SQL Interview Question 面试的时候发现会问一些SQL的基本问题,在此总结一下。 ProgramInterview/SQL这个网站上的问题还比较全。 1. Join type INNER JOIN: Returns all rows when there is at least one match in BOTH tables LEFT JOIN: Return all r
(Note: I created this test question based on a real SQL interview question that I heard from a friend, who applied at one of the biggest social media companies (name starts with ‘F.’ ;)) Solution of SQL Interview Question #1
tmp.sql_class_question ) select uid,change_labelgroup,count(*) cnt--4、统计uid和变化标签分组的数量 from (select * ,sum(status_change_label) over(partition by uid order by log_time) change_labelgroup --3.2、对登录状态的变化点,分不同uid,按照登录时间进行累计统计分组 from tt where status=7...
Here’s thelinkto the question if you want to follow along with me. Technical Concepts Data analysts don’t regularly need to write algorithms. But when they do, it might be something that can help them in data analysis. This data analyst interview question is such an example because it a...
Database Research & Development: Can you disable the Clustered Index of table in SQL Server? Famous interview question and find the answer in this article.
sql interview question doc
This repo is a collection of all the Interview Query's SQL interview question. - GitHub - nehanawar025/interview_query_SQL: This repo is a collection of all the Interview Query's SQL interview question.
The next three interview questions should help you with that. 1. Average Weight of Medal-Winning Judo This is a question by ESPN you can find on StrataScratch. “Find the average weight of medal-winning Judo players of each team with a minimum age of 20 and a maximum age of 30. Conside...
题目 数据库中有三张表,如下: 写一段SQL语句,统计出下图数据集(期数为N期,不是固定的2期) 初始化数据 创建表 CREATE TABLE dbo.tb_product ( pr_id INT PRIMARY KEY NOT NULL, pr_no NVARCHAR(50) NOT NULL,
Question 7: Cookie coupons Question 8: Pie projections Question 9: Case in point Question 10: Cha-ching! Gorgeous code. Explained beautifully. The Practice Pack will teach you how to ace your SQL interview using gorgeous sample code and easy-to-follow, step-by-step model answer explanations....