How to deal with oracle escape characters

Escape characters in Oracle are used to indicate special characters or control sequences, including line connections, string delimiters, line breaks, carriage return, tabs, and backspace characters. Escape character processing usually involves escaping special characters in a string, using | to concatenate multiline strings, and using a backslash to escape the escape character itself.

Oracle escape character processing

In Oracle, escape characters are used to indicate the meaning of a special character or control sequence. Commonly used escape characters are as follows:

**Escape characters	use**
\		Line connection
'	String delimiter
"	String delimiter (double quotes)
`	String delimiter (accent notes)
\n	Line breaks
\r	Carriage return symbol
\t	Tab symbols
\b	Backspace symbol
\	Backslash

Handle escape characters

The following are common ways to handle escaped characters in Oracle:

• Escape special characters in strings: Use escape characters in strings to escape the special meaning of special characters. For example, to use single quotes as part of a string, you can use escape characters\" as follows:

 <code class="oracle">SELECT 'He said, "Hello".' FROM dual;</code>

• Concatenate multi-line strings: Use escape characters | You can concatenate multi-line strings into one line. For example, the following statement concatenates two strings into one line:

 <code class="oracle">SELECT 'This is a ' || 'multi-line string.' FROM dual;</code>

• Escape character with backslash: If you need to use the escape character itself in a string, you need to use a backslash\ to escape it. For example, the following statement uses escape characters\ in a string:

 <code class="oracle">SELECT 'This is a string with an escape character: \.' FROM dual;</code>

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