Substring between characters in Oracle 9i

Question

In later versions I can use this regexp_substr:

SELECT 
    ID, 
    regexp_substr(ID, \'[^.]+\', 1, 2) DATA 1, 
    regexp_substr(ID, \'[^.]+\', 1,         


        

Answer 1

You don't need regular expressions - just use SUBSTR and INSTR:

SELECT id,
       SUBSTR( id, dot1 + 1, dot2 - dot1 - 1) AS data1,
       SUBSTR( id, dot2 + 1, dot3 - dot2 - 1) AS data2
FROM   (
  SELECT id,
         INSTR( id, '.', 1, 1 ) AS dot1,
         INSTR( id, '.', 1, 2 ) AS dot2,
         INSTR( id, '.', 1, 3 ) AS dot3
  FROM   employees
);