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The date format for data records in MongoDB is"DateCreated":isodate ("2011-12-20t07:22:50.836z")After flipping through the MongoDB section of the PHP website, it's important to use the following key statements to manipulate the dates in MongoDB:$start = new Mongodate (Strtotime ('-1 day '));$end = new Mongodate (time ());$resultObject =$db->user->find ("dateCreated" = = Array (' $gt ' = = $start, ' $lte ' + $end) ))；"NOTE: SELECT * from users WHERE ag

　　　　Syntax: Db.collectionName.findOne ({condition},{field:true/false})　　　　　　　　3.Pretty () method: Format The document that displays the query　　　　The conditional operators ("$and", "$nor", "$not", "$or", "$exists", "$mod", "$regex", "$where", "$slice ", "$elemMatch", "null query", "$all", "$size", "$in", "$nin")1. The following is a list of conditional operators, meaning, syntax, and comparison with relational databases Equals {} db.col.find({"by":"zgw"}) where by = ‘

age = 22The code is as follows: Db.userInfo.find ({"Age": 22});Equivalent to: SELECT * from userInfo where age = 22;4. Check the records of age > 22The code is as follows: Db.userInfo.find ({age: {$gt: 22}});Equivalent to: SELECT * from UserInfo where >22;5. Check the records of age The code is as follows: Db.userInfo.find ({age: {$lt: 22}});Equivalent to: SELECT * from UserInfo where 6. Check the records of age >= 25The code is as follows: Db.userInfo.find ({age: {$gte: 25}});Equivalent to: SE

What is mcptt MCPTT new global Standard, which would replace legacy group communication systems, such as VHF, TETRA, P25, IDEN and others . Key-advatage is this MCPTT is based on Lte-architecture and would be available for both, goverments/public safety as well a S commercial users. This Market-approach drives costs down due to economies of the scale. Sharing network-infrastructure with commercial users ensure adequate capacity for emergency situati

where 6. Check the records of age >= 25Db.userInfo.find ({age: {$gte: 25}});Equivalent to: SELECT * from UserInfo where age >= 25;7. Check the records of age Db.userInfo.find ({age: {$lte: 25}});8. Query age >= 23 and age Db.userInfo.find ({age: {$gte: $lte: 26}});9. Query the data containing MONGO in nameDb.userInfo.find ({name:/mongo/});Equal to percentSELECT * from UserInfo where name is like '%mongo% '

: Type the IT command cannot take ";" However, you can set the size of the data displayed on each page, using Dbquery.shellbatchsize = 50, so that 50 records per page are displayed. 2. Duplicate data for a column in the current clustered collection after the query is removed Db.userInfo.distinct ("name"); Will filter out the same data in name Equivalent: Select Distict name from UserInfo; 3. Check the record of age = 22 Db.userInfo.find ({"Age": 22}); Equivalent to: SELECT * from userInfo wher

current clustered collection after the query is removed[SQL] View plain copyDb.userInfo.distinct ("name");Will filter out the same data in nameEquivalent: Select Distict name from UserInfo; 3. Check the record of age = 22[SQL] View plain copyDb.userInfo.find ({"Age": 22});Equivalent to: SELECT * from userInfo where age = 22; 4. Check the records of age > 22[SQL] View plain copyDb.userInfo.find ({age: {$gt: 22}});Equivalent to: SELECT * from UserInfo where >22; 5. Check the records of age [SQL]

$lt less than$lte smaller than or equal to$GT > greater than greater than$gte >= greanter than and equal greater than or equal to$ne! = Not equal rangeThe simple usage is as follows:Demand:Users less than 30 are queried:Db. user. Find ({age:{$lt:}},{_id:0});Requirements: 18-25-year-old users are queriedDb. user. Find ({age:{$gte:$lte:)});Note: Here is a feature that is for the age of the key to query, can b

dbquery.shellbatchsize= 50, which shows 50 records per page. 2. Duplicate data for a column in the current clustered collection after the query is removedDb.userInfo.distinct ("name");Will filter out the same data in nameEquivalent: Select Distict name from UserInfo; 3. Check the record of age = 22Db.userInfo.find ({"Age": 22});Equivalent to: SELECT * from userInfo where age = 22; 4. Check the records of age > 22Db.userInfo.find ({age: {$gt: 22}});Equivalent to: SELECT * from UserInfo where >22

