---
title: "DESCRIBE - OceanBase 数据库 V4.2.2 | OceanBase 文档中心"
description: "DESCRIBE 描述 该语句用于获取表或列的 Schema 信息。 EXPLAIN 与 DESCRIBE 、 DESC 互为同义词。 语法 {EXPLAIN | DESCRIBE | DESC} table_name [column_name | wild]; 参数解释 参数 描述 table_name 指定表名。…"
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---
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# DESCRIBE

更新时间：2026-04-10 11:58:36

[编辑](https://github.com/oceanbase/oceanbase-doc/edit/V4.2.2/zh-CN/700.reference/500.sql-reference/100.sql-syntax/200.common-tenant-of-mysql-mode/600.sql-statement-of-mysql-mode/3300.describe-of-mysql-mode.md)  

## 描述

该语句用于获取表或列的 Schema 信息。

`EXPLAIN` 与 `DESCRIBE`、`DESC` 互为同义词。

## 语法

```sql
{EXPLAIN | DESCRIBE | DESC} table_name [column_name | wild];

```

## 参数解释

| **参数** | 描述 |
| --- | --- |
| table_name | 指定表名。 |
| column_name | 指定表的列名。 |

## 示例

- 展示表 `t1` 的定义。

  ```sql
  obclient> DESCRIBE t1;
  +-------+-------------+------+-----+---------+-------+
  | Field | Type        | Null | Key | Default | Extra |
  +-------+-------------+------+-----+---------+-------+
  | c1    | int(11)     | NO   | PRI | NULL    |       |
  | c2    | int(11)     | YES  |     | NULL    |       |
  | c3    | varchar(20) | YES  |     | NULL    |       |
  +-------+-------------+------+-----+---------+-------+
  3 rows in set

  ```
 - 展示表 `t1` 的 `c1` 列定义。

  ```sql
  obclient> DESCRIBE t1 c1;
  +-------+---------+------+-----+---------+-------+
  | Field | Type    | Null | Key | Default | Extra |
  +-------+---------+------+-----+---------+-------+
  | c1    | int(11) | NO   | PRI | NULL    |       |
  +-------+---------+------+-----+---------+-------+
  1 row in set

  ```

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