如何在 MongoDB shell 中列出所有集合？
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How can I list all collections in the MongoDB shell?
提问by coffee-grinder
In the MongoDB shell, how do I list all collections for the current database that I'm using?
在 MongoDB shell 中，如何列出我正在使用的当前数据库的所有集合？
回答by AdaTheDev
You can do...
你可以做...
JavaScript (shell):
JavaScript（外壳）：
db.getCollectionNames()
Node.js:
节点.js：
db.listCollections()
Non-JavaScript (shell only):
非 JavaScript（仅限 shell）：
show collections
The reason I call that non-JavaScript is because:
我称之为非 JavaScript 的原因是：
$ mongo prodmongo/app --eval "show collections"
MongoDB shell version: 3.2.10
connecting to: prodmongo/app
2016-10-26T19:34:34.886-0400 E QUERY [thread1] SyntaxError: missing ; before statement @(shell eval):1:5
$ mongo prodmongo/app --eval "db.getCollectionNames()"
MongoDB shell version: 3.2.10
connecting to: prodmongo/app
[
"Profiles",
"Unit_Info"
]
If you really want that sweet, sweet show collectionsoutput, you can:
如果你真的想要那种甜蜜、甜蜜的show collections输出，你可以：
$ mongo prodmongo/app --eval "db.getCollectionNames().join('\n')"
MongoDB shell version: 3.2.10
connecting to: prodmongo/app
Profiles
Unit_Info
回答by Cameron
> show collections
will list all the collections in the currently selected DB, as stated in the command line help (help).
将列出当前选定数据库中的所有集合，如命令行帮助 ( help) 中所述。
回答by Bharadwaja Bapatla
How do I list all collections for the current database that I'm using?
如何列出我正在使用的当前数据库的所有集合？
Three methods
三种方法
show collectionsshow tablesdb.getCollectionNames()
show collectionsshow tablesdb.getCollectionNames()
To list all databases:
列出所有数据库：
show dbs
To enter or use a given database:
要输入或使用给定的数据库：
use databasename
To list all collections:
列出所有集合：
show collections
Output:
输出：
collection1 collection2 system.indexes
collection1 collection2 system.indexes
(or)
（或者）
show tables
Output:
输出：
collection1 collection2 system.indexes
collection1 collection2 system.indexes
(or)
（或者）
db.getCollectionNames()
Output:
输出：
[ "collection1", "collection2", "system.indexes" ]
[ "collection1", "collection2", "system.indexes" ]
To enter or use given collection
进入或使用给定的集合
use collectionname
回答by Kevin Meredith
> show tables
> show tables
It gives the same result as Cameron's answer.
它给出了与卡梅伦的回答相同的结果。
回答by Salvador Dali
Apart from the options suggested by other people:
除了其他人建议的选项：
show collections // Output every collection
show tables
db.getCollectionNames() // Shows all collections as a list
There is also another way which can be really handy if you want to know how each of the collections was created (for example, it is a capped collection with a particular size):
如果您想知道每个集合是如何创建的（例如，它是一个具有特定大小的有上限的集合），还有另一种非常方便的方法：
db.system.namespaces.find()
回答by Tarun Gupta
First you need to use a database to show all collection/tables inside it.
首先，您需要使用数据库来显示其中的所有集合/表。
>show dbs
users 0.56787GB
test (empty)
>db.test.help() // this will give you all the function which can be used with this db
>use users
>show tables //will show all the collection in the db
回答by lxg
You can use show tablesor show collections.
您可以使用show tables或show collections。
回答by Indrajeet Singh
Try:
尝试：
help // To show all help methods
show dbs // To show all dbs
use dbname // To select your db
show collections // To show all collections in selected db
回答by kkk
The command used for displaying all the collections in the MongoDB database is
用于显示 MongoDB 数据库中所有集合的命令是
show collections
Before running the show collectionscommand you have to select the database:
在运行show collections命令之前，您必须选择数据库：
use mydb // mydb is the name of the database being selected
To see all the databases, you can use the command
要查看所有数据库，可以使用命令
show dbs // Shows all the database names present
For more information, visit see Getting Started.
有关更多信息，请参阅入门。
回答by Engr. Hasanuzzaman Sumon
If you want to show all collections from the MongoDB shell (command line), use the shell helper,
如果要显示来自 MongoDB shell（命令行）的所有集合，请使用 shell helper，
show collections
that shows all collections for the current database. If you want to get all collection lists from your application then you can use the MongoDB database method
显示当前数据库的所有集合。如果要从应用程序中获取所有集合列表，则可以使用 MongoDB 数据库方法
db.getCollectionNames()
For more information about the MongoDB shell helper, you can see mongoShell Quick Reference.
有关 MongoDB shell helper 的更多信息，您可以查看mongoShell Quick Reference。
