Are you planning to quick start your career? Do you wish to have some kind of technical job, or willing to have a sitting job in IT field? Then start learning SQL because the benefits of learning SQL are amazing and highly considerable and you can have a lucrative job by learning SQL.
SQL stands for Structured Query Language. It is used to retrieve data from databases in an easy manner and without writing too much code.
Benefits of Learning SQL:
1 Easy to Use
2.No Coding Required
Now when you have read the amazing benefits of SQL, you are ready to quick start SQL. StrataScratch is here to help you learn SQL for free, find some amazing Tutorials and Practice Exercises.
This tutorial is designed to guide you from the scratch. Here's the first practice set for you.
1. Basic SQL Exercise:
This Section is aimed to provide you with the basics of SQL. The questions in this section are quite easy but are interesting enough to motivate you to learn at a high pace and solve problems quickly.In this Exercise use commands ‘SELECT, FROM, WHERE, GROUP BY, ORDER BY’.
To start this Exercise for free, you can click here (Freemium access)
2. Basic SQL Exercise 2:
This section is in continuation of the first exercise to make your grasp bit stronger by applying some more commands in a bit challenging way. In this exercise you are required to use commands like ‘SELECT, FROM, HERE, GROUP BY, ORDER BY, LIMIT, DISTINCT, OR AND, AS, DESC, ASC, IN, HAVING. You will get enough examples and explanations to use all the commands and functions in our exercises / tutorials.
3. Advanced SQL Exercises:
Now if you think that the previous exercises were too basic or were just entry-level questions for you, don’t worry, here is a bit challenging and a new set of SQL Exercise. This set is intended for users who have cleared first two basic exercises. There are 15 tables used in this exercise. You have to use commands like ‘AVG, DATE, MAX, JOIN and many other. This can help to improve your skills.
4. SQL and Business Insights:
Now when you have got your basics clear so is the time to move one step further and try exercises which are designed to challenge your analytical skills and solve actual business problems. This section provides you 6 different exercises. You can check this SQL Exercise right here.
5. Hotel Reviews Exercise:
This section is composed of questions related to Tourism and Business Management. In this Exercise, you have to use most of the commands which you have learnt in the basics and Advanced Sections but questions asked in this section are really challenging and tricky enough to use all your analytical skills.
Hope you enjoyed working on these Practice Exercises and learned all the basics and advanced SQL Queries. Stay connected with us for more Challenging Practice sheets. Don’t forget to give your valuable feedback and comments for further improvements.
If you’re reading this post, chances are you’re interested in learning SQL and Python. And why not? These two scripting languages are in huge demand, especially for data science, marketing analytics, and business operations.
So, if you are really interested to learn SQL and Python, don’t miss your chance to sign up for freemium plans offered at Strata Scratch. Strata Scratch is glad to announce the freemium plans. Let’s find out what guides and exercises these freemiums include.
SQL Tutorials & SQL Guide
Basic and Intermediate SQL Guide
If you are an absolute beginner, you shouldn’t miss this opportunity. This guide is designed to offer you a basic to intermediate knowledge of SQL.
Additionally, this guide will contain various SQL problem sets specifically tailored for students and novices.
Advanced SQL Guide
Don’t be sad If you are an advanced learner, as Strata Scratch brings you freemium access to advanced SQL guide. This SQL guide is meant to help you grasp the advanced SQL concepts. Our Advanced SQL Guide also includes SQL Data Types, SQL Date Format, Data Wrangling with SQL.
Basic SQL Exercises 1
At Strata Scratch, we not only allow you to read out tutorials but also let you practice SQL exercises. We are pleased to announce that our Basic SQL Excercise 1 is also free for all users.
So, if you want to increase your data analytical skills, don’t forget to sign up for this Basic SQL Exercise. The exercise will help you test how good you are at basic SQL coding. In this exercise, you will be asked to answer the questions.
Note: For other basic and advanced SQL exercises you will need to upgrade to our premium plans. Since premium exercises are also affordable, you can access our monthly prepaid plan as well.
Python Guides & Problem Sets
Similar to SQL, Strata Scratch also lets you walk through the python datasets free of cost. Our first Python Guide helps you learn connecting to a database and query datasets using Python.
Cleaning Data in Python
Most of the data scientists spend their 80% of the time in cleaning and manipulating data. This free Strata Scratch course will teach you how to clean data with Pandas and Data Cleanup Excercise with The Titanic Dataset.
However, for SQL problem sets such as NumPy Tutorial, DateTime, Creating Visualizations, etc. you will need to have premium access. The good news is, even in the Practice Problems section, you will get freemium access to short Pandas Tutorial for Data Analysis.
So, if you are in search of an affordable online platform to learn SQL and Python online, don't let this once a year opportunity from Strata Scratch pass you by. If you have a premium account with Strata Scratch, you may use another email account to access easy to learn freemium guides and exercises.
For those who don’t know, data science is multidisciplinary, having a blend of statistical (data) inference, algorithm development, and technology. Today, data science has been used to solve a wide range of analytically complex issues.
Numerous businesses and companies across the globe have adopted data science to leverage robust mathematical techniques and improve decision-making skills in the workplace.
The brands like Airbnb and Amazon are good examples that assimilated data science into their services and products. It’s worth mentioning that data science helped them get a competitive advantage. There has been so much achievement that now every industry and department leveraging data science to help make right decisions.
In fact, it would not be wrong to say that data science is going to be the best career of the 21st century. At Strata Scratch, we help you build a career in data science. We help you enhance your analytical skills by offering you over 40 + problem sets of SQL and Python. We have more than 80 datasets and guides to improve your analytical skills.
Although there a number of tools available in the market that promise to help you with analytically complex issues, data science is something that you can’t buy as software. You may use this software to assist you but you must have a sound knowledge of data science as well.
Strata Scratch is an ideal platform to learn data analytical skills and become a data scientist. Whether you are an aspiring data scientist, student or professional who has to deal with a large amount of data every day, we can help you learn basic data programming.
It is true that the use of software reduces the need for hiring in-house analytical experts. But it is not going to be as effective as it should be for organizations where data science is the competitive advantage of the product.
Here is why it’s not possible to automate data science completely and still expect a positive ROI. The reason is data science is 80% data cleansing and 20% model building.
The initial steps of data cleansing are quite easy and can easily be automated. However, the next steps are more complicated and need deep domain knowledge of your industry. After all, it often involves dealing with feature section and formation of new proxy metrics that characterize your business.
The rest 20% of data science is building the model using mathematical equations. It is you who choose the building model according to your business’s issues. But once you have implemented your model, how would you know that if the output is good or not in comparison to other approaches?
Consequently, the human component is important in data science. After all, it ensures that the data model best represents your business.
You should invest in a product that helps you save time on low-value tasks but it is also true that you shouldn't’ completely rely on them to make high-impact decisions.
Strata Scratch lets you practice basic and advanced SQL and Python and improve your marketing skills. If you want to pursue a career as a data scientist, you may signup for Strata Scratch and start learning today!