SQL在线测试

Q: 我可以在同一测试中评估其他相关技能，例如Python吗？

是的。我们支持在一次测试中筛选多个技能。您可以查看我们的[标准Python测试]（<a href='https://www.adaface.com/assessment-test/python-online-test%EF%BC%89%EF%BC%8C%E4%BB%A5%E4%BA%86%E8%A7%A3%E6%88%91%E4%BB%AC%E4%BD%BF%E7%94%A8%E5%93%AA%E4%BA%9B%E7%B1%BB%E5%9E%8B%E7%9A%84%E9%97%AE%E9%A2%98%E6%9D%A5%E8%AF%84%E4%BC%B0Python%E6%8A%80%E8%83%BD%E3%80%82%E6%B3%A8%E5%86%8C%E4%BB%BB%E4%BD%95%E8%AE%A1%E5%88%92%E5%90%8E%EF%BC%8C%E6%82%A8%E5%8F%AF%E4%BB%A5%E8%AF%B7%E6%B1%82%E8%87%AA%E5%AE%9A%E4%B9%89%E8%AF%84%E4%BC%B0%EF%BC%8C%E4%BB%A5%E6%A0%B9%E6%8D%AE%E6%82%A8%E7%9A%84%E8%81%8C%E4%BD%8D%E6%8F%8F%E8%BF%B0%E8%BF%9B%E8%A1%8C%E8%87%AA%E5%AE%9A%E4%B9%89%E3%80%82%E8%87%AA%E5%AE%9A%E4%B9%89%E8%AF%84%E4%BC%B0%E5%B0%86%E5%8C%85%E6%8B%AC%E6%9C%89%E5%85%B3SQL%E8%A7%92%E8%89%B2%E6%89%80%E9%9C%80%E7%9A%84%E6%89%80%E6%9C%89%E5%BF%85%E5%A4%87%E6%8A%80%E8%83%BD%E7%9A%84%E9%97%AE%E9%A2%98%E3%80%82'>https://www.adaface.com/assessment-test/python-online-test），以了解我们使用哪些类型的问题来评估Python技能。注册任何计划后，您可以请求自定义评估，以根据您的职位描述进行自定义。自定义评估将包括有关SQL角色所需的所有必备技能的问题。

About the test:

SQL Online测试评估了候选人从头开始设计和构建关系数据库和表的能力，应用CRUD选项，编写有效的查询和子查询来过滤数据并为更快的SQL查询创建有效的索引。

Covered skills:

创建数据库
桌子上的CRUD操作
条件表达式和程序
索引
数学功能和时间戳
比例和安全性

创建和删除表
加入＆subquies
视图
字符串功能
锁和交易

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9 reasons why

Adaface SQL在线测试 is the most accurate way to shortlist 数据库管理员s

Reason #1

Tests for on-the-job skills

The SQL在线测试 helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

有效创建和管理数据库的能力
能够使用适当的数据类型和约束创建和删除表
能够在表上执行CRUD操作，包括插入，更新和删除
能够编写和理解涉及加入和子征服的复杂查询
能够使用条件表达式并为数据操纵创建程序
能够创建和使用数据抽象的视图
实施索引以优化查询性能的能力
能够利用字符串功能进行数据操作和分析
能够使用数学功能和时间戳进行数据计算的能力
能够处理数据一致性的锁和交易的能力
能够扩展和保护数据库以高效且安全的数据存储

Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface

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Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

这些只是我们库中有10,000多个问题的一个小样本。关于此的实际问题 SQL在线测试将是不可行的.

🧐 Question
Medium Multi Select JOIN GROUP BY	Try practice test
Consider the following SQL table: How many rows does the following SQL query return?
Medium nth highest sales Nested queries User Defined Functions	Try practice test
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
Medium Select & IN Nested queries	Try practice test
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
Medium Sorting Ubers Nested queries Join Comparison operators	Try practice test
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
Hard With, AVG & SUM MAX() MIN() Aggregate functions	Try practice test
Consider the following SQL table: How many tuples does the following query return?

	🧐 Question	🔧 Skill
	Medium Multi Select JOIN GROUP BY	2 mins SQL	Try practice test
Consider the following SQL table: How many rows does the following SQL query return?
	Medium nth highest sales Nested queries User Defined Functions	3 mins SQL	Try practice test
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
	Medium Select & IN Nested queries	3 mins SQL	Try practice test
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
	Medium Sorting Ubers Nested queries Join Comparison operators	3 mins SQL	Try practice test
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
	Hard With, AVG & SUM MAX() MIN() Aggregate functions	2 mins SQL	Try practice test
Consider the following SQL table: How many tuples does the following query return?

