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,

3694

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

Creative, Renault Nissan, Trikon Networks,

12 78923

What is the difference between char and varchar data types?

6 47990

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

Sasaa,

7 15609

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

Base2 Infotech, Webworks,

2 7706

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

7 10888

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

Google,

9 26213

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

10 25880

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 14838

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 4502

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 3747

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 11013

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

2 8380

Explain MySQL optimization?

1 6058

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 9735

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Un-Answered Questions { MySQL }

How do I download a mysql community server?

875

How to returns the columns and column information pertaining to the designated table.

1015

Can mysql and mariadb coexist?

1084

What are the differences between char and nchar?

1081

What are the 'mysql' command line options?

981

Write a query to find duplicate rows in table?

898

Is mysql and sql are same?

1060

What is mysql connection limit?

924

What language does mysql use?

874

What is mysql and why it is used?

1074

How do you select a table?

943

How do I start and stop mysql on windows?

999

What is the latest mysql version?

999

What are numeric data types?

978

Is sql and mysql same?

918

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