22.4.3.1 创建、列出和删除集合
In MySQL Shell, you can create new collections, get a list of the existing collections in a schema, and remove an existing collection from a schema. Collection names are case-sensitive and each collection name must be unique.
To show the value that is assigned to the schema variable, issue:
mysql-py> db
If the schema value is not Schema:world_x
, then set the db
variable by issuing:
mysql-py> \use world_x
To create a new collection in an existing schema, use the db
object's createCollection()
method. The following example creates a collection called flags
in the world_x
schema.
mysql-py> db.create_collection("flags")
The method returns a collection object.
<Collection:flags>
To display all collections in the world_x
schema, use the db
object's get_collections()
method. Collections returned by the server you are currently connected to appear between brackets.
mysql-py> db.get_collections()
[
<Collection:countryinfo>,
<Collection:flags>
]
To drop an existing collection from a schema, use the db
object's drop_collection()
method. For example, to drop the flags
collection from the current schema, issue:
mysql-py> db.drop_collection("flags")
The drop_collection()
method is also used in MySQL Shell to drop a relational table from a schema.
-
See Collection Objects for more examples.