【MongoDB学习笔记7】深入MongoDB的删除（remove/drop）操作
先看集合post中文档信息：1
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> db.post.find();
{ "_id" : ObjectId("54a51cfd7f46906f81b7adcd"), "bar" : "baz" }
{ "_id" : 0 }
{ "_id" : 1 }
{ "_id" : 2 }
{ "_id" : 5, "test1" : 0 }
{ "_id" : 4, "test2" : 2 }
{ "_id" : 3, "test3" : 3 }
{ "_id" : 6, "test5" : 5 }
{ "_id" : 7, "test1" : 1 }
{ "_id" : 8, "test1" : 1 }
删除指定的文档：
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> db.post.remove({"_id":5});
WriteResult({ "nRemoved" : 1 })
> db.post.find();
{ "_id" : ObjectId("54a51cfd7f46906f81b7adcd"), "bar" : "baz" }
{ "_id" : 0 }
{ "_id" : 1 }
{ "_id" : 2 }
{ "_id" : 4, "test2" : 2 }
{ "_id" : 3, "test3" : 3 }
{ "_id" : 6, "test5" : 5 }
{ "_id" : 7, "test1" : 1 }
{ "_id" : 8, "test1" : 1 }
删除所有｛“test1”：1｝的文档：
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> db.post.remove({"test1":1});
WriteResult({ "nRemoved" : 2 })
> db.post.find();
{ "_id" : ObjectId("54a51cfd7f46906f81b7adcd"), "bar" : "baz" }
{ "_id" : 0 }
{ "_id" : 1 }
{ "_id" : 2 }
{ "_id" : 4, "test2" : 2 }
{ "_id" : 3, "test3" : 3 }
{ "_id" : 6, "test5" : 5 }
>
删除整个post集合：
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> db.post.drop()
true
> show collections
system.indexes
>
页:
[1]