{"id":6974,"date":"2015-03-25T22:00:53","date_gmt":"2015-03-26T02:00:53","guid":{"rendered":"http:\/\/bangla.salearningschool.com\/?p=6974"},"modified":"2015-03-25T22:02:45","modified_gmt":"2015-03-26T02:02:45","slug":"%e0%a6%ae%e0%a6%82%e0%a6%97%e0%a7%8b%e0%a6%a1%e0%a6%bf%e0%a6%ac%e0%a6%bf-%e0%a6%95%e0%a7%81%e0%a7%9f%e0%a7%87%e0%a6%b0%e0%a6%bf-%e0%a6%a1%e0%a7%8b%e0%a6%95%e0%a7%81%e0%a6%ae%e0%a7%87%e0%a6%a8","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=6974","title":{"rendered":"\u09ae\u0982\u0997\u09cb\u09a1\u09bf\u09ac\u09bf – \u0995\u09c1\u09df\u09c7\u09b0\u09bf \u09a1\u09cb\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f (MongoDB – Query Document)"},"content":{"rendered":"

MongoDB \u0985\u09a8\u09c1\u09b8\u09a8\u09cd\u09a7\u09be\u09a8\u09ae\u09c2\u09b2\u0995 \u09ac\u09be Query \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f<\/p>\n

\u09a8\u09df\u09a8 \u099a\u09a8\u09cd\u09a6\u09cd\u09b0 \u09a6\u09a4\u09cd\u09a4<\/p>\n

 <\/p>\n

 <\/p>\n

find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf<\/p>\n

MongoDB collection \u09a1\u09c7\u099f\u09be \u0985\u09a8\u09c1\u09b8\u09a8\u09cd\u09a7\u09be\u09a8 \u0995\u09b0\u09a4\u09c7 \u0986\u09aa\u09a8\u09be\u0995\u09c7 MongoDB \u098f\u09b0 find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7\u0964<\/p>\n

 <\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983<\/p>\n

find()\u00a0 \u098f\u09b0 \u09ac\u09c7\u09b8\u09bf\u0995 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09ac\u09be \u09ac\u09be\u0995\u09cd\u09af-\u0997\u09a0\u09a8 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b0\u09c2\u09aa\u0983<\/p>\n

 <\/p>\n

>db.COLLECTION_NAME.find()<\/p>\n

 <\/p>\n

find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09b8\u09ac\u0997\u09c1\u09b2\u09cb \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f\u0995\u09c7 \u098f\u0995\u099f\u09bf \u0985-\u0995\u09be\u09a0\u09be\u09ae\u09cb\u0997\u09a4 \u09ad\u09be\u09ac\u09c7 \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 \u0995\u09b0\u09ac\u09c7\u0964<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

pretty() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf<\/p>\n

\u09b8\u09c1\u09ac\u09bf\u09a8\u09cd\u09af\u09b8\u09cd\u09a4\u09ad\u09be\u09ac\u09c7 \u09ab\u09b2\u09be\u09ab\u09b2 \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 \u0995\u09b0\u09be\u09b0 \u099c\u09a8\u09cd\u09af pretty() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u09a8\u0964<\/p>\n

 <\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983<\/p>\n

 <\/p>\n

>db.mycol.find().pretty()<\/p>\n

 <\/p>\n

 <\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3\u0983<\/p>\n

 <\/p>\n

>db.mycol.find().pretty()<\/p>\n

{<\/p>\n

“_id”: ObjectId(7df78ad8902c),<\/p>\n

“title”: “MongoDB Overview”,<\/p>\n

“description”: “MongoDB is no sql database”,<\/p>\n

“by”: “tutorials point”,<\/p>\n

“url”: “http:\/\/www.tutorialspoint.com”,<\/p>\n

“tags”: [“mongodb”, “database”, “NoSQL”],<\/p>\n

“likes”: “100”<\/p>\n

}<\/p>\n

><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u099b\u09be\u09dc\u09be\u0993 \u098f\u0996\u09be\u09a8\u09c7 findOne() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf\u0993 \u0986\u099b\u09c7 \u09af\u09be \u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u098f\u0995\u099f\u09bf \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f\u0995\u09c7 \u09aa\u09c1\u09a8\u09b0\u09be\u09df \u09a7\u09be\u09ac\u09bf\u09a4 \u0995\u09b0\u09c7\u0964<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

