mongodb wildcard

First, the index introductionIn MongoDB, indexes are used to support efficient queries. If there is no index, MONGODB must scan each document in the entire collection to find a matching document. However, if an appropriate index is established,

At the beginning of the article, let's review how to open the MongoDB database with the cmd Command window, with the following command:Open the MongoDB databaseCD D:\Program Files\mongodb\binmongod " D:\Program Files\mongodb\data "　See the above

http://www.cnblogs.com/pingfan1990/p/4558630.html ThemesMongoDBLinux such as: Choice/c:dme defrag,mem,end will show defrag , mem,end[d,m,e]?sample:sample.bat are as follows: @echo Offchoice/c:dme defrag,mem,endif errorlevel 3 Goto defrag (should

Index typeMONGDB indexes are divided into the following types: Single-key index, composite index, geospatial Index, full-text index, and hash indexSingle-key index (single Field Indexes)An index created on a key is a single-key index, which is the

#!/bin/sh# # # BEGIN INIT INFO# Provides:mongodb# Required-start:# Required-stop:# Default-start:2 3 4 5# default-stop:0 1 6# Short-description:mongodb# Description:mongo DB Server# # # END INIT INFOExport lc_all= "C". /lib/lsb/init-functionsProgram=

No. 01 Session: Overview of the overall course content-----------------------the MAVEN supplement and git sections below------------------------------------------------------------------No. 02 Session: Maven Supplement: Sub-module, sub-project

No. 01 Session: Overview of the overall course content-----------------------the MAVEN supplement and git sections below------------------------------------------------------------------No. 02 Session: Maven Supplement: Sub-module, sub-project

No. 01 Session: Overview of the overall course content-----------------------the MAVEN supplement and git sections below------------------------------------------------------------------No. 02 Session: Maven Supplement: Sub-module, sub-project

                                     #Mongodb   settingmongo.hostport=127.0.0.1:27017mongo.connectionsperhost= 8mongo.threadsallowedtoblockforconnectionmultiplier=4# Connection Timeout Time mongo.connecttimeout=1000# wait time mongo.maxwaittime= 15

Db.tb1.find ()//query all, use it to view the next page.Db.tb1.find ({"Age": 1})//Check the records of Ages ==1Db.tb1.find ({},{"age": 1})//Check records for ages ==1Db.tb1.find ({"name": {$all: ["A", "B"]}})//query name contains a/b