What is the function that intercepts from right to left in Oracle?

Oracle's LTRIM function is used to truncate all whitespace characters from the right side of a string, including spaces, tabs, newlines, and carriage returns. It returns the trimmed string, or the original string if the string does not contain whitespace.

LTRIM function

The function used in Oracle to intercept a string from right to left is LTRIM.

Syntax:

<code>LTRIM(string)</code>

Parameters:

• string: The string expression to be intercepted.

Function:

The LTRIM function intercepts all whitespace characters (spaces, tabs, line feeds and carriage returns) from the right side of the string, and returns the trimmed string. If the string does not contain any whitespace characters, the function returns the original string.

Example:

<code>SELECT LTRIM('  Hello World   ') FROM dual;

结果：
------
Hello World</code>

In this example, the LTRIM function truncates all spaces from the right side of the string and returns the trimmed string "Hello World".

Other notes:

• The LTRIM function cannot intercept blank characters from the left side of the string. To intercept from the left side, you can use the RTRIM function.
• The LTRIM function returns NULL for NULL values.
• LTRIM function does not change the original string.

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