SQL Applications: A Concise Tutorial Just An Hour | ACTE
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SQL Applications: A Concise Tutorial Just An Hour – FREE

Last updated on 10th Jul 2020, Blog, Tutorials

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Vikas Aswal (Senior Sql Database Administrator )

Vikas Aswal is a Senior SQL Database Administrator and has more than six years of experience in SQL Databases and also an expert in DataStage, Hadoop, Microsoft Power BI, MicroStrategy, OBIEE, and Cognos.

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SQL is a database language, used to update databases, execute queries, and manage permissions. It was designed for relational database management systems. It’s generally considered a declarative language. It’s been around in some form since the 70s and is just about as ubiquitous as data management itself.

The model was first introduced in a paper titled “A Relational Model of Data for Large Shared Data Banks” written by E. F. Codd. The language was at one point titled SEQUEL for Structured English Query Language; you may occasionally still hear SQL pronounced that way.

SQL-related products have been in commercial use since 1979, when they were introduced by a forerunner to Oracle. Does Oracle control SQL? No. IBM soon followed suit. Today SQL is used in many open source and commercial products. Often these include SQL in the name. PostgreSQL is among the best known.

There are two standards committees “guarding” SQL: the International Standards Organization and the American National Standards Institute. Still, SQL is not all the same. In order to access and use the data, you need a database program or server. The major vendors have their own servers for database applications. Oracle Database applications use the Oracle Database SQL. IBM’s server is DB2. There’s also the Microsoft SQL Server. Then there’s MySQL , an open source database program that is sometimes thought of as a light version of Microsoft SQL – a place to get started, but one your business may ultimately outgrow.

While multiple database programs use the SQL standard, they may eliminate portions or add to it. PL/SQL, for example, is oracle’s extension. Alterations make for some compatibility issues – this is an area of continued focus.

Uses of SQL

SQL is used in health care (cancer registries) business (inventories, trends analysis), and education. It even has applications in the defense industry.

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    Who works with SQL? Database developers and administrators and business analysts are among the better known users. But knowing at least a little SQL can be an asset for people in a lot of different roles, from the web developer to the PhD level scientist. The most basic task is the query — you specify “from” to tell the program what table(s) to retrieve data from and give additional clauses like “where” and “having” to narrow down what you want. A more advanced user will design and modify databases.

    SQL Certifications

    There are multiple SQL-related certifications that you can pursue. Certifications are usually vendor-specific — you’re getting certified in your expertise with particular solutions.

    Microsoft recommends Certified Solutions Expert: Data Platform for those who build enterprise scale applications. SQL MCSE: Business Intelligence is for those who develop business solutions and Microsoft Certified Master: SQL 2008 for senior IT professionals who use SQL Server 2008.

    IBM, meanwhile, offers the Certified Solutions Developer credential.

    Then there’s Oracle. Oracle offers many SQL-related certifications for database administrators and developers. 10g and 11g administrators can be certified at the associate, professional, and master level. Some certifications require you to take particular courses.

    As a database professional, you can also be certified in MySQL.

    Be aware, though, that certifications change just about as frequently as technologies do.

    Features of SQL

    Here in this section of the SQL tutorial for beginners, we list some of the top features of SQL that make it so ubiquitous when it comes to managing relational databases.

    • SQL is very simple and easy to learn language
    • SQL is versatile as it works with database systems from Oracle, IBM, Microsoft, etc.
    • SQL is an ANSI and ISO standard language for database creation and manipulation
    • SQL has a well-defined structure as it uses long established standards
    • SQL is very fast in retrieving large amounts of data very efficiently
    • SQL lets you manage databases without knowing lot of coding.

    Applications of SQL

    Here in this section of the SQL tutorial we will learn SQL applications that make it so important in a data-driven world where managing huge databases is the norm of the day.

    • SQL is used as a Data Definition Language (DDL) meaning you can independently create a database, define its structure, use it and then discard it when you are done with it
    • SQL is also used as a Data Manipulation Language (DML) which means you can use it for maintaining an already existing database. SQL is a powerful language for entering data, modifying data and extracting data with regard to a database
    • SQL is also deployed as a Data Control Language (DCL) which specifies how you can protect your database against corruption and misuse.
    • SQL is extensively used as a Client/Server language to connect the front-end with the back-end thus supporting the client/server architecture
    • SQL can also be used in the three-tier architecture of a client, an application server and a database which defines the Internet architecture.

    Why should you learn SQL?

    Today regardless of the relational databases systems by major corporations like Oracle, IBM, Microsoft and others, the one thing that is common to them is the Structured Query Language or SQL.

    So if you learn SQL online then you will be able to pursue a very broad career spanning a lot of roles of responsibilities. Also if you are learning SQL then it is important for a data science career as well since a data scientist will also have to deal with relational databases and query it using the standard language SQL.

    SQL Server Installation Step By Step Process

    Here we will see how to install SQL in our system for that follow below steps. Here we are installing SQL in windows 8.1 OS. 

