Viewing Table Statistics
Function
This statement is used to view the table statistics. The names and data types of all columns in a specified table will be returned.
Syntax
1
|
DESCRIBE [EXTENDED|FORMATTED] [db_name.]table_name; |
Keywords
- EXTENDED: displays all metadata of the specified table. It is used during debugging in general.
- FORMATTED: displays all metadata of the specified table in a form.
Parameters
Parameter |
Description |
---|---|
db_name |
Database name that contains letters, digits, and underscores (_). It cannot contain only digits or start with an underscore (_). |
table_name |
Table name of a database that contains letters, digits, and underscores (_). It cannot contain only digits or start with an underscore (_). The matching rule is ^(?!_)(?![0-9]+$)[A-Za-z0-9_$]*$. If special characters are required, use single quotation marks ('') to enclose them. |
Precautions
The to-be-queried table must exist. If this statement is used to query the information about a table that does not exist, an error is reported.
Example
To query the names and data types of all columns in the student table, run the following statement:
1
|
DESCRIBE student; |
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.
For any further questions, feel free to contact us through the chatbot.
Chatbot