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- Explain MySQL semi-synchronous replication.
- MySQL semi-synchronous replication balances data consistency and performance by waiting for at least one slave library to confirm before the master library returns to the client. 1) Enable semi-synchronous replication on the main library: SETGLOBALrpl_semi_sync_master_enabled=1;2) Enable semi-synchronous replication on the slave library: SETGLOBALrpl_semi_sync_slave_enabled=1; This method not only improves data consistency, but does not seriously affect performance like synchronous replication.
- Mysql Tutorial . Database 1007 2025-04-02 19:21:10
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- How do you detect and handle deadlocks in MySQL?
- Methods for detecting and handling deadlocks in MySQL include: 1. Use the SHOWENGINEINNODBSTATUS command to view deadlock information; 2. Use the data_locks table of performance Schema to monitor the lock status; 3. Ensure that transactions acquire locks in the same order to avoid holding locks for a long time; 4. Optimize transaction design and lock strategies, and adjust the deadlock detection switch if necessary.
- Mysql Tutorial . Database 881 2025-04-02 19:13:10
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- Explain different types of MySQL indexes (B-Tree, Hash, Full-text, Spatial).
- MySQL supports four index types: B-Tree, Hash, Full-text, and Spatial. 1.B-Tree index is suitable for equal value search, range query and sorting. 2. Hash index is suitable for equal value searches, but does not support range query and sorting. 3. Full-text index is used for full-text search and is suitable for processing large amounts of text data. 4. Spatial index is used for geospatial data query and is suitable for GIS applications.
- Mysql Tutorial . Database 1096 2025-04-02 19:05:10
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- Difference between clustered index and non-clustered index (secondary index) in InnoDB.
- The difference between clustered index and non-clustered index is: 1. Clustered index stores data rows in the index structure, which is suitable for querying by primary key and range. 2. The non-clustered index stores index key values ??and pointers to data rows, and is suitable for non-primary key column queries.
- Mysql Tutorial . Database 1117 2025-04-02 18:25:11
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- Explain InnoDB Full-Text Search capabilities.
- InnoDB's full-text search capabilities are very powerful, which can significantly improve database query efficiency and ability to process large amounts of text data. 1) InnoDB implements full-text search through inverted indexing, supporting basic and advanced search queries. 2) Use MATCH and AGAINST keywords to search, support Boolean mode and phrase search. 3) Optimization methods include using word segmentation technology, periodic rebuilding of indexes and adjusting cache size to improve performance and accuracy.
- Mysql Tutorial . Database 1323 2025-04-02 18:09:10
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- What are the key features and improvements in the latest version of MySQL?
- MySQL 8.0 enhances performance and security with features like atomic DDL, roles, and improved JSON support, aiding developers with large datasets.Character count: 159
- Mysql Tutorial . Database 577 2025-03-31 11:04:27
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- Explain the role of the performance schema in MySQL.
- The article discusses the performance schema in MySQL, which monitors server execution to aid in performance optimization and troubleshooting.
- Mysql Tutorial . Database 360 2025-03-31 11:03:33
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- How can you use user-defined functions (UDFs) to extend MySQL's functionality?
- Article discusses using user-defined functions (UDFs) in MySQL to extend functionality, including custom calculations, external library integration, and performance optimization.
- Mysql Tutorial . Database 708 2025-03-31 11:00:38
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- What are events in MySQL? How can you use them to schedule tasks?
- MySQL events automate tasks like data maintenance and backups within the database, offering benefits in efficiency and consistency.
- Mysql Tutorial . Database 1033 2025-03-31 10:59:40
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- How can you use triggers to automate database tasks?
- Article discusses using triggers to automate database tasks like data validation, auditing, and maintaining integrity, enhancing efficiency and reliability.
- Mysql Tutorial . Database 832 2025-03-31 10:58:42
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- Explain the use of spatial data types in MySQL.
- The article discusses MySQL's spatial data types for managing geometric data in GIS, detailing types like POINT, LINESTRING, and POLYGON, and their benefits for spatial queries and performance.
- Mysql Tutorial . Database 983 2025-03-31 10:56:38
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- What are generated columns in MySQL?
- The article discusses generated columns in MySQL, introduced in version 5.7.8, which are calculated from expressions using other columns. It explains virtual and stored types, their performance benefits, and practical use cases like age calculation a
- Mysql Tutorial . Database 997 2025-03-31 10:55:42
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- How can you use JSON data in MySQL?
- The article discusses using JSON data in MySQL, covering creation, insertion, updating, and querying methods. It highlights benefits like flexibility and ease of integration, but notes limitations such as performance overhead and lack of full ACID co
- Mysql Tutorial . Database 805 2025-03-31 10:54:35
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- Explain the use of common table expressions (CTEs) in MySQL.
- The article discusses the use of Common Table Expressions (CTEs) in MySQL, focusing on their application in simplifying complex queries, reusing subqueries, and handling recursive queries. It highlights performance benefits and improved readability t
- Mysql Tutorial . Database 204 2025-03-31 10:53:39
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