Summary of the latest mysql interview questions in 2022
In the job search process, if we can master a large number of relevant interview questions in advance, it will undoubtedly be very helpful to us. If we come prepared, of course we will pass the interview. The probability will be much greater!
php Chinese website, as a well-known learning platform in China, contains a large number of mysql graphic tutorials, mysql video tutorials, and mysql advanced tutorials. Naturally, it has also compiled the most popular and comprehensive mysql interview questions for everyone. I hope Helpful to everyone.
Mysql interview questions summary:
《Collection! Will be used in the interview, MySQL common interview questions》
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《Collected MySQL interview questions to share with everyone_MySQL》
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Sprint Douban (20): mysql basic interview questions_MySQL》
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About the thinking and solution process of a mysql query interview question》
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2014 Alibaba intern interview question How does MySQL implement indexing》
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MySQL Authoritative Development Guide (Tutorial)》
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Six days to take you through MySQL video tutorial》
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MySQL advanced advanced video tutorial》
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MySQL Data Management Backup and Recovery Case Analysis Video Tutorial》
【Special Interview Questions】Front-end:【Front-end interview questions】【js interview questions】【 vue interview Question】【ajax interview questions】【react interview questions】
Database:【mysql interview questions】【 redis interview questions】【oracle interview questions】
Backend:【PHP interview questions】【thinkphp interview questions】【 python interview questions】【java interview questions】【android interview questions】
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MySQLoffersvariousstorageengines,eachsuitedfordifferentusecases:1)InnoDBisidealforapplicationsneedingACIDcomplianceandhighconcurrency,supportingtransactionsandforeignkeys.2)MyISAMisbestforread-heavyworkloads,lackingtransactionsupport.3)Memoryengineis

Common security vulnerabilities in MySQL include SQL injection, weak passwords, improper permission configuration, and unupdated software. 1. SQL injection can be prevented by using preprocessing statements. 2. Weak passwords can be avoided by forcibly using strong password strategies. 3. Improper permission configuration can be resolved through regular review and adjustment of user permissions. 4. Unupdated software can be patched by regularly checking and updating the MySQL version.

Identifying slow queries in MySQL can be achieved by enabling slow query logs and setting thresholds. 1. Enable slow query logs and set thresholds. 2. View and analyze slow query log files, and use tools such as mysqldumpslow or pt-query-digest for in-depth analysis. 3. Optimizing slow queries can be achieved through index optimization, query rewriting and avoiding the use of SELECT*.

To monitor the health and performance of MySQL servers, you should pay attention to system health, performance metrics and query execution. 1) Monitor system health: Use top, htop or SHOWGLOBALSTATUS commands to view CPU, memory, disk I/O and network activities. 2) Track performance indicators: monitor key indicators such as query number per second, average query time and cache hit rate. 3) Ensure query execution optimization: Enable slow query logs, record and optimize queries whose execution time exceeds the set threshold.

The main difference between MySQL and MariaDB is performance, functionality and license: 1. MySQL is developed by Oracle, and MariaDB is its fork. 2. MariaDB may perform better in high load environments. 3.MariaDB provides more storage engines and functions. 4.MySQL adopts a dual license, and MariaDB is completely open source. The existing infrastructure, performance requirements, functional requirements and license costs should be taken into account when choosing.

MySQL uses a GPL license. 1) The GPL license allows the free use, modification and distribution of MySQL, but the modified distribution must comply with GPL. 2) Commercial licenses can avoid public modifications and are suitable for commercial applications that require confidentiality.

The situations when choosing InnoDB instead of MyISAM include: 1) transaction support, 2) high concurrency environment, 3) high data consistency; conversely, the situation when choosing MyISAM includes: 1) mainly read operations, 2) no transaction support is required. InnoDB is suitable for applications that require high data consistency and transaction processing, such as e-commerce platforms, while MyISAM is suitable for read-intensive and transaction-free applications such as blog systems.

In MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.


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