Su, Xiaomeng 76a5b1ee83 dli_sqlreference_20240227

Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>

2024-03-27 22:02:33 +00:00

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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

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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

**Table 1** 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:

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DESCRIBE student;

Parent topic: Viewing Tables

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