> For the complete documentation index, see [llms.txt](https://docs.skydeck.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.skydeck.ai/zh-cn/genstudio-workspace/tools/sql-assistant/how-to-use.md).
# 如何使用
要开始使用 SQL Assistant，您需要提供一个数据定义语言（DDL）段和任务描述。
* **DDL** **段** – 一组 SQL 命令、对象、属性和约束的子集，专注于定义或修改数据库对象的结构。
* **任务描述** – 与 DDL 相关的指令，告诉 SQL Assistant 您需要什么帮助。
每当您与 SQL Assistant 创建新聊天时加载的默认占位符提示，展示了如何创建您自己的提示：
* DDL 语句创建了一个名为 ‘transactions’ 的表，包含 5 列（transaction\_id、customer\_id、transaction\_date、amount 和 description）。
* 任务描述要求 SQL Assistant 提供一个查询，打印所有超过 1000 美元的交易。
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