SQL software and query optimization tools

Introduction : 
SQL stands for Structured Query Language. SQL is a non-procedural language, so the Optimizer is free to merge, reorganize and process in any order. It is based on statistics collected about accessed data. It is very useful to perform query and to store and manage data in RDBMS. SQL is a language to operate databases. It includes database creation, deletion, modifying rows etc. SQL follows an ANSI (American national standards institute) standard. There are different versions of SQL language. SQL commands are instruction. It is used to communicate with the database and perform specific task, of function queries of data.

SQL commands :
There are mainly three types of SQL commands used for storing and managing database.

1. DDL(Data Definition language) - 
   In DDL, you can perform the following operation like creating tables, deleting a table, and altering a table etc. All command are auto committed and permanently save all the changes in the databases.   
    
2. DML(Data Manipulation language) -
   In DML, you can perform the following operations like update to modify database. It is responsible for all the form of changes in the database and cannot permanently save all the changes in the database. 
    
3. DCL(Data Control language) -
   It used to grant and take back from any database user.

Example :
Let's consider an example where first you will see how you can create database and how you can optimize the query. Let's have a look.

Creating table- STATION -

CREATE TABLE STATION 
(
ID INTEGER PRIMARY KEY, 
NAME VARCHAR (20) NOT NULL,
AGE INT NOT NULL,CITY CHAR (20), 
STATE CHAR(2)                          
);

Inserting data into STATION table -

INSERT INTO STATION VALUES ( ASHA, 34, NAGPUR, MH);
INSERT INTO STATION VALUES ( ANEESHA, 32, INDORE, MP);
INSERT INTO STATION VALUES ( VIDHYA, 54, PUNE, MH);

Features :
There are following features of SQL software and query optimization tools as follows.

• SQL tuning -
  It rewrites SQL statements to improve the performance of the server and still get the same SQL results.
   
• Supported database environments - 
  It is usually supported are My SQL, Microsoft, Oracle etc.
   
• Databases in the cloud -
  It is generally used to analyzing and optimizing database for cloud database like Microsoft SQL Azure.

Important tools of SQL software and query optimization :

1. Solar wind's database performance analyzer - 
   Performance monitoring for relational databases such as Assure SQL, My SQL, ASE, IBM DB2 database.
    
2. App Optics APM - 
   It is based on cloud, and it is one of the performance monitor application that has feature of database tuning utilities.   
    
3. Paessler PRTG network monitor -  
   A network, server and application monitor that includes monitors for SQL server, Oracle SQL.
    
4. Sentry one SQL sentry - 
   It is one of the monitoring tool and also includes alerts for showing threshold for SQL server.
    
5. EverSQL - 
   It is one of the SQL tuner that is generally used for rewriting query automatically to improve the performance of SQL server database.
    
6. Idera DB optimizer -
   It is a tool that is used for optimizing a query for SQL server, Oracle, and Sybase. Spot in efficiencies in database queries and produces recommended fixes.
    
7. dbforge studio - 
   It is an editor for SQL server that has features like range of utilities, query building, and an auto complete system for developers typing in query and code.

Applications :
SQL software and query optimization tools is very helpful and the applications are as follows.

• Writing Instant Queries and getting an output.
• Writing and executing script.
• Optimizing query and increase the performance of an application.
• Retrieve information from database on the basis of query.
• Optimization tools are very helpful in production uses as it also these tools are cost and time saving.

Conclusion :
SQL is a query language to operate databases. It is the way to store and manage database with the help of queries.You can also perform operations as per requirement like finding best score of a player from cricket team player database. It improves the performance of server, by finding alternative way to process those SQL queries and optimally reduce the time. SQL is a popular because it offers the following advantages like describing the data. Creating and drop databases and tables. In SQL, Most commonly used commands are like CREATE for creating database, SELECT for reading database, INSERT for writing data into the database, UPDATE for modification in existing database, DELETE for deleting data from database, and DROP for deleting data and schema completely from RDBMS.