knex.js 是一个查询构建器，用于 PostgreSQL, MySQL 和 SQLite3。它设计灵活，轻便和有趣。特性：transactionsconnection poolingstreaming queriesboth a promise and callback APIa thorough test suitethe ability to run in the Browser例子：var knex = require('knex')({   dialect: 'sqlite3',   connection: {     filename: './data.db'   }