MongoDB \u098f\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 RDBMS \u09af\u09c7\u0996\u09be\u09a8\u09c7 Clause \u09ac\u09be \u09a7\u09be\u09b0\u09be \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af<\/p>\n

\u0995\u09bf\u099b\u09c1 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09b0 \u09ad\u09bf\u09a4\u09cd\u09a4\u09bf\u09a4\u09c7 \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u0985\u09a8\u09c1\u09b8\u09a8\u09cd\u09a7\u09be\u09a8 \u0995\u09b0\u09a4\u09c7 \u0986\u09aa\u09a8\u09bf \u09a8\u09bf\u09ae\u09cd\u09a8\u09b2\u09bf\u0996\u09bf\u09a4 \u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u09a8\u0964<\/p>\n

 <\/p>\n

\u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u0983 \u09b8\u09ae\u09a4\u09be<\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 {<key>:<value>}<\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3\u0983 db.mycol.find({“by”:”tutorials point”}).pretty()<\/p>\n

RDBMS \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af\u09a4\u09be\u0983 \u09af\u09c7\u0996\u09be\u09a8\u09c7 by = ‘tutorials point’<\/p>\n

 <\/p>\n

\u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u0983 \u099b\u09cb\u099f<\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 {<key>:{$lt:<value>}}<\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3\u0983 db.mycol.find({“likes”:{$lt:50}}).pretty()<\/p>\n

RDBMS \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af\u09a4\u09be\u0983 \u09af\u09c7\u0996\u09be\u09a8\u09c7 likes < 50<\/p>\n

 <\/p>\n

\u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u0983 \u09b8\u09ae\u09be\u09a8 \u09ac\u09be \u099b\u09cb\u099f<\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 {:{$lte:}}<\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3\u0983 db.mycol.find({“likes”:{$lte:50}}).pretty()<\/p>\n

RDBMS \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af\u09a4\u09be\u0983 \u09af\u09c7\u0996\u09be\u09a8\u09c7 likes <= 50<\/p>\n

 <\/p>\n

\u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u0983 \u09ac\u09dc<\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 {<key>:{$gt:<value>}}<\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3\u0983 db.mycol.find({“likes”:{$gt:50}}).pretty()<\/p>\n

RDBMS \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af\u09a4\u09be\u0983 \u09af\u09c7\u0996\u09be\u09a8\u09c7 likes > 50<\/p>\n

 <\/p>\n

\u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u0983 \u09b8\u09ae\u09be\u09a8 \u09ac\u09be \u09ac\u09dc<\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 {:{$gte:}}<\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3\u0983 db.mycol.find({“likes”:{$gte:50}}).pretty()<\/p>\n

RDBMS \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af\u09a4\u09be\u0983 \u09af\u09c7\u0996\u09be\u09a8\u09c7 likes >= 50<\/p>\n

 <\/p>\n

\u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u0983 \u0985\u09b8\u09ae\u09be\u09a8<\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 {:{$ne:}}<\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3\u0983 db.mycol.find({“likes”:{$ne:50}}).pretty()<\/p>\n

RDBMS \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af\u09a4\u09be\u0983 \u09af\u09c7\u0996\u09be\u09a8\u09c7 likes != 50<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

MongoDB \u09a4\u09c7 AND<\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983<\/p>\n

find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf\u09a4\u09c7 \u09af\u09a6\u09bf \u0986\u09aa\u09a8\u09bf \u098f\u0995\u09be\u09a7\u09bf\u0995 \u0995\u09c0 ( ‘,’ )\u09a6\u09bf\u09df\u09c7 \u09aa\u09c3\u09a5\u0995 \u0995\u09b0\u09c7 \u09aa\u09be\u09b8 \u0995\u09b0\u09c7\u09a8 \u09a4\u09be\u09b9\u09b2\u09c7 MongoDB \u098f\u099f\u09be\u0995\u09c7 AND \u09b6\u09b0\u09cd\u09a4\u09c7\u09b0 \u09a8\u09cd\u09af\u09be\u09df \u0986\u099a\u09b0\u09a8 \u0995\u09b0\u09be\u09df\u0964 AND \u098f\u09b0 \u09ac\u09c7\u09b8\u09bf\u0995 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09ac\u09be \u09ac\u09be\u0995\u09cd\u09af-\u0997\u09a0\u09a8 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b0\u09c2\u09aa\u0983<\/p>\n

