Oracle SQL Plus：使用SUBSTR和INSTR提取‘-’与‘#’间文本

AI 小北

2026-5-19

Here’s a clear, practical breakdown of how to format content using Markdown per your requirements:

Headings: Use number signs (#) at the start of a line—more signs mean smaller heading levels:
```
# Level 1 Heading (Biggest)
## Level 2 Heading
### Level 3 Heading
```

Unordered List Items: Start each line with a dash (-); indent with spaces for nested items:

- First main list item
- Second main list item
  - Nested sub-item
  - Another nested sub-item

Emphasized Text: Wrap text with single asterisks (*) for italicized emphasis:
```
*This text will show up italicized*
```

Code/Commands: Surround snippets or terminal commands with backticks (`):

To install a package, run `npm install package-name`

For multi-line code blocks, use three backticks:

```javascript
function greet(name) {
    return `Hello, ${name}!`;
}

Quoted Text: Prepend lines with a greater-than sign (>) for blockquotes:

> This is a block of quoted text.
> You can extend it across multiple lines by adding `>` to each line

Links: Wrap link text in square brackets ([]), then add the target URL in parentheses (()):
```
[Read more about Markdown basics](https://example.com)
```
Images: Start with an exclamation mark (!), followed by alt text in brackets and the image URL in parentheses:
```
![A placeholder image](https://example.com/image.png)
```