[NEW] Basic To Advanced MySQL Commands | mysql – Pickpeup

mysql: คุณกำลังดูกระทู้

MySQL Commands


Introduction To MySQL Commands

MySQL is an open-source widely used relational database management system that helps to deliver applications with high performance, and scalable web-based and embedded database applications to the customers. It is widely used as a database component of the software stack for a web application. MySQL Commands are very powerful and we will have a look into MySQL commands which are very helpful and consequential for every developer to know and use these queries to interact with the system and MySQL database. It is based on a structured query language (SQL) and it will support and run on Linux, UNIX, and Windows.

Basic MySQL Commands

1. Write a query to create a table country with column names country name, country id, and region id?

Create a table country in MySQL is done by using the below query and the output is as following:

See also  [Update] 악이 승리한 세계에서, RPG 명가 옵시디언 신작 ‘티러니’ | 옵시디언 엔터테인먼트 - Pickpeup

Start Your Free Data Science Course

Hadoop, Data Science, Statistics & others


CREATE TABLE countries(
countryname varchar(60),
countryid varchar(4),
regionid decimal(10,0));



2. How to get a list of all databases present?

We can get a list of all running databases in MySQL using the below query


Show databases;


database present

3. How to get all tables in a database using MySQL?

We can get all the tables present in a database in MySQL using the below query:


Show tables;


database using MySQL

4. How to know all the filed names and types of tables in MySQL?

We can get all the filed names and type of a table in MySQL Command using the below query

describe os_users;

Here os_users is a table with filed names u_id and password and the output is as below:


table in MySQL

5. How to delete a table and a database in MySQL?

We can delete a table using the below MySql Command query

Query to delete a table:

Drop table lookup;

Where lookup is a table name. We can delete a database using the below query

Query to delete a database:

Drop database users;

Where a user is a database

Output for delete tables is:

database in MySQL

6. How to get data from a table where a particular field is filled with data “MyIsam”. We need to get the creation time and engine field for where the engine field is filled with “MyIsam”.

We can write a MySQL Command query for the above requirement as below: Let us say we have a table XYZ with fields creation_time and engine and the engine filed is filled with string data and the creation_time field is filled with date and time.


Select create_time, engine from xyz where engine=”MyIsam”;

The above query will give creation_time and engine where engine field is filled with “MyIsam”



7. Query to get all fields from a table where a name is ‘tecmint’ and web address is ‘tecmint.com’?

Let us consider a table as XYZ with field’s id, name, and web address.

We will get the fields of a table where the name matched as “tecmint” and web address is matched as “tecmint.com”


Select * from xyz where name=”tecmint” and webaddress=”tecmint.com”;

The above query will display all the fields where the field name is matched with tecmint and web address is matched with tecmint.com



8. How to know the total number of rows in a table?

We can the number of rows in a table using the query as below:


Select count(*) from Tables;



9. How to select particular filed rows in a table?

We can select a particular filed let us say uid from a table called os_users is


Select uid from table os_users;



10. How to use a particular database in MySQL?

We can switch to use a particular database using the below query


Use a database cloud;


See also  [Update] Stonk-O-Tracker | gme - Pickpeup

database cloud

Intermediate MySQL Commands

There are several other popular MySQL commands that the PHP developer also uses, which are not very basic but work with MySQL more. Some of the following types of intermediate MySQL commands:

11. Query to get a specific field from a table where a constraint is matched( emp_id=100)?


Select emp_id, emp_name from table employee where emp_id=100;

12. Query to order the results from a table based on certain constraint and using ‘order by’?

Query using with orderby for sorting the results from a table is


Select emp_id, emp_name from employee where city="Hyderabad" order by emp_id;

13. Query to sort the results from a table based on some constraint and using “Group by”?

Query using “Group By” to sort the results from a table is as below:


Select name, age from patients where age > 45 group by age order by name;

14. Query to get the total number of customers from a customer’s table?

Query to get all the customers from a customer table is:


Select count(customer_id), country from customers group by country;

15. Query to calculate the total sum of the salary given to each employee in a company?


Select sum(salary) from employee where emp_age > 30;

16. Query to list all the views available in the schema?


Select * from myschema.views;

17. How to create a view from a table?

Query to create a view is as below:


Create view A_students as select student_name, student_id from student where GPA > 80;

18. How to update a view?

Query to update the existing view is as below:


Create or replace view product_list As select product_id, Product name, category from products where discount=no;

19. Query to display primary keys from a table?

The following displays all the fields in a table’s primary key:


Select * from Sys. objects where type=’PK’;

20. Query to display all the user tables in a system?


Select * from Sys. objects where type=’u’;

Advanced MySQL commands

21. Why IFNULL() statement is used in MySQL?

The IFNULL() statement will check its first argument and return if it is not a null or second argument.