 <\/p>\n

>db.mycol.find({key1:value1, key2:value2}).pretty()<\/p>\n

 <\/p>\n

 <\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3<\/p>\n

\u0989\u09b2\u09cd\u09b2\u09bf\u0996\u09bf\u09a4 \u09a8\u09c0\u099a\u09c7\u09b0 \u0989\u09a6\u09be\u09b9\u09b0\u09a3\u099f\u09bf ‘tutorials point’ \u09a6\u09cd\u09ac\u09be\u09b0\u09be \u09b2\u09bf\u0996\u09bf\u09a4 \u09b8\u09ac \u099f\u09bf\u0989\u099f\u09cb\u09b0\u09bf\u09af\u09bc\u09be\u09b2 \u098f\u09ac\u0982 \u09af\u09be\u09b0 \u099f\u09be\u0987\u099f\u09c7\u09b2 ‘MongoDB Overview’\u00a0 \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 \u0995\u09b0\u09ac\u09c7\u0964<\/p>\n

 <\/p>\n

>db.mycol.find({“by”:”tutorials point”,”title”: “MongoDB Overview”}).pretty()<\/p>\n

{<\/p>\n

“_id”: ObjectId(7df78ad8902c),<\/p>\n

“title”: “MongoDB Overview”,<\/p>\n

“description”: “MongoDB is no sql database”,<\/p>\n

“by”: “tutorials point”,<\/p>\n

“url”: “http:\/\/www.tutorialspoint.com”,<\/p>\n

“tags”: [“mongodb”, “database”, “NoSQL”],<\/p>\n

“likes”: “100”<\/p>\n

}<\/p>\n

><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\u0989\u09aa\u09b0\u09c7 \u0989\u09b2\u09cd\u09b2\u09bf\u0996\u09bf\u09a4 \u0989\u09a6\u09be\u09b9\u09b0\u09a3\u099f\u09bf \u09b8\u09ae\u09be\u09a8 \u09b9\u09ac\u09c7 \u09af\u09c7\u0996\u09be\u09a8\u09c7 clause \u099f\u09bf ‘ where by=’tutorials point’ AND title=’MongoDB Overview’\u00a0 \u09b9\u09ac\u09c7\u0964<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

MongoDB \u09a4\u09c7 OR<\/p>\n

\u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983<\/p>\n

OR \u09b6\u09b0\u09cd\u09a4\u09c7\u09b0 \u0989\u09aa\u09b0 \u09ad\u09bf\u09a4\u09cd\u09a4\u09bf \u0995\u09b0\u09c7 \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u0996\u09cb\u099c\u09a4\u09c7 \u0986\u09aa\u09a8\u09be\u0995\u09c7 $or \u0995\u09c0\u0993\u09df\u09be\u09b0\u09cd\u09a1 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7\u0964 OR \u098f\u09b0 \u09ac\u09c7\u09b8\u09bf\u0995 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09ac\u09be \u09ac\u09be\u0995\u09cd\u09af-\u0997\u09a0\u09a8 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b0\u09c2\u09aa\u0983<\/p>\n

 <\/p>\n

>db.mycol.find(<\/p>\n

{<\/p>\n

$or: [<\/p>\n

{key1: value1}, {key2:value2}<\/p>\n

]<\/p>\n

}<\/p>\n

).pretty()<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3<\/p>\n

\u0989\u09b2\u09cd\u09b2\u09bf\u0996\u09bf\u09a4 \u09a8\u09c0\u099a\u09c7\u09b0 \u0989\u09a6\u09be\u09b9\u09b0\u09a3\u099f\u09bf ‘tutorials point’ \u09a6\u09cd\u09ac\u09be\u09b0\u09be \u09b2\u09bf\u0996\u09bf\u09a4 \u09b8\u09ac \u099f\u09bf\u0989\u099f\u09cb\u09b0\u09bf\u09af\u09bc\u09be\u09b2 \u098f\u09ac\u0982 \u09af\u09be\u09b0 \u099f\u09be\u0987\u099f\u09c7\u09b2 ‘MongoDB Overview’\u00a0 \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 \u0995\u09b0\u09ac\u09c7\u0964<\/p>\n

