Set 1 - SQL Interview Questions and Answers 1) State the different subsets of SQL. There are basically three subsets of SQL: Data Definition Language, or DDL, which lets the candidate carry out different functions and perform tasks on the Database, is one of the most important subsets of S...
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...
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 interview that could change your career. Sign up to receive five free must-learn lessons in preparation for your SQL interview. Start preparing today! First...
Comprehensive, community-driven list of essential SQL interview questions. Whether you're a candidate or interviewer, these interview questions will help prepare you for your next SQL interview ahead of time.
38. What are the TRUNCATE, DELETE and DROP statements? 39. What is the difference between DROP and TRUNCATE statements? 40. What is the difference between DELETE and TRUNCATE statements? 41. What are Aggregate and Scalar functions? PostgreSQL Interview Questions SQL MCQ Learn...
比如:用 PlaylistTrack 可以工作,但是用 playlisttrack 不准确 ] for question in questions: write_query({"question": question}) 测试结果如下:How many Employees are there?Which country’s customers spent the most?Describe the PlaylistTrack table qwen2.5 SELECT COUNT(*) AS EmployeeCount FROM ...
from pyspark.sql.window import Window from pyspark.sql.functions import avg, desc, rank windowSpec = Window.partitionBy("country").orderBy(desc("avg_age")) result = data.groupBy("country").agg(avg("age").alias("avg_age")) result = result.select("country", "avg_age", rank().over(...
This error message looks daunting, especially if you’re new to SQL. However, it’s essential to remember that syntax errors are common, and with some practice, you can learn to avoid them. Understanding SQL Syntax SQL syntax is a crucial aspect of database management. You can create, modi...
Get interview-ready with this comprehensive overview of essential SQL questions and answers for job hunters, hiring managers, and recruiters. Elena Kosourova 15 min blog 10 Portfolio-Ready SQL Projects for All Levels Select your first—or next—SQL project to practice your current SQL skills, dev...
SQL_exercise_06 SQL_exercise_07 SQL_exercise_08 SQL_exercise_09 SQL_exercise_10 README.md SQL-exercise Schemas, Questions & Solutions for SQL Exercising Introduction The schemas and questions are [1] from WikibookSQL Exercises[https://en.wikibooks.org/wiki/SQL_Exercises]. Solutions are from ...