Course Code: sql
In the first lesson, you'll explore the basic structure and history of relational databases. You'll learn the history of SQL and then review some key terms. Then, you'll discover what SQL is and how it's used with a relational database.
In this lesson, you'll learn how to use SQL to filter and retrieve data from tables. The lesson will talk about important query terms that allow you to communicate with your database, as well as syntax rules that will help you to create clear and understandable queries while avoiding system generated errors.
In this lesson, you'll learn how to use SQL to filter retrieved data. You'll practice sorting retrieved data using the ORDER BY clause. You'll be able to sort single and multiple columns, and you'll know how to specify sort directions such as ascending and descending order. You'll also learn additional query terms that will help you customize your SQL queries.
In this lesson, you'll learn how to reformat retrieved data with calculated fields and functions. You'll also learn how to create alternate names for columns, and you'll discover the secret behind merging columns with the concatenation symbol.
This lesson will show you how to gather significant statistics from data using aggregate functions. You'll also learn how to use the GROUP BY clause in conjunction with an aggregate function to gather important statistics from a table. Then you'll find out how to use the HAVING clause in conjunction with an aggregate function to filter groups of data from a table.
This lesson is all about subqueries. You'll learn how to extract data from multiple tables simultaneously, how to use calculated fields in subqueries, how to use the DATEPART () function in subqueries, and how to use aggregate functions in subqueries. The lesson will then talk about qualification—a technique used to combine a table name with a column name so that there's no question about which table the column name refers to.
In this lesson, you'll learn how to use joins to gather information from two or more tables simultaneously. You'll learn how to use the inner join, self-join, natural join, and the outer join. Then you'll become familiar with the term Cartesian product.
In this lesson, you'll discover how to manipulate data using the INSERT, UPDATE, and DELETE statements. You'll learn how to insert partial and complete rows into a table, and how to update information already stored in a table. You find out how to transfer data to a new table, how to transfer data to an existing table, and how to delete rows from a table.
In this lesson you'll find out how you can use SQL to create and maintain tables. You'll learn how to use the CREATE TABLE keywords to create a table and how to use the ALTER TABLE, DROP TABLE, ADD COLUMN, and DROP COLUMN keywords to manipulate the tables themselves. You'll also find out how to define a primary key, data type, and field size.
In this lesson, you'll learn how and why views are used in SQL. You'll learn how to create and use views to simplify complex queries, summarize data, and manipulate data stored in tables. The lesson will also teach you how to update and delete a view.
In this lesson, you'll learn how transaction processing, constraints, and indexes are implemented in SQL. You'll work through an example that demonstrates how a transaction is created, how constraints are used in the creation of a table, and how indexes are used to improve the performance of a database by optimizing the speed at which queries are processed.
In the final lesson, you'll find out how stored procedures, triggers, and cursors are implemented in SQL. You'll see how stored procedures are created and executed, as well as how triggers work. You'll also see how cursors are declared in SQL.
Dr. Cecelia Allison is an experienced software tester and technical specialist with more than 15 years of hands-on experience using and teaching SQL. She is also a technical writer, a published author, and a university professor. She holds a Bachelor of Science in finance, a Master of Science in information systems and a Doctor of Business Administration in management information systems.
There are no prerequisites to take this course.
The instructional materials required for this course are included in enrollment and will be available online.
Instructor-Led: A new session of each course begins each month. Please refer to the session start dates for scheduling.
Self-Paced: You can start this course at any time your schedule permits.
Instructor-Led: Once a session starts, two lessons will be released each week, for the 6 week duration of your course. You will have access to all previously released lessons until the course ends.
Self-Paced: You have three-month access to the course. After enrolling, you can learn and complete the course at your own pace, within the allotted access period.
Instructor-Led: The interactive discussion area for each lesson automatically closes 2 weeks after each lesson is released, so you’re encouraged to complete each lesson within two weeks of its release.
Self-Paced: There is no time limit to complete each lesson, other than completing all lessons before your three-month access.
Instructor-Led: The Final Exam will be released on the same day as the last lesson. Once the Final Exam has been released, you will have 2 weeks plus 10 days to complete the Final and finish any remaining lessons in your course. No further extensions can be provided beyond these 10 days.
Self-Paced: Because this course is self-paced, no extensions will be granted after the start of your enrollment.
SQL stands for Structured Query Language. It is the primary language that’s used for interacting with and managing data held in relational database management systems and knowing it is a valuable skill. Its syntax is similar to English so it is said to be an easy programming language to learn. Using SQL, you can easily query, update and organize data as well as create and modify database structure. You can also control access of the data by other individuals. While it may sound like something you can handle in Microsoft Excel, it is much more capable of handling large amounts of data. In fact, it’s designed to easily handle billions of cells of data.
