Contents 1. What is ICN? 2. ICNT latest updates 3. Comparison and economic model between ICN and other DePIN projects and economic models 4. Conclusion of the next stage of the DePIN track At the end of May, ICN (ImpossibleCloudNetwork) @ICN_Protocol announced that it had received strategic investment in NGPCapital with a valuation of US$470 million. Many people's first reaction was: "Has Xiaomi invested in Web3?" Although this was not Lei Jun's direct move, the one who had bet on Xiaomi, Helium, and WorkFusion

Blockchain technology has spawned many independent networks, such as Ethereum, Binance Smart Chain, Polygon, etc. Each network has its own unique design and protocol. However, this independence also presents the challenge of difficult assets and information flowing freely between different chains. For example, ERC-20 tokens on Ethereum cannot be used directly on the Polygon network. In order to solve this isolation problem, cross-chain bridges emerged and became the key infrastructure to connect different blockchain networks.

The DISTINCT keyword is used in SQL to remove duplicate rows in query results. Its core function is to ensure that each row of data returned is unique and is suitable for obtaining a list of unique values ??for a single column or multiple columns, such as department, status or name. When using it, please note that DISTINCT acts on the entire row rather than a single column, and when used in combination with multiple columns, it returns a unique combination of all columns. The basic syntax is SELECTDISTINCTcolumn_nameFROMtable_name, which can be applied to single column or multiple column queries. Pay attention to its performance impact when using it, especially on large data sets that require sorting or hashing operations. Common misunderstandings include the mistaken belief that DISTINCT is only used for single columns and abused in scenarios where there is no need to deduplicate D

The main difference between WHERE and HAVING is the filtering timing: 1. WHERE filters rows before grouping, acting on the original data, and cannot use the aggregate function; 2. HAVING filters the results after grouping, and acting on the aggregated data, and can use the aggregate function. For example, when using WHERE to screen high-paying employees in the query, then group statistics, and then use HAVING to screen departments with an average salary of more than 60,000, the order of the two cannot be changed. WHERE always executes first to ensure that only rows that meet the conditions participate in the grouping, and HAVING further filters the final output based on the grouping results.

Oracleensurestransactiondurabilityandconsistencyusingredoforcommitsandundoforrollbacks.Duringacommit,Oraclegeneratesacommitrecordintheredologbuffer,markschangesaspermanentinredologs,andupdatestheSCNtoreflectthecurrentdatabasestate.Forrollbacks,Oracle

Hello, JavaScript developers! Welcome to this week's JavaScript news! This week we will focus on: Oracle's trademark dispute with Deno, new JavaScript time objects are supported by browsers, Google Chrome updates, and some powerful developer tools. Let's get started! Oracle's trademark dispute with Deno Oracle's attempt to register a "JavaScript" trademark has caused controversy. Ryan Dahl, the creator of Node.js and Deno, has filed a petition to cancel the trademark, and he believes that JavaScript is an open standard and should not be used by Oracle

OracleDataDictionary is the core read-only structure of Oracle databases to store metadata, providing information such as database objects, permissions, users and status. 1. The main views include USER_xxx (current user object), ALL_xxx (current user access object) and DBA_xxx (full library objects require DBA permission). 2. Metadata such as table column information, primary key constraints, table annotations, etc. can be obtained through SQL query. 3. Usage scenarios cover development structure review, debug permission analysis, query performance optimization and automated script generation. Mastering naming rules and common views can efficiently obtain database configuration and structure information.

The role of roles in Oracle database is to simplify user permission management by grouping relevant permissions, improving efficiency and accuracy. Specific advantages include: 1. Simplify permission allocation. DBAs do not need to grant the same permissions to users one by one, but create roles containing specific permissions and grant them to users in batches; 2. Implement centralized access control, and permission changes only require updating roles to synchronize to all relevant users, reducing the risk of duplicate operations and errors; 3. Support default roles and nested roles, and provide automatic permission activation, hierarchical permission structure and other functions to enhance flexibility and management elaboration. These features make roles a key tool for efficient and secure management of database access.