Oracle string removed.

Oracle is a popular relational database used by many applications to store and manage data. In Oracle, a common requirement is to remove certain characters from a string, such as the "." symbol. This article will introduce how to remove the "." symbol from a string in Oracle to help you process string data.

In Oracle, there are several ways to remove the "." symbol from a string. Here are some simple and easy-to-understand methods:

First method: Use the REPLACE function

The REPLACE function is a widely used string function that can replace specific characters in a string.

The syntax is as follows:

REPLACE (string, old_string, new_string)

Among them, string represents the string that needs to be replaced, old_string represents the old character that needs to be replaced, and new_string represents the need The new character to replace.

If you want to use this function to remove the "." symbol in a string, you can write like this:

SELECT REPLACE('192.168.1.1', '.', '') FROM dual;

In this example, the string we pass to the REPLACE function is "192.168.1.1", the old character is ".", and the new character is a space. Therefore, after executing this statement, the string "19216811" will be returned.

Second method: Use the REGEXP_REPLACE function

The REGEXP_REPLACE function is a regular expression function that can use regular expressions to replace specific characters in a string.

The syntax is as follows:

REGEXP_REPLACE (string, pattern, replace_with)

Among them, string represents the string that needs to be replaced, pattern represents the pattern that needs to be replaced, and replace_with represents that it needs to be replaced. new characters.

If you want to use this function to remove the "." symbol in a string, you can write like this:

SELECT REGEXP_REPLACE('192.168.1.1', '.', '') FROM dual;

In this example, the string we pass to the REGEXP_REPLACE function is "192.168.1.1", the pattern is ".", and the new character that needs to be replaced is a space. Therefore, after executing this statement, the string "19216811" will be returned.

Third method: Use the TRANSLATE function

The TRANSLATE function is a very efficient string function that can translate characters in a string.

The syntax is as follows:

TRANSLATE (string, old_chars, new_chars)

Among them, string represents the string that needs to be translated, old_chars represents the old characters that need to be translated, and new_chars represents the need Translated new characters.

If you want to use this function to remove the "." symbol in a string, you can write like this:

SELECT TRANSLATE('192.168.1.1', '.', '') FROM dual;

In this example, the string we pass to the TRANSLATE function is "192.168.1.1", the old character is ".", and the new character is a space. Therefore, after executing this statement, the string "19216811" will be returned.

It should be noted that the above three methods are all valid, and you can choose which method to use according to the specific situation.

Conclusion

To remove the "." symbol from a string in Oracle, you can use the REPLACE function, REGEXP_REPLACE function or TRANSLATE function. These functions are very efficient and can be selected according to your needs. Hopefully this article will help you get better at handling string data.

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