How can Oracle extract numbers from a string?

2 years ago
Sophia Anderson
1 minute

Regular expressions can be used to extract numbers from a string. The specific steps are as follows:

  1. Utilize the REGEXP_SUBSTR function to extract the numerical portion of a string.
  2. Create a regular expression pattern to match numbers.
  3. Pass the string and regular expression as parameters to the REGEXP_SUBSTR function, and specify the position of the desired result (default is 1).
  4. Return the extracted numerical part as the result.

Here is an example code:

SELECT REGEXP_SUBSTR('abc123def456', '[[:digit:]]+') AS result FROM dual;

Executing the above code will return a row of data with the result “123”.

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