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

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Databases Interview Questions

Questions Answers Views Company eMail

How many ways we can we find the current date using MySQL?

5 12934

How can increase the performance of MySQL select query?

RV Technologies, Span Systems,

3 12068

The structure of table view buyers is as follows: +----------------+-------------+------+-----+---------+----- -----------+ | Field | Type | Null | Key | Default | Extra | +----------------+-------------+------+-----+---------+----- -----------+ | user_pri_id | int(15) | | PRI | NULL | auto_increment | | userid | varchar(10) | YES | | NULL | | +----------------+-------------+------+-----+---------+----- -----------+ the value of user_pri_id the last row 2345 then What will happen in the following conditions? Condition1: Delete all the rows and insert another row then. What is the starting value for this auto incremented field user_pri_id , Condition2: Delete the last row(having the field value 2345) and insert another row then. What is the value for this auto incremented field user_pri_id

2 4936

What are the advantages and disadvantages of MySQL?

Satyam,

3763

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

Creative, Renault Nissan, Trikon Networks,

12 79392

What is the difference between char and varchar data types?

6 48276

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

Sasaa,

7 15940

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

Base2 Infotech, Webworks,

2 7823

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

7 11132

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

Google,

9 26591

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

10 26256

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 15057

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 4595

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 3834

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 11203

Un-Answered Questions { Databases }

Which sql server table is used to hold the stored procedure scripts?

1111

please explain.. DB architecture ...

2081

How is a developer added to a trusted publishers list?

888

How to populate a table in sql server?

995

What does dba stand for database?

652

Explain primary key in sql server?

1074

How do we display rows from the table without duplicates?

1019

What is thr feature of change data capture?

1037

How do I check mysql version?

1120

What are three advantages to using sql?

1071

You need to add a notnull column in a table by using alter command (without using default command). How would you do that?

1013

What do you mean by database normalization and why is it important?

What are all ddl commands?

1131

Write a code to select distinct records without using the DISTINCT keyword.

1186

how to convert dates to character strings? : Sql dba

1253

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