REGEXP_SUBSTR extends the functionality of the SUBSTR function by letting you search a string for a regular expression pattern.

Is it possible to order by a substring in a returned field?<BR>I've got a query which returns at most probably around 10 or so ...

I have a column of data with values resembling this: HL7_Result_for_Message_ID_123Q324343.hl7 I need to grab that ID number (in ...