第五章 MongoDb索引优化 5.6

7.删除索引
a.删除某个表中的所有索引
To delete all indexes on the specified collection:

命令行： db.collection.dropIndexes();

java： coll.dropIndex("rsc");

b.删除某个表中的单一索引
To delete a single index:

db.schedule.dropIndex({rsc:1});

> db.runCommand(db.schedule.dropIndex({rsc:1}));

{

        "errmsg" : "no such cmd",

        "bad cmd" : {

                "nIndexesWas" : 2,

                "ok" : 1

        },

        "ok" : 0

}

延伸阅读:

http://www.mongodb.org/display/DOCS/Indexes#Indexes-DocumentsasKeys

http://www.mongodb.org/display/DOCS/min+and+max+Query+Specifiers

http://www.mongodb.org/display/DOCS/Advanced+Queries