private DBObject timeCondi(long startTimeStamp, long endTimeStamp){ DBObject queryCondition = new BasicDBObject("$gte", startTimeStamp).append("$lte", endTimeStamp); BasicDBObject query = new BasicDBObject("timeStamp", queryCondition); return query; }...
private DBObject timeCondi(long startTimeStamp, long endTimeStamp){ DBObject queryCondition = new BasicDBObject("$gte", startTimeStamp).append("$lte", endTimeStamp); BasicDBObject query = new BasicDBObject("timeStamp", queryCondition); return query; }...
andQuery.put("$and", andCondi);returnandQuery; } 条件3:记录 的count字段 大于某个阈值,比如: count > 10000 privateDBObject countCondi(intsize) { DBObject queryCondition=newBasicDBObject("$gte", size); BasicDBObject query=newBasicDBObject("count", queryCondition);returnquery; } WINDOWS下安装...
在MongoDB中,可以使用$and操作符来查询具有"and"关系的两个条件。 查询的语法格式为: 代码语言:txt 复制 db.collection.find({ $and: [ { condition1 }, { condition2 } ] }) 其中,collection是要查询的集合名称,condition1和condition2是两个条件。 以下是对各个部分的详细解释: db.collection.find():这...
import com.mongodb.MongoClient; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoCursor; import com.mongodb.client.MongoDatabase; import org.bson.Document; import static com.mongodb.client.model.Filters.*; public class MongoDBJavaConditionQuery { public static void main(...
$: Acts as a placeholder to update the first element that matches the query condition in an update. 示例1,使用empty filter作为query filter db.users.updateMany( {}, {$inc:{"comments.$.unlikes":1}} ) 1. 2. 3. 4. MongoDB抛出错误消息: ...
/** * criteria.and().is() 在这里是构建了一个精准查询的条件,并且用 'and' 相连 * query.addCriteria 把条件封装起来 */ query.addCriteria(criteria.and("你MongoDB中的key").is("你的条件"); ④ 来一个在某个值之间的条件(类似于sql中的BETWEEN ... AND) 如果在这里,模仿精准查询,把 is()...
Set Query Filter Examples Match by a Single Condition Match by Multiple Conditions ($and) Match by Multiple Possible Conditions ($or) Match by Exclusion ($not) Match with Comparison Operators Match by Date Match by Array Conditions Match by Substring Match by Embedded Field Supported Data Types ...
<query>, { $setOnInsert: { <field1>: <value1>, ... } }, { upsert: true } ) $set { $set: { <field1>: <value1>, ... } } $unset 删除指定字段 { $unset: { <field1>: "", ... } } $min 指定值小于当前值则更新为指定值 ...
有关特定操作符(包括事务语法和示例)的详细信息,请单击该操作符的参考页面链接。 兼容性 您可以对以下环境中托管的部署使用查询和投影运算符: MongoDB Atlas:用于云中 MongoDB 部署的完全托管服务 MongoDB Enterprise:基于订阅、自我管理的 MongoDB 版本