the article with the number ?1234?. The query should be able to run under a MySQL 4.0 database.

1 3764

How would you backup and restore a big MySQL database? What are the advantages of the approach which you have taken over the others?

4 11034

What are the differences between MySQL_fetch_array(), MySQL_fetch_object(), MySQL_fetch_row()?

2 8406

Explain MySQL optimization?

1 6068

The table tbl_sites contains the following data: ----------------------------------------------------- Userid sitename country ------------------------------------------------------ 1 sureshbabu indian 2 PHPprogrammer andhra 3 PHP.net usa 4 PHPtalk.com germany 5 MySQL.com usa 6 sureshbabu canada 7 PHPbuddy.com pakistan 8. PHPtalk.com austria 9. PHPfreaks.com sourthafrica 10. PHPsupport.net russia 11. sureshbabu australia 12. sureshbabu nepal 13. PHPtalk.com italy Write a select query that will displayed the duplicated site name and how many times it is duplicated?

Afixi, GE,

4 9764

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Un-Answered Questions { MySQL }

How do I set user privileges in mysql?

889

How do you rename a table in mysql?

1026

List data types in mysql? Explain

919

What is the use of count function in mysql?

1029

How we can see all indexes defined for a table in mysql?

936

Is mysql server free?

929

What is the difference between having and where clause in mysql? Explain

1018

How to get a version of mysql?

1044

How many concurrent queries can mysql handle?

895

How to store binary data in mysql?

1000

What is max connection in mysql?

931

What is information_schema in mysql?

991

How do I make an action query?

932

What is triggers and how it can be used in mysql?

971

How to set the time zone for MySQL to particular country time?

3199

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