@@ -30,7 +30,7 @@ db // 打印当前数据库
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use <database_name>
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					use <database_name>
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```
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					```
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### 显示收藏
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					### 显示集合
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```mongodb
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					```mongodb
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show collections
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					show collections
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@@ -50,7 +50,7 @@ CRUD
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```mongodb
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					```mongodb
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db.coll.insertOne({ name: "Max" })
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					db.coll.insertOne({ name: "Max" })
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db.coll.insert([{ name: "Max"}, {name:"Alex"}]) // 订购批量插入
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					db.coll.insert([{ name: "Max"}, {name:"Alex"}]) // 批量插入
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db.coll.insert([{ name: "Max"}, {name:"Alex"}], {ordered: false}) // 无序批量插入
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					db.coll.insert([{ name: "Max"}, {name:"Alex"}], {ordered: false}) // 无序批量插入
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db.coll.insert({ date: ISODate()})
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					db.coll.insert({ date: ISODate()})
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db.coll.insert({ name: "Max"}, {"writeConcern": {"w": "majority", "wtimeout": 5000}})
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					db.coll.insert({ name: "Max"}, {"writeConcern": {"w": "majority", "wtimeout": 5000}})
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@@ -70,7 +70,7 @@ Commands | Description
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Operator | Description | Commands
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					Operator | Description | Commands
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:-- | --- | ---
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					:-- | --- | ---
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`$gt`  | 比...更棒 | `db.docx.find({class:{$gt:'T'}`
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					`$gt`  | 大于 | `db.docx.find({class:{$gt:'T'}`
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`$gte`  | 大于等于 | `db.docx.find({class:{$gt:'T'}`
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					`$gte`  | 大于等于 | `db.docx.find({class:{$gt:'T'}`
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`$lt`  | 小于 | `db.docx.find({class:{$lt:'T'}`
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					`$lt`  | 小于 | `db.docx.find({class:{$lt:'T'}`
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`$lte` | 小于等于 | `db.docx.find({class:{$lte:'T'}`
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					`$lte` | 小于等于 | `db.docx.find({class:{$lte:'T'}`
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