Backend

Backend Npm

Golang 包 Go get 接口 type Logger interface{ Log(message string) } MySQL 基础语法 - SELECT 提取数据 - UPDATE 更新数据 - DELETE 删除数据 - INSERT INTO 插入数据 - CREATE DATABASE 创建数据库 - ALTER DATABASE 修改数据库 - CREATE TABLE 创建表 - ALTER TABLE 修改表 - DROP TABLE　删除表 - CREATE INDEX 创建索引 - DROP INDEX 删除索引 - GROUP BY - HAVING - CASE 关键字 - Order by asc|desc 排序（默认升序） - AS 创建别名 运算符 - IS NULL - IS NOT NULL - LIKE 通配符% _ - IN - BETWEEN - NOT BETWEEN - UNION UNION ALL - EXISTS - ANY - ALL 函数 - MAX() - MIN() - AVG() - SUM() - COUNT() - IFNULL() - COALESCE() Join - INNER JOIN - LEFT JOIN - RIGHT JOIN - CROSS JOIN 注释 --单行注释 /多行 注释/ SELECT * FROM Customers LIMIT 3 OFFSET 3; SELECT DISTINCT;

SELECT * FROM Cutomers WHERE Country = 'Mexico' INSERT INTO table_name(column1,column2) VALUES (value1,value2); UPDATE Customers SET PostalCode = 00000 WHERE Country = 'Mexico';

SELECT Orders.OrderID, Customers.CustomerName,Orders.OrderDate From Orders INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID; Trpc 放弃了console.log和fmt.log，试一试日志框架

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