DESCRIBE DATABASE

描述数据库。例如，显示数据库中的架构。

DESCRIBE 可以缩写为 DESC。

另请参阅：

ALTER DATABASE、CREATE DATABASE、DROP DATABASE、SHOW DATABASES、UNDROP DATABASE

DATABASES 视图 (Information Schema)

语法

DESC[RIBE] DATABASE <database_name>
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参数

database_name

指定要描述的数据库的 :doc:` 标识符 </sql-reference/identifiers>`。

使用说明

  • To post-process the output of this command, you can use the pipe operator (->>) or the RESULT_SCAN function. Both constructs treat the output as a result set that you can query.

    For example, you can use the pipe operator or RESULT_SCAN function to select specific columns from the SHOW command output or filter the rows.

    When you refer to the output columns, use double-quoted identifiers for the column names. For example, to select the output column type, specify SELECT "type".

    You must use double-quoted identifiers because the output column names for SHOW commands are in lowercase. The double quotes ensure that the column names in the SELECT list or WHERE clause match the column names in the SHOW command output that was scanned.

示例

此示例演示了 DESCRIBE DATABASE 命令：

CREATE DATABASE desc_demo;

CREATE SCHEMA sample_schema_1;

CREATE SCHEMA sample_schema_2;

DESCRIBE DATABASE desc_demo;
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+-------------------------------+--------------------+--------+
| created_on                    | name               | kind   |
|-------------------------------+--------------------+--------|
| 2022-06-23 00:00:00.000 -0700 | INFORMATION_SCHEMA | SCHEMA |
| 2022-06-23 00:00:00.000 -0700 | PUBLIC             | SCHEMA |
| 2022-06-23 01:00:00.000 -0700 | SAMPLE_SCHEMA_1    | SCHEMA |
| 2022-06-23 02:00:00.000 -0700 | SAMPLE_SCHEMA_2    | SCHEMA |
+-------------------------------+--------------------+--------+
语言: 中文