MongoDB Community: ソースが利用可能で、無料で使用できる自己管理型の MongoDB のバージョン 構文 $regexを使うには、以下の構文のいずれかを使います。 { <field>: {$regex:/pattern/,$options:'<options>'} } {"<field>": {"$regex":"pattern","$options":"<options>"} } ...
db.user_info.find({"name":{"$not":{"$regex":/^liu/}}}) View Code 或者使用 db.user_info.find({"name":{"$not":{"$regex":"^liu"}}}) View Code 经测试,mongodb的正则表达式中/可以用“代替,这样在java代码调用时也比较容易,如下使用“代替/测试 6、查询name中包含liu的名称 db.user_inf...
mongodb You need to create a regular expression object from the string using theRegExpconstructor as the/.../syntax is only for use with literals. var stream = collection.find({"FirstName": new RegExp(val)}).stream(); If you want to use the variablevalas a parameter of the query par...
var cursor = db.collectioName.find(query,projection); Cursor.hasNext() ,判断游标是否已经取到尽头 Cursor. Next() , 取出游标的下1个单元 用while来循环游标 > var mycursor = db.bar.find({_id:{$lte:5}}) > while(mycursor.hasNext()) { ... printjson(mycursor.next()); ... } 1. 2....
连接MongoDB数据库: 代码语言:txt 复制 client = pymongo.MongoClient("mongodb://localhost:27017/") db = client["your_database"] collection = db["your_collection"] 构建正则表达式查询条件: 代码语言:txt 复制 import re regex = re.compile("^[0-9]+$") ...
mongodb 字符串查找匹配中$regex的用法 官网地址:https://docs.mongodb.com/manual/reference/operator/query/regex/#regex-case-insensitive 举个例子来说:现在有以下集合(官网的例子): { "_id" : 100, "sku" : "abc123", "description" : "Single line description." } { "_id" : 101, "sku" : ...
MongoDB uses Perl compatible regular expressions (i.e. "PCRE" ) version 8.41 with UTF-8 support. Prior to MongoDB 4.2, aggregation pipeline can only use the query operator $regex in the $match stage. For more information on using regex in a query, see $regex. ...
Query query = Query.query(criteria); log.info("流程:{}", query); List<BasicDBObject> basicDBObjects = mongoTemplate.find(query, BasicDBObject.class,"testelemMatch3"); log.info("最终数据{}", JSON.toJSONString(basicDBObjects));
db.linlin.findOne([query]) 返回符合条件的一条数据 db.linlin.getDB() 返回此数据集所属的数据库名称 db.linlin.getIndexes() 返回些数据集的索引信息 db.linlin.group({key:...,initial:...,reduce:...[,cond:...]}) db.linlin.mapReduce(mayFunction,reduceFunction,<optional params>) ...
the following mongodb command can be used : >db.student.find( { f_name: { $regex: 'P.*'} } ).pretty(); N.B.find() method displays the documents in a non structured format but to display the results in a formatted way, the pretty() method can be used. ...