Found a total of 10000 related content
Explain B-Tree indexes in MySQL and how they work.
Article Introduction：B-Tree indexes in MySQL accelerate data retrieval by creating indexes on columns of tables, significantly reducing the amount of data that needs to be scanned during queries, thereby improving query performance. 1) Create a B-Tree index using a CREATEINDEX statement, such as CREATEINDEXidx_ageONemployees(age). 2) The working principle of B-Tree index includes structure, query process, and automatic adjustment during insertion and deletion. 3) Use the EXPLAIN command to debug the problem that the index is not used. 4) Performance optimization suggestions include selecting appropriate columns, using overlay indexes, regular maintenance, as well as maintaining code readability and testing and monitoring.
2025-04-08
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1129
Explain different types of MySQL indexes (B-Tree, Hash, Full-text, Spatial).
Article Introduction：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.
2025-04-02
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1135
What is a B-Tree index?
Article Introduction：B-Treeindexesmatterbecausetheyenablefastandefficientdataretrievalindatabasesbymaintainingsorteddataandallowinglogarithmictimecomplexityforsearch,insertion,anddeletionoperations.Theyautomaticallybalancethemselvestopreventperformancedegradationasdatais
2025-06-20
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475
Nested Tree vs Flat Tree
Article Introduction：Tree components are very common and practical. Do you notice that not all tree components are nested structures?
background
Our goal is to visualize tree -shaped data structures in the browser.
// A basic tree -shaped data structure
const timedata = {
ID: 0,
name: "root",
children: [[
{{
ID: 1,
name: "node 1",
children: [[
{{
2025-01-24
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913
Cousins in Binary Tree II
Article Introduction：2641. Cousins in Binary Tree II
Difficulty: Medium
Topics: Hash Table, Tree, Depth-First Search, Breadth-First Search, Binary Tree
Given the root of a binary tree, replace the value of each node in the tree with the sum of all its cousins' values.
2024-10-24
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599
Reverse Odd Levels of Binary Tree
Article Introduction：2415. Reverse Odd Levels of Binary Tree
Difficulty: Medium
Topics: Tree, Depth-First Search, Breadth-First Search, Binary Tree
Given the root of a perfect binary tree, reverse the node values at each odd level of the tree.
For example, suppose t
2025-01-01
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506
. Find Largest Value in Each Tree Row
Article Introduction：515. Find Largest Value in Each Tree Row
Difficulty: Medium
Topics: Tree, Depth-First Search, Breadth-First Search, Binary Tree
Given the root of a binary tree, return an array of the largest value in each row of the tree (0-indexed).
Example 1:
2024-12-29
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800
Kth Largest Sum in a Binary Tree
Article Introduction：2583. Kth Largest Sum in a Binary Tree
Difficulty: Medium
Topics: Tree, Breadth-First Search, Sorting, Binary Tree
You are given the root of a binary tree and a positive integer k.
The level sum in the tree is the sum of the values of the nodes t
2024-10-23
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686
Height of Binary Tree After Subtree Removal Queries
Article Introduction：2458. Height of Binary Tree After Subtree Removal Queries
Difficulty: Hard
Topics: Array, Tree, Depth-First Search, Breadth-First Search, Binary Tree
You are given the root of a binary tree with n nodes. Each node is assigned a unique value from 1
2024-11-03
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446
Tree Shaking in JS
Article Introduction：Understanding Tree Shaking in JavaScript: A Complete Guide
In the world of modern web development, optimizing your application's performance is crucial. One powerful technique to achieve smaller and faster JavaScript bundles is Tree Shaking. If
2025-01-07
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1042
How to Print Binary Tree Diagrams in Java?
Article Introduction：Printing Binary Tree Diagrams in JavaIntroduction:Visualizing the structure of a binary tree is crucial for facilitating understanding and...
2024-11-16
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887
Building an LSM-Tree Storage Engine from Scratch
Article Introduction：Preface
This article will guide you through understanding the Log-Structured Merge-Tree (LSM-Tree), including its core concepts and structure. By the end, you'll be able to build your own storage engine based on LSM-Tree from scratch.
2025-01-03
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744
How to Visualize Binary Tree Diagrams in Java?
Article Introduction：Binary Tree Diagram Visualization in JavaPrinting a binary tree in a graphical format can provide a clear representation of its structure. In...
2024-11-19
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912
