MongoDB 模糊查询
1. 插入数据¶
db.col.remove({}) db.col.find() db.col.insert({ title: 'Books 教程', description: 'Java 是由Sun Microsystems公司于1995年5月推出的高级程序设计语言。', by: 'cmz', url: 'https://caimengzhi.github.io/books', tags: ['Java', 'database', 'web'], likes: 200 }) db.col.insert({ title: 'Books 教程', description: 'Python 语言是最近比较流行的语言', by: 'cmz', url: 'https://caimengzhi.github.io/books', tags: ['Python', 'database', 'web'], likes: 150 }) db.col.insert({ title: 'Books 教程', description: 'MongoDB 是一个 Nosql 数据库', by: 'cmz', url: 'https://caimengzhi.github.io/books', tags: ['mongodb', 'database', 'NoSQL'], likes: 100 })
2. 包含查询¶
查询 description 包含"MongoDB"字的文档:
> db.col.find({description:/MongoDB/}) { "_id" : ObjectId("5c761ba5fec6d367f28a65da"), "title" : "Books 教程", "description" : "MongoDB 是一个 Nosql 数据库", "by" : "cmz", "url" : "https://caimengzhi.github.io/books", "tags" : [ "mongodb", "database", "NoSQL" ], "likes" : 100 }
3. 以什么开头查询¶
查询 description 字段以"Python"字开头的文档:
> db.col.find({description:/^Python/}) { "_id" : ObjectId("5c761ba5fec6d367f28a65d9"), "title" : "Books 教程", "description" : "Python 语言是最近比较流行的语言", "by" : "cmz", "url" : "https://caimengzhi.github.io/books", "tags" : [ "Python", "database", "web" ], "likes" : 150 }
4. 已什么结尾查询¶
查询 title字段以"教"字结尾的文档:
> db.col.find({description:/语言$/}) { "_id" : ObjectId("5c761ba5fec6d367f28a65d9"), "title" : "Books 教程", "description" : "Python 语言是最近比较流行的语言", "by" : "cmz", "url" : "https://caimengzhi.github.io/books", "tags" : [ "Python", "database", "web" ], "likes" : 150 }