 <\/p>\n

 <\/p>\n

>db.mycol.find({$or:[{“by”:”tutorials point”},{“title”: “MongoDB Overview”}]}).pretty()<\/p>\n

{<\/p>\n

“_id”: ObjectId(7df78ad8902c),<\/p>\n

“title”: “MongoDB Overview”,<\/p>\n

“description”: “MongoDB is no sql database”,<\/p>\n

“by”: “tutorials point”,<\/p>\n

“url”: “http:\/\/www.tutorialspoint.com”,<\/p>\n

“tags”: [“mongodb”, “database”, “NoSQL”],<\/p>\n

“likes”: “100”<\/p>\n

}<\/p>\n

><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\u098f\u0995\u09a4\u09cd\u09b0\u09c7 AND \u098f\u09ac\u0982 OR\u00a0 \u098f\u09b0 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0<\/p>\n

\u0989\u09a6\u09be\u09b9\u09a3\u0983<\/p>\n

\u0989\u09b2\u09cd\u09b2\u09bf\u0996\u09bf\u09a4 \u09a8\u09c0\u099a\u09c7\u09b0 \u0989\u09a6\u09be\u09b9\u09b0\u09a3\u099f\u09bf \u09e7\u09e6\u09e6 \u098f\u09b0 \u099a\u09c7\u09df\u09c7 \u09ac\u09dc \u098f\u09ac\u0982 \u09af\u09be\u09b0 \u099f\u09be\u0987\u099f\u09c7\u09b2 ‘MongoDB Overview’ \u09ac\u09be ‘tutorials point’ \u0964 \u098f\u09b8\u0995\u09bf\u0989\u098f\u09b2 \u09b8\u09ae\u09be\u09a8 \u09b9\u09ac\u09c7 \u09af\u09c7\u0996\u09be\u09a8\u09c7 ‘where likes>10 AND (by = ‘tutorials point’ OR title = ‘MongoDB Overview’)’\u00a0 \u0964 \u09af\u09c7\u09ae\u09a8\u0983-<\/p>\n

 <\/p>\n

>db.mycol.find(“likes”: {$gt:10}, $or: [{“by”: “tutorials point”}, {“title”: “MongoDB Overview”}] }).pretty()<\/p>\n

{<\/p>\n

“_id”: ObjectId(7df78ad8902c),<\/p>\n

“title”: “MongoDB Overview”,<\/p>\n

“description”: “MongoDB is no sql database”,<\/p>\n

“by”: “tutorials point”,<\/p>\n

“url”: “http:\/\/www.tutorialspoint.com”,<\/p>\n

“tags”: [“mongodb”, “database”, “NoSQL”],<\/p>\n

“likes”: “100”<\/p>\n

}<\/p>\n

><\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

http:\/\/Bangla.SaLearningSchool.com<\/p>\n","protected":false},"excerpt":{"rendered":"

MongoDB \u0985\u09a8\u09c1\u09b8\u09a8\u09cd\u09a7\u09be\u09a8\u09ae\u09c2\u09b2\u0995 \u09ac\u09be Query \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u09a8\u09df\u09a8 \u099a\u09a8\u09cd\u09a6\u09cd\u09b0 \u09a6\u09a4\u09cd\u09a4     find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf MongoDB collection \u09a1\u09c7\u099f\u09be \u0985\u09a8\u09c1\u09b8\u09a8\u09cd\u09a7\u09be\u09a8 \u0995\u09b0\u09a4\u09c7 \u0986\u09aa\u09a8\u09be\u0995\u09c7 MongoDB \u098f\u09b0 find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7\u0964   \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 find()\u00a0 \u098f\u09b0 \u09ac\u09c7\u09b8\u09bf\u0995 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09ac\u09be \u09ac\u09be\u0995\u09cd\u09af-\u0997\u09a0\u09a8 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b0\u09c2\u09aa\u0983   >db.COLLECTION_NAME.find()   find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09b8\u09ac\u0997\u09c1\u09b2\u09cb \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f\u0995\u09c7 \u098f\u0995\u099f\u09bf \u0985-\u0995\u09be\u09a0\u09be\u09ae\u09cb\u0997\u09a4 \u09ad\u09be\u09ac\u09c7 \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 \u0995\u09b0\u09ac\u09c7\u0964         pretty() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09b8\u09c1\u09ac\u09bf\u09a8\u09cd\u09af\u09b8\u09cd\u09a4\u09ad\u09be\u09ac\u09c7 \u09ab\u09b2\u09be\u09ab\u09b2 \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 … <\/p>\n

