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

Oracle (3253)
SQL Server (4518)
MS Access (429)
MySQL (1402)

Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)

DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
IBM Informix (50)

Neo4j (82)
InfluxDB (0)
Apache CouchDB (44)
Firebird (5)

Database Management (1411)
Databases AllOther (288)

Databases Interview Questions

Questions Answers Views Company eMail

How many byte Unique integers does OIDs in PostgreSQL have?

1359

What is the command that can be used to allocate memory in postgreSQL?

1453

Why Update is too slow

1448

What does the option psql -l of PostgreSQL display?

1512

What is the operator that is used for case-insensitive regular expression searches in PostgreSQL?

1310

What is the option that can be used in PostgreSQL to find out how the query optimizer is evaluating the query given?

1369

What is the option used in PostgreSQL to increase the number of shared memory buffers shared among the backend processes

1375

What is the powerful database utility that can be used for building, executing and processing queries upon PostgreSQL databases?

1657

Does PostgrSQL support Column constraints? If so how is it done?

1325

Explain what is PostgreSQL?

1 2124

State some of the advanced features of PostgreSQL?

1 2367

Explain about Write Ahead logging?

1 2464

Explain about Multi version concurrency control?

1 2287

How to start the database server?

1 2110

How to stop the database server?

1 2226

Un-Answered Questions { Databases }

how Data is stored in a file so that Direct Searching can be performed

1059

Differentiate between ms sql server reporting services vs crystal reports?

947

How do I view a procedure in sql server?

1038

What is unique key in mysql?

1052

How can I create a database in mysql?

914

How do I create a database in pgadmin 4?

845

How to get the query of a table in sql server?

965

how to load the data with one flat file and one rdbms table using joins?

670

Is hive a database?

990

In Oracle Clinical 4.5.0, can the VIEW_TEMPLATE_ID column in DATA_EXTRACT_VIEWS table contain NULL value?

2393

what is meant by urlencode and urldocode? : Sql dba

1246

What do we use to remove duplicate records while fetching a data in mysql ?

1023

What is data profiling in sql?

1141

What is normalization? Explain different forms of normalization?

1235

Is mongodb good for big data?

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