How to trim characters from a string in Oracle

问题

I have a value like "RWCE RU Regional" in an attribute and I need only first four characters I.e the output should be "RWCE"

回答1:

Use subtring function.

SUBSTR('RWCE RU Regional',1,4) should do.

来源：https://stackoverflow.com/questions/27873934/how-to-trim-characters-from-a-string-in-oracle