如果从HackerRank首页进入，先点击Sign up and practice按钮，注册或登录 再在Prepare页面找到Prepare By T...
1. HackerRank From software engineering to data analytics, HackerRank is one of the best platforms for practicing coding interview questions.HackerRank’s SQL practicesuite has hundreds of questions available for you to practice. You can filter the questions by their difficulty levels: easy, medium, ...
Hands-On Practice:Dive headfirst into practical exercises and real-world scenarios to bolster your SQL proficiency. Engage with platforms like HackerRank to tackle coding challenges and refine your problem-solving skills. Interactive Learning Platforms:Explore interactive learning platforms such as DataCamp ...
pl/sql-work been created from solution of hackerrank examples sql oracle plsql sqldeveloper Updated May 1, 2018 PLSQL stchan / sqldeveloperinstaller Star 3 Code Issues Pull requests 64-bit Windows MSI package for Oracle SQL Developer (with JDK) windows installer oracle jdk msi 64-bit...
selectu.university,ROUND(count(q.question_id)/count(DISTINCT(q.device_id)),4)fromuser_profile ujoinquestion_practice_detail qonu.device_id=q.device_idgroupby1orderby1; SQL23 统计每个学校各难度的用户平均刷题数 题目:运营想要计算一些参加了答题的不同学校、不同难度的用户平均答题量,请你写SQL取出...
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Practice, Practice, Practice Learning all the concepts listed above will help you build a strong foundation of programming with SQL. However, in order to tackle real-world use-cases, you need to practice a lot. HackerRankandPGExercisesare two platforms that can help you do this. They have a...
Practice Regularly: Solve SQL problems on platforms like LeetCode, HackerRank, or SQLZoo to sharpen your skills. Optimize Queries: Focus on writing efficient queries by using proper indexing and understanding query plans. Know Advanced Concepts: Be prepared to discuss window functions, CTEs, normalizat...
HackerRankPractice Coding skills ExercismOver 48 languages and 2600 exercises LeetCodePractice programming online A better approach might be to actually write some DevOps related scripts or projects. Start simple. Here are some ideas: Write a script that gets a number of instances and a name of ...
This statement addsSomalias a new country into thecountriestable. It is a good practice to specify the column names and values when inserting rows into the table. Read a table When we want to look up the data that we stored in the database, we use theSelectstatement. ...