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MySQL Database Questions

Let’s look at some MySQL Questions and Answers on this page.

What are the benefits of MySQL?

Answer:
MySQL is the most popular open-source and powerful RDBMS. Some of the benefits of MySQL are as follows:

  • MySQL is cross-platform and runs on many supported operating systems.
  • MySQL supports both open-source and commercial licenses. MySQL Community Edition is open-source software.
  • MySQL is built for high performance and supports large databases.
  • MySQL is reliable and supports a secure authorization system.

Q)

Parentheses are optional when calling a MySQL Function. True or False ?

Answer:

False

MySQL Function Parentheses Error

Question)

What is the use of CHAR_LENGTH function?

Ans:

The CHAR_LENGTH function returns the number of characters in a specified string.

Question)

Trigonometric functions are supported in MySQL. True or False?

Ans:

True

Question)

List the three most commonly used Storage Engines in MySQL?

Answer:

MySQL works with many Storage engines.  The most commonly used storage engines are as follows:

  1. InnoDB
  2. MyISAM
  3. MEMORY

Question)

List two statements that can be used to display information on views in the database?

Answer:

  • SHOW CREATE VIEW <view_name>
  • SHOW FULL TABLES

Question)

What is mysqldump?

Answer:

The mysqldump program dumps table contents in text format. Its output is usually redirected to a file. The mysqldump utility can export tables in many ways:

  • Dump full structure, including DROP TABLE and CREATE TABLE statements to re-create the complete table.
  • Dump only table data
  • Dump only table structure
  • Dump in a standard format, etc

Question)

What is mysqlimport?

Answer:

The mysqlimport is a client program that loads data files into tables. It uses the LOAD DATA INFILE statement. The program examines the options, connects to the MySQL server and for each input file named in the statement, issues a LOAD DATA statement that loads the data into the appropriate table.

Question)

How to export a table in CSV format?

Answer:
We can create a text file that contains information in comma-separated values (CSV) format,
with values quoted by double quote characters and lines terminated by carriage returns.
To export information in this format, use this SELECT……INTO OUTFILE statement:

Sample command to export a table data in CSV format:

SELECT * INTO OUTFILE ‘countrycsvexport.txt’
FIELDS TERMINATED BY ‘,’
ENCLOSED BY ‘”‘
LINES TERMINATED BY ‘\r’
FROM Country ;

CSV Format, each row is terminated by a carriage return character and the column values are enclosed in double quotes, and separated by a comma.

MySQL Export CSV Format

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MySQL Tutorials

MySQL Tutorials on this website:

https://www.testingdocs.com/mysql-tutorials-for-beginners/

For more information on MySQL Database:

https://www.mysql.com/