Select name, IFNULL(id,’unknown’) As ‘id’ from the taxpayer;

22. Query to show only five rows from the result of a query in MySQL?

In order to achieve this we need to use LIMIT in the query as below:


Select * from students limit 5

23. Query to select all users except one user using the not operator?

Query using not operator is:


Select * from users where user_name !=SAM;

24. Query to get the present date in MySQL?

The following query will give the current date


Select current_date();

25. How to export all tables to an XML file in MySQL?

We need to use –e option to export all the tables to an XML file as below query:


Mysql –u user_name -xml -e ‘select * from table_name’ > tables.xml

Tips and Tricks to use MySQL Commands

Some common users who frequently use MySQL commands normally use some tips and tricks to correctly use MySQL commands output. These types of tricks usually solve some user-specific queries and display the execution output to understand it correctly. Some of the key tricks most commonly used are:

  • Add Explain statement before the select queries as it gives a better explanation about what query is exactly doing.
  • Need to enable query cache as it improves the performance of the execution of queries and it is one of the best methods for database performance.
  • Use stack_trace in MySQL which will help you to differentiate between bugs, track, and fix them.
  • We can take the database backup using a mysqldump command in MySQL which will help you to keep track and backup.
See also  [NEW] 【画像】指原莉乃の顔の変化が凄すぎ!すっぴん公開で整形疑惑を払拭! | sasihara - Pickpeup


It’s an overview of MySQL commands of different levels and tips and tricks to use them. I hope you will have a good understanding and knowledge about the MySQL commands and how to use them after reading this article.

Recommended Articles

This was a guide to MySQL commands. We discussed basic commands and some MySQL advance commands here. You can also look at the article below for more information:

  1.  Selenium commands
  2. You Should Try Pig Commands
  3. TopMost Sqoop Commands
  4. Tableau Commands




MySQL: Introduction

Want more? Explore the library at https://www.codecourse.com/lessons
Official site

นอกจากการดูบทความนี้แล้ว คุณยังสามารถดูข้อมูลที่เป็นประโยชน์อื่นๆ อีกมากมายที่เราให้ไว้ที่นี่: ดูความรู้เพิ่มเติมที่นี่

MySQL: Introduction

MySQL Installation \u0026 Workbench Tutorial in Hindi / Urdu

In this tutorial you will learn mysql installation tutorial in Hindi, Urdu.You can learn how to install mysql on windows system and how to install mysql community server and mysql workbench in hindi.
PHP Tutorial in Hindi Playlist
MySQL Tutorial in Hindi / Urdu Playlist
Official Website
Follow us on Facebook
Follow us on Twitter
mysql webdevelopment php

MySQL Installation \u0026 Workbench Tutorial in Hindi / Urdu

SQL-01: Giới thiệu loạt bài SQL căn bản và nâng cao

Các bạn đã có thể học trên trang của mình: https://braniumacademy.net/
Trong phần này mình sẽ giới thiệu những nội dung chính sẽ bao gồm trong danh sách phát của CSDL cơ bản. Loạt bài sẽ trang bị cho các bạn những kiến thức cơ bản về SQL, cách sử dụng một số công cụ quản trị CSDL phổ biến như SQL Server, MySQL. Loạt bài cũng sẽ đề cập và hướng dẫn thiết kế CSDL từ các thông tin có được. Cuối cùng sẽ là các bài test để cho các bạn vận dụng kiến thức trong quá trình học. Bạn đang gặp vấn đề về CSDL? Bạn tìm đúng chỗ để đặt niềm tin rồi đấy. Sẵn sàng chưa Let’s go!
Khóa học hiện đã có bản web: https://www.braniumacademy.com/courses/khoahocsqlcoban/

SQL-01: Giới thiệu loạt bài SQL căn bản và nâng cao



DATABASE2 MySQL – 1.수업소개

모든 수업과 소스코드는 아래 주소에 있습니다.
DATABASE1 수업은 아래주소에 있습니다.

DATABASE2 MySQL - 1.수업소개

นอกจากการดูบทความนี้แล้ว คุณยังสามารถดูข้อมูลที่เป็นประโยชน์อื่นๆ อีกมากมายที่เราให้ไว้ที่นี่: ดูวิธีอื่นๆMusic of Turkey

ขอบคุณมากสำหรับการดูหัวข้อโพสต์ mysql

2 thoughts on “[NEW] Basic To Advanced MySQL Commands | mysql – Pickpeup”

  1. 6275 585280 Spot on with this write-up, I truly feel this website needs a lot a lot more consideration. Ill probably be once again to read a lot more, thanks for that info. 859941


Leave a Comment