몽고db ( mongodb ) 기본명령어 1 - Collection ( 컬렉션 )

출처:http://jmkook77.blogspot.kr/2012/01/db-mongodb-collection.html

Mongodb Collection

 1) 컬렉션 생성

   > use dbName;
   > db.createCollection("test1");

   { "ok" : 1 }

   > show collections;

   system.indexes

   test1

   > # Capped Collection ( 제한사이즈로 설정하며 성능적으로 유리함. 단, 제한사항을 가지므로http://www.mongodb.org/display/DOCS/Capped+Collections#CappedCollections-UsageandRestrictions 에서 확인 필요 ) 

   > db.createCollection("test1", {capped:true, size:100000, max: 1000});

 { "ok" : 1 }

   > show collections;

   system.indexes

   test1

 2) 컬렉션명 수정

   > db.collectionName.renameCollection("newCollectionName");


   { "ok" : 1 }

   > show collections;

   system.indexes

   test2

 3) 컬렉션 삭제

   > db.test2.drop();

   true

   > show collections;

   system.indexes

 4) 컬렉션 상태 보기

   > db.test3.validate();

{

"ns" : "test.test3",

"capped" : 1,

"max" : 2147483647,

"firstExtent" : "0:25000 ns:test.test3",

"lastExtent" : "0:25000 ns:test.test3",

"extentCount" : 1,

"datasize" : 0,

"nrecords" : 0,

"lastExtentSize" : 102400,

"padding" : 1,

"firstExtentDetails" : {

"loc" : "0:25000",

"xnext" : "null",

"xprev" : "null",

"nsdiag" : "test.test3",

"size" : 102400,

"firstRecord" : "null",

"lastRecord" : "null"

},

"deletedCount" : 2,

"deletedSize" : 102224,

"nIndexes" : 0,

"keysPerIndex" : {

},

"valid" : true,

"errors" : [ ],

"warning" : "Some checks omitted for speed. use {full:true} option to do more thorough scan.",

"ok" : 1

}