sql example(1) 

   
   

Output:

PersonID
112
132
124
Address
-43
-10
-21
COUNT(DISTINCT Address)
3
PersonID	LastName	FirstName	Address	City
132	nag	praha	-10	guntur
PersonID	LastName	FirstName	Address	City
124	yagna	trr	-21	ongole
PersonID	LastName	FirstName	Address	City
132	nag	praha	-10	guntur
124	yagna	trr	-21	ongole
PersonID	LastName	FirstName	Address	City
112	amar	bhogyam	-43	andhra
124	yagna	trr	-21	ongole
PersonID	LastName	FirstName	Address	City
132	nag	praha	-10	guntur
124	yagna	trr	-21	ongole
PersonID	LastName	FirstName	Address	City
112	amar	bhogyam	-43	andhra
PersonID	LastName	FirstName	Address	City
112	amar	bhogyam	-43	andhra
PersonID	LastName	FirstName	Address	City
132	nag	praha	-10	guntur
124	yagna	trr	-21	ongole
PersonID	LastName	FirstName	Address	City
132	nag	praha	-10	guntur
124	yagna	trr	-21	ongole

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About MySQL

MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation.

Key Features:

  • Open-source relational database management systems.
  • Reliable, very fast and easy to use database server.
  • Works on client-server model.
  • Highly Secure and Scalable
  • High Performance
  • High productivity as it uses stored procedures, triggers, views to write a highly productive code.
  • Supports large databases efficiently.
  • Supports many operating systems like Linux*,CentOS*, Solaris*,Ubuntu*,Windows*, MacOS*,FreeBSD* and others.

Syntax help

Commands

1. CREATE


Example


2. ALTER


Example


3. TRUNCATE


4. DROP


5. RENAME


6. COMMENT

Single-Line Comments:


Multi-Line comments:


DML Commands

1. INSERT


Note: Column names are optional.

Example


2. SELECT


Example


3. UPDATE


Example


4. DELETE


Example


Indexes

1. CREATE INDEX


  • To Create Unique index:

2. DROP INDEX


Views

1. Create a View


2. How to call view


3. Altering a View


4. Deleting a View


Triggers

1. Create a Trigger


2. Drop a Trigger


Stored Procedures

1. Create a Stored Procedure


2. How to call Stored procedure


3. How to delete stored procedure


Joins

1. INNER JOIN


2. LEFT JOIN


3. RIGHT JOIN


4. CROSS JOIN



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