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 78935

What is the difference between char and varchar data types?

6 47998

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

Sasaa,

7 15617

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

Base2 Infotech, Webworks,

2 7709

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

7 10897

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

Google,

9 26216

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

10 25883

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 14844

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 4503

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 3754

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 11014

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

2 8383

Explain MySQL optimization?

1 6063

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 9736

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Un-Answered Questions { MySQL }

How to dump a table from a database.

1013

How much does mysql enterprise cost?

915

How do you know if your mysql server is alive?

1066

What are the different data types in mysql?

919

What is truncate command?

940

What is append query?

908

Write a command to list all databases in mysql?

1035

Is mysql a nosql database?

1116

How can you retrieve a particular number of records from a table?

930

What is database migration in mysql?

1013

How do I find mysql version in mysql workbench?

930

Is mysql query case sensitive?

960

Can we join 3 tables in mysql?

938

why not null is not allowed at table level

2752

How to dump a table to a file with 'mysqldump'?

1020

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