There are several reasons to learn SQL including you will be able to answer questions about your business without having to rely on others to retrieve and distribute data. You can earn a high salary by learning SQL, and it is one of the skills employers are seeking most in our data-driven economy. You also won’t ever have to try to remember how you created a report again as you can save and re-use past SQL queries.
SQL is considered a foundational programming skill. According to some, every software developer or programmer should know how to write SQL queries in order to retrieve data from a database. We live in a data-driven world and understanding how to access and analyze data is a skill that organizations need. Knowledge of SQL could be the first step in learning other programming languages as well.
SQL is one of the most sought-after skills in business as it allows users to interact with data using relational logic. In fact, according to a popular tech website, there are almost 20,000 jobs that require SQL knowledge posted every month! It allows users to access and report on mass amounts of data as well as save the queries that produce reports for quick, easy access in the future, so it’s an important skill to bring to your organization no matter what industry you are in.
According to a popular tech website, there are almost 20,000 jobs that require SQL knowledge posted every month! There are literally dozens of professions the require knowledge of Microsoft SQL. Some of these include:
Yes, professionals who understand how to write SQL are in high demand. There are tens of thousands of open positions across the country and around the world that require knowledge of SQL, and it is considered a foundational programming skill.
Businesses in almost every industry use SQL including education, government, finance, technology, manufacturing, retail, and others. It is used for a variety of business tasks including tracking product and sales data, storing financial data, calculating ROI, storing customer data, and more. It is used primarily in large organizations, but is also showing up in small to medium sized businesses as well.
Yes. SQL is considered a fourth-generation programming language (4GL) meaning that it is closer to human language than some of the other programming languages like Java. While it isn’t as difficult to learn as C# or Java, it is definitely considered a programming language and one that many programmers learned as their first programming language.
SQL consists of three main components including: Data Definition Language (DDL), Data Manipulation Language (DML), and Data Control Language (DCL). DDL is used to create and modify tables and other objects. DML is used to manipulate data within a table. And DCL is the component that creates privileges to allow others to access and manipulate the database.
SQL can perform four basic operations to allow you to interact with data. These operations include create, read, update and delete—also known as CRUD operations.
SQL Server is a relational database management system developed by the Microsoft Corporation. It was designed primarily to compete against MySQL. It is sometimes referred to as MSSQL or Microsoft SQL Server.
MySQL, developed by Oracle, is the most popular program used for the management of SQL databases. It is an open-source relational database management system which has millions of applications built using it.
Cecelia did a fine job in presenting the material and backing it up with examples. The assignments and questions on the quizzes were also appropriate. Enjoyed it!"
I really wanted to thank Ms. Allison for conducting this course. I have tried to take an SQL course before but had to quit as the instructor taught so far above my head I could not understand the subject matter. This course was broken down into small bites and the quizzes and assignments helped to bring the concept home! I have enjoyed this course and would consider taking another course like this. I have already recommended this course to a friend who has also taken it. We both are very happy with the results. Thanks Again."
It made me feel good to know that Cecelia Allison is an expert on this subject. I bought both of her books and I have learned a lot. Her style of teaching makes learning easy and fun. I feel very fortunate to have learned from such an expert in the field."
It was a great class! It not only gave me the knowledge of SQL, but it also improved my abilities in other applications such as MS Access and MS Excel. The instructor presented the subject matter in a perfect balance of technical and practical. It was evident to me she has educational and in-the-field expert experience. She is also personable and helpful."
The course gave me a 'challenging' introduction to SQL. It introduced two types of databases that I had not previously used:Microsoft Access and SQL Query 7. The examples and assignments reinforced what had been taught in previous lessons. Thank you. I not only learned a great deal but had a good time."
Very nice introduction to SQL. This helped me gain a better basic understanding of things I'd been tampering with for several years. I could probably have saved myself many frustrating hours having taken a course like this a couple years back."
I really enjoyed Cecelia's writing style, and would like to comment on her excellent use of English and attention to detail/proofreading. Too many programmers, including instructors, don't seem to care how their messages are written as long as someone, somewhere can decipher the meaning. When an instructor cares enough to write well, I respect his/her knowledge and authority on the subject. I feel that this is very important when learning, as it is the instructor's job to make material more efficient to absorb. Thanks, Cecelia!"
I was impressed with this class. After reading one of the discussion responses that I was actually doing intermediate to advanced work with SQL and understanding it, is a huge compliment to the instructor. I have never been on Access or done any work with any other databases before either. I have since gone onto my home computer and done a lot of work setting up databases with the help of this course. Thank you and I will definitely be taking more and taking the instructor’s advice on what to take in the future. Thank you again for a great class. After being unemployed for a year it is great to have something to make me feel good!"
When I started this course I really didn't know anything about SQL. This course has helped me a lot in learning the basics about SQL. I feel more comfortable using it at work now. Cecelia's book was also a great help and I recommend it to those who are just starting to learn this course. I'm so glad I found this course, and I look forward for the next intermediate class that Cecelia is going to offer."