big chess?The most familiar strangers play an important role in the coreBringing in the core seems to make many of the masses of consumers can not touch the mind. After all, with Qualcomm, MediaTek and other familiar processor manufacturers compared to the core, whether in popularity, technology accumulation, shipments, etc. are far inferior. In the past, the United Core technology is not known because it has been focused on TD-SCDMA and TD-LTE techn

refer to the usual Css/js browser select load if LTE IE 8]> if gt IE 8]>if LTE IE 8]> so I wrote this (ie's unfriendly support for PNG images) LTE IE 8]> if gt IE 8]>Simple HTML compatibility (refer to JS and CSS for general notation)

Regarding the replacement of avago (Anhua Gaoke), triquint, EPCOS (TDK), and other models, fabrlte RSFP2501B is used on Band 41, adopting FBAR process; insertion loss is lower than 2.5dB; inhibition of WIFI band (CH1-CH10) is higher than 35dB .; the encapsulation is CSP; the specification is 2.0mm * 1.6mm * 0.85mm; RSFP2301F is used for Band 40 and adopts FBAR technology. The insertion loss is lower than 1.8dB, And the PCS and WIFI band are lower than 35dB .; the encapsulation is CSP; the speci

When China's 3G construction is in full swing, some people begin to think about the next step of 3G to discuss the direction of 4G or even 5g. This is also a good topic, but it is obviously too early to be put on the agenda. The 4G standard is still under discussion, and the topic of 5g is even more false. Not long ago, at the IEEE Communications Association's Boston branch, analysts analyzed and studied 3G and 4G, and also believed that 5G may be unnecessary or even impossible. Some representa

, the system architecture of TD-SCDMA also began to develop towards full IP and flat structure. At the same time, Nokia Siemens communication is ready for the evolution of TD-SCDMA to LTE technology, and will combine the best local R D partners and teams through global integrated product solutions, fully support the evolution of TD-SCDMA to LTE technology. At present, Nokia Siemens communication has a comp

According to foreign media reports, the company plans to shut down its 2G network in 2017 due to the impact of ATT Mobility's redistribution of 2G network spectrum and deployment of more advanced services. The US telecom operator is now re-deploying its 1900 MHz PCS spectrum in New York City to switch Global Mobile Communication System services to HSPA + and LTE services. The company disclosed in a file submitted to the Securities and Exchange Commis

1. Metro access 1. High-speed access requirements Bandwidth acceleration is a significant feature of the rapid development of modern information society. From the operator's perspective, the demand for Household broadband acceleration, the emergence of IPTV operations, the construction of 2G/3G and LTE base stations and core networks, the expansion of business outlets and OSS systems, all of them propose IP, broadband, and comprehensive access require

5G wireless technology overview, 5G Wireless Technology For 5G networks in 2018, two of the five most important wireless technologies-multi-input multi-output (MIMO) and beamforming-have always been important for 5G networks. MIMO and beam For LTE/4G, the industry is approaching the theoretical limit of time and frequency utilization. The next step of 5G wireless technology is to use the spatial dimension to send strictly focused signals to different

1. Conditional Comment Control　　! 　　 [if! IE] "not" operatorLt [if Lt IE 6] is less thanLTE [If LTE IE 6] is less than or equal toGT [If GT IE 6] greater thanGTE [if GTE IE 6] greater than or equal to() [If (LTE IE 6)] for sub-expressions, with Boolean operators [if (LTE IE 9) (GT IE 6)] and operator| [If (GT IE6) | (! IE)] or operator　　such as:* Can only be re

Carbon::now ()->modify (' +15 days '); 2016-10-30 14:00:01echo Carbon::now ()->modify ('-2 days '); 2016-10-13 14:00:01 Date comparison In Carbon you can use the following methods to compare dates: min– returns the minimum date. max– returns the maximum date. eq– determines whether the two dates are equal. gt– determines whether the first date is larger than the second date. lt– determines whether the first date is smaller than the second date. gte– determines whether the f

of the traditional network, the GSM (Global System for Mobile Communications)/UMTS (Universal Mobile Telecommunications System) the bearer network, IPv4 network and traditional data center evolve to the LTE (Long Term Evolution)/LTE-A (LTE-Advanced) bearer network, IPv6 network and data center. The Software Defined Network (SDN) technology is used to create an o