SQL quiz questions. For example: “What is a primary key?” Or “List the different types of JOINs!” That’s a stupid type of SQL tech assessment — as it focuses on theory and not on practice. Still, some companies… you know. Take-home SQL assignment. You get a more complex task...
This tutorial is designed for people who want to answer questions with data. For many, SQL is the "meat and potatoes" of data analysis—it's used for accessing, cleaning, and analyzing data that's stored in databases. It's very easy to learn, yet it's employed by the world's largest...
Practice coding in SQL and Python and solve as many actualdata analyst interview questions. But also don’t forget to use other resources and practice other data analysis skills. Coding is important, but it’s not everything. Nate Rosidiis a data scientist and in product strategy. He's also...
This tutorial is designed for people who want to answer questions with data. For many, SQL is the "meat and potatoes" of data analysis—it's used for accessing, cleaning, and analyzing data that's stored in databases. It's very easy to learn, yet it's employed by the world's largest...
This tutorial is designed for people who want to answer questions with data. For many, SQL is the "meat and potatoes" of data analysis—it's used for accessing, cleaning, and analyzing data that's stored in databases. It's very easy to learn, yet it's employed by the world's largest...
explanation. Questions start you off at beginner level and get more challenging towards the end.I was hoping for more after I reached the end. Her approach gets you started without any nonsense. I highly recommend this book and it should be on every data analyst's shelf (beginner to ...
sqlsqlitepostgresqlrelational-databaseslearning-sqlsql-exerciseslearn-sqlsql-practicesql-practice-problems UpdatedSep 12, 2022 My solutions to SQL Zoo exercises mysqlsqlsql-zoosql-exercises UpdatedApr 13, 2021 This project demonstrates the integration of Python with MySQL databases for data analysis workf...
Before the big day, be sure to carefully study the different types of JOIN clauses and be prepared to answer JOIN-centric questions from your recruiter.Here are 5 practice interview questions to get you started.New: Sign up for a free SQL mini-course Make sure you're prepared for the ...
SQL Practice Exercises: Work on diverse queries like filtering, joining, and aggregating data to build your expertise. Test your knowledge with interactive quizzes that cover basic to advanced SQL concepts. Common SQL Interview Questions and Answers Prepare for SQL interviews with commonly asked ques...
sql("use sparkpractice") // 0 注册自定义聚合函数 spark.udf.register("city_remark", new AreaClickUDAF) // 1. 查询出所有的点击记录,并和城市表产品表做内连接 spark.sql( """ |select | c.*, | v.click_product_id, | p.product_name |from user_visit_action v join city_info c join ...