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MySQL Interview Questions
Questions Answers Views Company eMail

What are the advantages and disadvantages of MySQL?

Satyam,

3146

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

Creative, Renault Nissan, Trikon Networks,

12 74530

What is the difference between char and varchar data types?

 6 46130

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

Sasaa,

7 13342

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

Base2 Infotech, Webworks,

2 6699

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

 7 8820

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

Google,

9 23755

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

 10 22621

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 13131

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 3857

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 3085

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 9416

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

 2 7350

Explain MySQL optimization?

 1 5318

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 8330

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Un-Answered Questions { MySQL }

What does innodb stand for?

519

What is a trigger? How you can create a trigger in mysql?

479

How to convert dates to character strings?

530

How do I view mysql logs?

480

What is the use of innodb in mysql?

470




How to use regular expression in pattern match conditions?

513

What is regex in mysql?

527

why not null is not allowed at table level

2284

how you will Create a database on the mysql server with unix shell.

548

Is primary key auto increment?

517

What is the usage of "i-am-a-dummy" flag in mysql?

663

How do I know if mysql is installed on windows?

473

What is dblink?

478

Does mysql automatically index foreign keys?

483

What is the return type of mysqli_query?

458

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