Read Data from MongoDB With Queries Overview In the previous guide,Read Data in MongoDB, you retrieved all documents from thesample_guides.planetscollection without specifying any criteria that the documents should meet. In this guide, you will query the collection and retrieve documents that match...
BasicDBObject query=newBasicDBObject("first", "q"); List<Double> results = collection.distinct("size", query);//运用distinct对象,distinct(key,[query])System.out.println("\nDistinct Sizes of words starting with Q: "); System.out.println(results.toString()); }publicstaticvoidfirstLetterOfLo...
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query.with(Sort.by(Sort.Direction.DESC,StatisticsConst.QUERY_CONDITION_OUT_CLASS_DATE));//查寻List<RefundOut> refundOuts = mongoTemplate.find(query, RefundOut.class, collectionName); 3.打印sql,在application.yml中配置log级别,即可在控制台打印执行的sql,但不能直接在Navicat执行,需要简单处理下格式。 l...
One way to find the result as with equivalent to a like query: db.collection.find({name:{'$regex' : 'string', '$options' : 'i'}}) Where i is used for a case-insensitive fetch data. Another way by which we can also get the result: db.collection.find({"name":/aus/}) The...
每次开机后启动 mongodb 时报 error:child process failed, exited with error number 1 错误,查看发现 /var/run/目录下的 mongodb/mongod.pid文件 不见了或者被自行删除了。 解决办法是:自行写个开机创建 mongodb/mongod.pid文件的脚本。 1.创建脚本为 mgopid.sh ...
query:可选,使用查询操作符指定查询条件 projection:可选,使用投影操作符指定返回的键。查询时返回文档中所有键值, 只需省略该参数即可(默认省略)。 pretty() 方法以格式化的方式来显示所有文档。 代码语言:txt 复制 db.col.insert({title: 'MongoDB 教程', ...
db.currentOp().inprog.forEach(function(item){if(item.op!="query"){print(item.opid);}}) 查找所有的操作: 代码语言:javascript 代码运行次数:0 复制 Cloud Studio代码运行 db.currentOp().inprog.forEach(function(item){print(item.op,item.opid);}); ...
(filter, document); //这里是因为我们改了超时时间 300s TimeUnit.SECONDS.sleep(360); mongoTemplate.getCollection("xxx").updateMany(filter, document); mongoTransactionManager.commit(transaction); } catch (Exception e) { e.printStackTrace(); } mongoTemplate.getCollection("xxx").find(query); System...
以后启动服务只需要net start MongoDB, 比稍微方便些, 以后电脑开机后就自动启动了,省的每次都要启动 2、mongo 用于客户端连接服务器 语法: mongo [IP:PORT][/DATABASE_NAME] IP默认的是127.0.0.1 Port默认的是27017 database默认的是test,mongodb中默认有两个数据库admin、local D:\Java\MongoDB\Server\bin...