Continue reading<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1,222],"tags":[],"class_list":["post-6974","post","type-post","status-publish","format-standard","hentry","category-root","category-----mongodb-001","item-wrap"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":6987,"url":"http:\/\/bangla.sitestree.com\/?p=6987","url_meta":{"origin":6974,"position":0},"title":"MongoDB Limit Records","author":"Author-Check- Article-or-Video","date":"April 24, 2015","format":false,"excerpt":"MongoDB \u09b8\u09c0\u09ae\u09be\u09ac\u09a6\u09cd\u09a7 \u09b0\u09c7\u0995\u09b0\u09cd\u09a1\u09b8 \u09a8\u09df\u09a8 \u099a\u09a8\u09cd\u09a6\u09cd\u09b0 \u09a6\u09a4\u09cd\u09a4 \u00a0 Limit() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf MongoDB \u09a4\u09c7 \u09b0\u09c7\u0995\u09b0\u09cd\u09a1\u0995\u09c7 \u09b8\u09c0\u09ae\u09be\u09ac\u09a6\u09cd\u09a7 \u0995\u09b0\u09a4\u09c7 \u09b9\u09b2\u09c7 limit() \u09ae\u09c7\u09a5\u09a1 \u09ac\u09be \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7\u0964 Limit() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u098f\u0995 \u09a8\u09be\u09ae\u09cd\u09ac\u09be\u09b0\u09c7\u09b0 \u099f\u09be\u0987\u09aa \u09b8\u09ae\u09b0\u09cd\u09a5\u09a8 \u0995\u09b0\u09c7 \u09af\u09be \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f\u09c7\u09b0 \u09a8\u09be\u09ae\u09cd\u09ac\u09be\u09b0 \u098f\u09ac\u0982 \u0986\u09aa\u09a8\u09bf \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 \u0995\u09b0\u09a4\u09c7 \u099a\u09be\u0987\u099b\u09c7\u09a8\u0964 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 limit() \u098f\u09b0 \u09ac\u09c7\u09b8\u09bf\u0995 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b0\u09c2\u09aa\u0983 >db.COLLECTION_NAME.find().limit(NUMBER) \u0989\u09a6\u09be\u09b9\u09b0\u09a3\u0983 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b2\u09bf\u0996\u09bf\u09a4 \u09a4\u09a5\u09cd\u09af\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 myycol \u0995\u09be\u09b2\u09c7\u0995\u09b6\u09a8\u099f\u09bf\u2026","rel":"","context":"In "Root"","block_context":{"text":"Root","link":"http:\/\/bangla.sitestree.com\/?cat=1"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6993,"url":"http:\/\/bangla.sitestree.com\/?p=6993","url_meta":{"origin":6974,"position":1},"title":"MongoDB Aggregation","author":"Author-Check- Article-or-Video","date":"March 11, 2015","format":false,"excerpt":"MongoDB \u09b8\u09c0\u09ae\u09be\u09ac\u09a6\u09cd\u09a7 \u09b0\u09c7\u0995\u09b0\u09cd\u09a1\u09b8 \u09a8\u09df\u09a8 \u099a\u09a8\u09cd\u09a6\u09cd\u09b0 \u09a6\u09a4\u09cd\u09a4 * Limit() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf MongoDB \u09a4\u09c7 \u09b0\u09c7\u0995\u09b0\u09cd\u09a1\u0995\u09c7 \u09b8\u09c0\u09ae\u09be\u09ac\u09a6\u09cd\u09a7 \u0995\u09b0\u09a4\u09c7 \u09b9\u09b2\u09c7 limit() \u09ae\u09c7\u09a5\u09a1 \u09ac\u09be \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7\u0964 Limit() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u098f\u0995 \u09a8\u09be\u09ae\u09cd\u09ac\u09be\u09b0\u09c7\u09b0 \u099f\u09be\u0987\u09aa \u09b8\u09ae\u09b0\u09cd\u09a5\u09a8 \u0995\u09b0\u09c7 \u09af\u09be \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f\u09c7\u09b0 \u09a8\u09be\u09ae\u09cd\u09ac\u09be\u09b0 \u098f\u09ac\u0982 \u0986\u09aa\u09a8\u09bf \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 \u0995\u09b0\u09a4\u09c7 \u099a\u09be\u0987\u099b\u09c7\u09a8\u0964 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 limit() \u098f\u09b0 \u09ac\u09c7\u09b8\u09bf\u0995 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b0\u09c2\u09aa\u0983 >db.COLLECTION_NAME.find().limit(NUMBER) \u0989\u09a6\u09be\u09b9\u09b0\u09a3\u0983 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b2\u09bf\u0996\u09bf\u09a4 \u09a4\u09a5\u09cd\u09af\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 myycol \u0995\u09be\u09b2\u09c7\u0995\u09b6\u09a8\u099f\u09bf\u2026","rel":"","context":"In "\u09ae\u0999\u09cd\u0997 \u09a1\u09bf \u09ac\u09bf \u0964 MongoDB"","block_context":{"text":"\u09ae\u0999\u09cd\u0997 \u09a1\u09bf \u09ac\u09bf \u0964 MongoDB","link":"http:\/\/bangla.sitestree.com\/?cat=222"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":7295,"url":"http:\/\/bangla.sitestree.com\/?p=7295","url_meta":{"origin":6974,"position":2},"title":"MongoDB \u09b8\u09c0\u09ae\u09be\u09ac\u09a6\u09cd\u09a7 \u09b0\u09c7\u0995\u09b0\u09cd\u09a1\u09b8","author":"Author-Check- Article-or-Video","date":"March 16, 2015","format":false,"excerpt":"MongoDB \u09b8\u09c0\u09ae\u09be\u09ac\u09a6\u09cd\u09a7 \u09b0\u09c7\u0995\u09b0\u09cd\u09a1\u09b8 \u09a8\u09df\u09a8 \u099a\u09a8\u09cd\u09a6\u09cd\u09b0 \u09a6\u09a4\u09cd\u09a4 * Limit() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf MongoDB \u09a4\u09c7 \u09b0\u09c7\u0995\u09b0\u09cd\u09a1\u0995\u09c7 \u09b8\u09c0\u09ae\u09be\u09ac\u09a6\u09cd\u09a7 \u0995\u09b0\u09a4\u09c7 \u09b9\u09b2\u09c7 limit() \u09ae\u09c7\u09a5\u09a1 \u09ac\u09be \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7\u0964 Limit() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u098f\u0995 \u09a8\u09be\u09ae\u09cd\u09ac\u09be\u09b0\u09c7\u09b0 \u099f\u09be\u0987\u09aa \u09b8\u09ae\u09b0\u09cd\u09a5\u09a8 \u0995\u09b0\u09c7 \u09af\u09be \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f\u09c7\u09b0 \u09a8\u09be\u09ae\u09cd\u09ac\u09be\u09b0 \u098f\u09ac\u0982 \u0986\u09aa\u09a8\u09bf \u09aa\u09cd\u09b0\u09a6\u09b0\u09cd\u09b6\u09a8 \u0995\u09b0\u09a4\u09c7 \u099a\u09be\u0987\u099b\u09c7\u09a8\u0964 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8\u0983 limit() \u098f\u09b0 \u09ac\u09c7\u09b8\u09bf\u0995 \u09b8\u09bf\u09a8\u099f\u09cd\u09af\u09be\u0995\u09cd\u09b8 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b0\u09c2\u09aa\u0983 >db.COLLECTION_NAME.find().limit(NUMBER) \u0989\u09a6\u09be\u09b9\u09b0\u09a3\u0983 \u09a8\u09bf\u09ae\u09cd\u09a8\u09b2\u09bf\u0996\u09bf\u09a4 \u09a4\u09a5\u09cd\u09af\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 myycol \u0995\u09be\u09b2\u09c7\u0995\u09b6\u09a8\u099f\u09bf\u2026","rel":"","context":"In "\u09ae\u0999\u09cd\u0997 \u09a1\u09bf \u09ac\u09bf \u0964 MongoDB"","block_context":{"text":"\u09ae\u0999\u09cd\u0997 \u09a1\u09bf \u09ac\u09bf \u0964 