Course Intermediate  3410

Course Introduction：This set of courses is based on the design concept and data structure of MySQL index, index usage scenarios, index classification, index usage scenarios, index performance analysis, query optimization, slow query of MySQL index, etc. It mainly describes the solution of MySQL index optimization. It is very suitable for students who have basic knowledge of MySQL or have certain work experience. The course explains how to solve the problem of slow large-volume queries, how to write an efficient SQL, how to optimize query statements, what is the implementation principle of indexes, how to optimize indexes... and many other difficulties and interview points in SQL index optimization.

Course Intermediate  11242

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Course Advanced  17579

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Course Introduction：MySQL index types include normal index, unique index, full-text index, spatial index and hash index. Indexing methods are BTREE, HASH, and RTREE. Choosing the appropriate index type and method depends on the data type and query mode, such as using a normal index or a hash index for range searches, using a full-text index for full-text searches, and using a spatial index for spatial queries. Using indexes improves query speed, reduces data I/O, and enforces data integrity.

2024-04-22 comment 0  671

Course Introduction：The main content of this article: display multiple indexes in the table show all index add index ADD INDEX, add unique index add unique index multi-column jointly add index, primary key keyword index vs key show all index show index from tb_name For example: show index from springdemo .blog;Add index ADD INDEX, add unique

2017-09-26 comment 0  1799

Course Introduction：Today's MySQL database column introduces the comparison between MySQL index and ElasticSearch index.

2020-10-09 comment 0  1903

Course Introduction：1. Index type Index can be divided into B-Tree index and hash index according to the underlying implementation. Most of the time we use B-Tree index because its good performance and characteristics are more suitable for building high-concurrency systems. According to the storage method of the index, the index can be divided into clustered index and non-clustered index. The characteristic of a clustered index is that the leaf nodes contain complete record rows, while the leaf nodes of a non-clustered index only have all fields and primary key IDs. According to clustered index and non-clustered index, it can be further divided into ordinary index, covering index, unique index and joint index. 2. Clustered index and non-clustered index Clustered index is also called clustered index. It is not actually a separate index type, but a data storage method. The clustered index

2023-05-26 comment 0  2274