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Learn – MySQL Commonly usefull Queries

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Learn – MySQL Commonly usefull Queries

A list of commonly used MySQL queries to create database, use database, create table, insert record, update record, delete record, select record, truncate table and drop table are given below.

1) MySQL Create Database
MySQL create database is used to create database. For example

create database db1;

2) MySQL Select/Use DatabaseMySQL use database is used to select database. For example

use db1;

3) MySQL Create QueryMySQL create query is used to create a table, view, procedure and function. For example:

CREATE TABLE customers
(id int(10),
name varchar(50),
city varchar(50),
PRIMARY KEY (id )
);

4) MySQL Alter QueryMySQL alter query is used to add, modify, delete or drop colums of a table. Let’s see a query to add column in customers table:

ALTER TABLE customers
ADD age varchar(50);

5) MySQL Insert QueryMySQL insert query is used to insert records into table. For example:


insert into customers values(101,'rahul','delhi');

6) MySQL Update QueryMySQL update query is used to update records of a table. For example:

update customers set name='bob', city='london' where id=1;

7) MySQL Delete QueryMySQL update query is used to delete records of a table from database. For example:

delete from customers where id=1;

8) MySQL Select QueryOracle select query is used to fetch records from database. For example:

SELECT * from customers;

9) MySQL Truncate Table QueryMySQL update query is used to truncate or remove records of a table. It doesn’t remove structure. For example:

truncate table customers;

10) MySQL Drop QueryMySQL drop query is used to drop a table, view or database. It removes structure and data of a table if you drop table. For example:

drop table customers;