    Now go to your SQL Server installation files folder and double click on the setup file like as shown below.

    open sql server installation setup file in folder

    Whenever you click on the setup file, it will show the compatibility assistance window just ignore that message and click Run the program without getting help like as shown below.

    select option to run program without getting help to install sql server

    To setup SQL Server 2008 R2 it requires Microsoft .Net Framework and an updated windows installer that’s the reason it will show an alert window in that click OK to install required things like as shown below.

    Need Microsoft .Net Components to install sql server

    Once that is installed it will show the popup for Windows Update Standalone Installer, click OK button to install Windows Installer like as shown below.

    Installing required .net components from windows installer

    Once we finish installation it will ask you to restart the system. Once we restarted now double click on setup button to install SQL Server it will open installation screen like as shown below in that select installation à under that select New installation or add features to an existing application like as shown below.

    Select new installation or add features to an existing application to install sql server

    Once click on “New installation or add features to an existing application” it will open another window like as shown below.

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    Setup rules checking result to install sql server

    Here it will run Setup Support Rules like as shown above once done click OK. Now it will open another window to Setup Support Rules in this window click install button like as shown below.

    Check Setup Support Files to Install SQL Server

    Once Setup Support Rules installation finished it will show tested result like as shown below in this if everything fine then click the install button.

    After completion of setup rules checking in sql server installation

    In the next screen, it will ask for the product key if you enter your key and click Next button like as shown below.

    After completion of setup rules checking in sql server installation

    Now accept the terms and conditions and click the Next button.

    Accept terms and conditions to install sql server

    Now select SQL Server Feature Installation like as shown below and click the Next button.

    Select SQL Server Feature Installation

    Now click on Select All button to select all features to install and then click Next button like as shown below.

    Select all features to install sql server

    It will do the required tests once everything finished, click the Next button like as shown below.

    Select all features to install sql server

    Now select Default Instance and click Next button like as shown below.

    Select default instance to install sql server

    Now it will show required disk space to install all SQL Server features in that click Next like as shown below.

    Checking disk space requirement to install sql server

    In the server configuration screen, you need to configure your accounts like as shown below and click Next button.

    Server configuration for user accounts to install sql server

    Now in database engine configuration window select Mixed mode authentication (It will allow you to login with windows and SQL authentication) then specify password for your account and also add SQL Server administrator account for that click on Add Current User button to add current user as administrator or click on Add button to add new user and click next like as shown below.

    Database Configuration Settings to Install SQL Server

    In Analysis services configuration window specify administrator by Click on Add Current User button or Add button to add a new user as administrator like as shown below.

    Add current user to install sql server analysis services

    In reporting services configuration window select Install the native mode default configuration and click Next button like as shown below.

    select install the native mode default option to install sql server

    Now in Error Reporting window click Next button like as shown below.

    allow error reporting to install sql server in system

    In the installation configuration rules window, it will do some tests once everything is done click Next button like as shown below.

    Installation Configuration Rules test Results to Install SQL Server

    Now we are ready to install SQL Server so click on the install button like as shown below.

    Ready to Install SQL Server in System

    In the installation progress window, it will show installation progress once done click next button like as shown below.

    SQL Server Installation in Progress Status

    Once everything installed correctly it will show a message like as shown below.

    After successful installation of sql server we will get message lik SQL Server Installation Completed Successfully

    Now go to the start button of windows and open SQL Server Management Studio 2008 R2 like as shown below.

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    Open sql server management studio in system by searching in system

    Now enter the server name and click Connect button like as shown below.

    Enter server name to connect sql server database

    Now our SQL Server Management studio like as shown below.

    After connecting server in sql server management studio

    Uses of SQL

    SQL is used in health care (cancer registries) business (inventories, trends analysis), and education. It even has applications in the defense industry.

    Who works with SQL? Database developers and administrators and business analysts are among the better known users. But knowing at least a little SQL can be an asset for people in a lot of different roles, from the web developer to the PhD level scientist. The most basic task is the query — you specify “from” to tell the program what table(s) to retrieve data from and give additional clauses like “where” and “having” to narrow down what you want. A more advanced user will design and modify databases.

    SQL Certifications

    There are multiple SQL-related certifications that you can pursue. Certifications are usually vendor-specific — you’re getting certified in your expertise with particular solutions.

    Microsoft recommends Certified Solutions Expert: Data Platform for those who build enterprise scale applications. SQL MCSE: Business Intelligence is for those who develop business solutions and Microsoft Certified Master: SQL 2008 for senior IT professionals who use SQL Server 2008.

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    IBM, meanwhile, offers the Certified Solutions Developer credential.

    Then there’s Oracle. Oracle offers many SQL-related certifications for database administrators and developers. 10g and 11g administrators can be certified at the associate, professional, and master level. Some certifications require you to take particular courses.

    As a database professional, you can also be certified in MySQL.

    Be aware, though, that certifications change just about as frequently as technologies do.

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