MongoDB","link":"http:\/\/bangla.sitestree.com\/?cat=222"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6989,"url":"http:\/\/bangla.sitestree.com\/?p=6989","url_meta":{"origin":6974,"position":3},"title":"MongoDB Sort Documents . MongoDB \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u09ac\u09be\u099b\u09be\u0987","author":"Author-Check- Article-or-Video","date":"March 25, 2015","format":false,"excerpt":"MongoDB \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u09ac\u09be\u099b\u09be\u0987 \u09a8\u09df\u09a8 \u099a\u09a8\u09cd\u09a6\u09cd\u09b0 \u09a6\u09a4\u09cd\u09a4 sort() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf MongoDB \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u09ac\u09be\u099b\u09be\u0987 \u0995\u09b0\u09a4\u09c7 \u09b9\u09b2\u09c7 \u0986\u09aa\u09a8\u09be\u0995\u09c7 sort() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7\u0964 \u0995\u09cd\u09b7\u09c7\u09a4\u09cd\u09b0 \u09a4\u09be\u09b2\u09bf\u0995\u09be \u09a7\u09be\u09b0\u09a3\u0995\u09be\u09b0\u09c0 \u098f\u09ac\u0982 \u09a4\u09be\u09a6\u09c7\u09b0 \u09ac\u09be\u099b\u09be\u0987 \u0995\u09cd\u09b0\u09ae\u09c7\u09b0 \u09b8\u0999\u09cd\u0997\u09c7, sort() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u0997\u09cd\u09b0\u09b9\u09a3 \u0995\u09b0\u09c7\u0964 \u09ac\u09be\u099b\u09be\u0987 \u09aa\u09cd\u09b0\u0995\u09cd\u09b0\u09bf\u09df\u09be \u0989\u09b2\u09cd\u09b2\u09c7\u0996 \u0995\u09b0\u09be\u09b0 \u099c\u09a8\u09cd\u09af 1 \u098f\u09ac\u0982 -1 \u09ac\u09cd\u09af\u09ac\u09b9\u09c3\u09a4 \u09b9\u09df\u0964 1 \u0995\u09cd\u09b0\u09ae \u098a\u09b0\u09cd\u09a7\u09cd\u09ac\u0997\u09be\u09ae\u09c0\u09a4\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09be \u09b9\u09af\u09bc \u09af\u0996\u09a8\u2026","rel":"","context":"In "Root"","block_context":{"text":"Root","link":"http:\/\/bangla.sitestree.com\/?cat=1"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6985,"url":"http:\/\/bangla.sitestree.com\/?p=6985","url_meta":{"origin":6974,"position":4},"title":"MongoDB Projection","author":"Author-Check- Article-or-Video","date":"March 16, 2015","format":false,"excerpt":"MongoDB \u09aa\u09cd\u09b0\u099c\u09c7\u0995\u09b6\u09a8 \u09a8\u09df\u09a8 \u099a\u09a8\u09cd\u09a6\u09cd\u09b0 \u09a6\u09a4\u09cd\u09a4 MongoDB \u09aa\u09cd\u09b0\u099c\u09c7\u0995\u09b6\u09a8 MongoDB \u09aa\u09cd\u09b0\u099c\u09c7\u0995\u09b6\u09a8\u09c7\u09b0 \u0985\u09b0\u09cd\u09a5 \u09b9\u099a\u09cd\u099b\u09c7 \u098f\u0995\u099f\u09bf \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f\u09c7\u09b0 \u09b8\u0995\u09b2 \u09a4\u09a5\u09cd\u09af \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u09a8\u09be \u0995\u09b0\u09c7 \u09ac\u09b0\u0982 \u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc \u09a4\u09a5\u09cd\u09af \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u0995\u09b0\u09be\u0964 \u09af\u09a6\u09bf \u098f\u0995\u099f\u09bf \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f\u09c7\u09b0 \u09eb\u099f\u09bf \u0995\u09cd\u09b7\u09c7\u09a4\u09cd\u09b0 \u09a5\u09be\u0995\u09c7 \u098f\u09ac\u0982 \u0986\u09aa\u09a8\u09be\u09b0 \u09e9\u099f\u09bf \u09a6\u09c7\u0996\u09be\u09a8\u09cb\u09b0 \u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8 \u09b9\u09df \u09a4\u09be\u09b9\u09b2\u09c7 \u098f\u09a6\u09c7\u09b0 \u09ae\u09a7\u09cd\u09af \u09a5\u09c7\u0995\u09c7 \u09b6\u09c1\u09a7\u09c1 \u09e9\u099f\u09bf \u09b8\u09bf\u09b2\u09c7\u0995\u09cd\u099f \u0995\u09b0\u09c1\u09a8\u0964 find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf MongoDB \u098f\u09b0 find() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf\u2026","rel":"","context":"In "\u09ae\u0999\u09cd\u0997 \u09a1\u09bf \u09ac\u09bf \u0964 MongoDB"","block_context":{"text":"\u09ae\u0999\u09cd\u0997 \u09a1\u09bf \u09ac\u09bf \u0964 MongoDB","link":"http:\/\/bangla.sitestree.com\/?cat=222"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6983,"url":"http:\/\/bangla.sitestree.com\/?p=6983","url_meta":{"origin":6974,"position":5},"title":"MongoDB Delete Document . MongoDB \u09a1\u09bf\u09b2\u09bf\u099f \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f","author":"Author-Check- Article-or-Video","date":"March 6, 2015","format":false,"excerpt":"MongoDB \u09a1\u09bf\u09b2\u09bf\u099f \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u09a8\u09df\u09a8 \u099a\u09a8\u09cd\u09a6\u09cd\u09b0 \u09a6\u09a4\u09cd\u09a4 remove() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf MongoDB \u098f\u09b0 remove() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u0995\u09be\u09b2\u09c7\u0995\u09b6\u09a8 \u09a5\u09c7\u0995\u09c7 \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u09a1\u09bf\u09b2\u09bf\u099f \u0995\u09b0\u09a4\u09c7 \u09ac\u09cd\u09af\u09ac\u09b9\u09c3\u09a4 \u09b9\u09df\u0964 \u09a6\u09c1\u099f\u09bf \u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0 \u09ac\u09be\u09a6\u09c7 \u09b8\u09ac\u0995\u09cd\u09b7\u09c7\u09a4\u09cd\u09b0\u09c7 remove() \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u0997\u09cd\u09b0\u09a3\u09af\u09cb\u0997\u09cd\u09af \u09b9\u09df\u0964 \u098f\u0995\u099f\u09bf deletion criteria \u098f\u09ac\u0982 \u0985\u09a8\u09cd\u09af\u099f\u09bf justOne flag \u0964 \u09e7\u0964 deletion criteria: (\u0985\u09aa\u09b6\u09a8\u09be\u09b2) \u09a1\u0995\u09c1\u09ae\u09c7\u09a8\u09cd\u099f \u0985\u09a8\u09c1\u09af\u09be\u09df\u09c0 deletion criteria \u09ae\u09c7\u099b\u09c7 \u09ab\u09c7\u09b2\u09be \u09b9\u09ac\u09c7\u0964 \u09e8\u0964 justOne: \u09af\u09a6\u09bf \u09b8\u09a4\u09cd\u09af\u2026","rel":"","context":"In "\u09ae\u0999\u09cd\u0997 \u09a1\u09bf \u09ac\u09bf \u0964 MongoDB"","block_context":{"text":"\u09ae\u0999\u09cd\u0997 \u09a1\u09bf \u09ac\u09bf \u0964 MongoDB","link":"http:\/\/bangla.sitestree.com\/?cat=222"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/6974","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6974"}],"version-history":[{"count":3,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/6974\/revisions"}],"predecessor-version":[{"id":7496,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/6974\/revisions\/7496"}],"wp:attachment":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6974"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}