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Multi Select JOIN GROUP BY	SQL	Medium	2 mins	Try practice test
Consider the following SQL table: How many rows does the following SQL query return?
	nth highest sales Nested queries User Defined Functions	SQL	Medium	3 mins	Try practice test
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
	Select & IN Nested queries	SQL	Medium	3 mins	Try practice test
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
	Sorting Ubers Nested queries Join Comparison operators	SQL	Medium	3 mins	Try practice test
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
	With, AVG & SUM MAX() MIN() Aggregate functions	SQL	Hard	2 mins	Try practice test
Consider the following SQL table: How many tuples does the following query return?

Reason #4

1200+ customers in 75 countries

借助 Adaface，我们能够将初步筛选流程优化达 75% 以上，为招聘经理和我们的人才招聘团队节省了宝贵的时间！

Brandon Lee, 人事主管, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment SQL在线测试 in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the SQL在线测试 from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

Reason #7

Detailed scorecards & benchmarks

查看样本记分卡

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Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

Reason #9

Advanced Proctoring

Learn more

Preview this test

查看样本记分卡

About the SQL在线测试

Why you should use SQL在线测试?

The SQL在线测试 makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

创建数据库
创建和删除表
桌子上的CRUD操作
加入＆subquies
条件表达式和程序
视图
索引
字符串功能
数学功能和时间戳
锁和交易

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the SQL在线测试?

创建数据库：
此技能涉及创建数据库，数据库是可以访问，管理和操纵的数据集合的数据库。评估这项技能至关重要，因为它构成了任何与数据库相关的任务的基础，并确保测试者对数据库概念有很强的了解，并且可以以结构化的方式有效地与数据有效合作。
创建并删除表：
此技能评估创建和删除表的能力，这些能力是用于将有组织数据存储在数据库中的结构。评估此技能有助于确定测试者是否可以有效地设计和管理数据库的结构，以确保数据以适当的格式存储并可以有效地检索。
CRUD操作在表上：
crud（创建，读取，更新，删除）操作参考数据库表中数据执行的基本操作。测试此技能使招聘人员可以通过创建，阅读，更新和删除数据库中的记录来查看测试者是否熟练管理数据，这对于有效地使用数据至关重要。
加入＆Subquies：
基于指定条件结合不同表中的行，而子征值是嵌套在另一个查询中的查询。衡量此技能对于评估测试者使用联合使用多个表中的数据和组合数据的能力以及它们在使用子查询方面的熟练度来进行更复杂的查询很重要。
条件表达式和过程：</h4 > <p>此技能涉及使用条件表达式和程序来控制数据流并根据特定条件执行操作。评估这项技能至关重要，因为它决定了测试者实施逻辑操作，自动化任务并根据条件处理复杂的数据操作的能力。</p> <h4>视图：
视图是虚拟的从查询的结果集得出的表。测试此技能可确保测试者可以有效地创建和利用视图，这提供了一种简化和结构化的方法来访问和分析数据，有助于提高性能并简化查询写作。
索引：
索引是数据结构，可提高数据库表上数据检索操作的速度。评估此技能使招聘人员可以查看测试者是否了解创建和管理索引的重要性，这可以显着提高查询性能并优化数据库的整体效率。
字符串功能：</h4> <</h4> <</h4> < P>此技能涉及各种功能来操纵和分析数据库中的文本数据。测量此技能对于评估测试者使用字符串数据，执行字符串操作并将字符串功能应用于诸如搜索，格式化和解析文本等任务的能力很重要。</p> <h4>数学功能和时间戳：
此技能评估使用数学功能并与数据库中的时间戳（日期和时间数据）一起使用的能力。评估此技能至关重要，因为它可以确保接受测试者可以使用数学函数执行计算，聚集和比较，并有效地处理数据库操作中的时间数据。
Full list of covered topics
The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for SQL在线测试 to be based on.
创建数据库
管理数据库
创建表
删除表
数据类型
表约束
插入数据
更新数据
删除数据
加入
子征服
条件表达式
程序
视图
数据抽象
索引
查询性能
字符串功能
数学功能
时间戳
锁
交易
扩展数据库
确保数据库
数据存储
数据操纵
数据分析
数据计算
数据一致性
效率
安全

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What roles can I use the SQL在线测试 for?

数据库管理员
SQL开发人员
数据分析师
商业智能开发人员
软件工程师
数据工程师
数据科学家
数据架构师
系统分析师
高级SQL开发人员
业务分析师（SQL）

How is the SQL在线测试 customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like