In Oracle, I want to know if a string value is numeric only. How can I do this?

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To test a string for numeric characters, you could use a combination of the length function, trim function, and translate function built into Oracle.

You can use the following command:

LENGTH(TRIM(TRANSLATE(string1, ' +-.0123456789', ' ')))
string1 is the string value that you are testing

This function will return a null value if string1 is numeric. It will return a value "greater than 0" if string1 contains any non-numeric characters.

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