http://docs.mongodb.org/manual/reference/sql-comparison/ In addition to the charts that follow, you might want to consider the Frequently Asked Questions section for a selection of common questions about MongoDB. Terminology and Concepts The followin…

SQL to Aggregation Mapping Chart https://docs.mongodb.com/manual/reference/sql-aggregation-comparison/ On this page Examples Additional Resources The aggregation pipeline allows MongoDB to provide native aggregation capabilities that corresponds to m…

有关关系型数据库跟Mongod的语法对比 In addition to the charts that follow, you might want to consider the Frequently Asked Questions section for a selection of common questions about MongoDB. Terminology and Concepts The following table presents the various SQL ter…

很多开发者首次接触数据库(通常是在高校课堂)的概念,或者说接触第一个数据库,通常是 SQL 数据库,而现在,NoSQL 数据库后来居上,很多原 SQL 数据的使用者难免有转向 NoSQL 的需求.而作为 NoSQL 数据库的代表,MongoDB 在社区越来越流行,生产环境的使用也日益广泛. 对于 SQL 转战 NoSQL的开发人员来说,最难的一步其实是将原有的 SQL 的概念和知识直接复用过来,最大化的减小学习的成本. 其实,这一步 MongoDB 官方已经为大家考虑到了,那就是在:MongoD…

使用SQL访问MongoDB 简介 使用SQL访问MongoDB有多种解决方案,就我所知的,除了今天要介绍的MongoDB Connector for BI外,还有Studio 3T,但后者只有在企业版中才提供,使用成本之高是可以想见的,而MongoDB Connector for BI则是MongoDB官方推出的,使用也相当方便. 本文以macOS为例进行说明,使用其他系统的同学也可以参考. MongoDB Connector for BI的作用如下图所示,它只是做为BI和MongoDB之间的…

SQL中的聚合函数和Mongodb中的管道相互对应的关系: WHERE $match GROUP BY $group HAVING $match SELECT $project ORDER BY $sort LIMIT $limit SUM() $sum COUNT() $sum join $lookup 例子: 先创建文档,填充数据 /* 0 */ { "_id" : ObjectId("5812b447311bb4272016496a"), "cust…

一.术语和概念的对比 SQL MongoDB database database     row document or BSON document column field index index table joins $lookup, embedded documents primary key Specify any unique column or column combination as primary key. primary key In MongoDB, the primar…

1.db.collection.updateMany() 修改集合中的多个文档. db.getCollection('user').find({"pId":"3332a512df604a74a72f267cf246"}).updateMany({"pId":"c8018dd802a644a19517790336f"}) 2.模糊查询 db.getCollection('user').find({name:{$regex:&qu…

驱动和客户端库 https://mongodb-documentation.readthedocs.org/en/latest/ecosystem/drivers.html#id2 https://mongodb-documentation.readthedocs.org/en/latest/ecosystem/drivers/cpp-to-sql-to-mongo-shell.html 论坛 日志 下载 驱动 活动 翻译 窗体顶端     窗体底端 编辑 GitHub 报告问题 SQL to …

SQL to MongoDB Mapping Chart In addition to the charts that follow, you might want to consider the Frequently Asked Questions section for a selection of common questions about MongoDB. Terminology and Concepts The following table presents the various…