SQL Sting Split into Single Column

Question

Very new to SQL but I require some help with something that I am sure is a simple fix.

I have a single column of data within a table called \'Produce\' where types of fr

Answer 1

This can be done with pure SQL, no user written functions needed.

SQL Server

WITH
    fruittable
    AS
        (   SELECT 'Apple' fruit, 1 id
         UNION ALL
            SELECT 'Banana,Apple', 2
         UNION ALL
            SELECT 'Tomato,Grapefruit,Apple', 3
         UNION ALL
            SELECT 'Watermelon,Persimmons', 4
          ),
    split (fruit, id, leftover)
    AS
        (SELECT case when len(fruit) = 0 or fruit is null then null else left(fruit + ',',  charindex(',',fruit + ',') -1 ) end AS fruit
              , id
              , case when len(fruit) = 0 or fruit is null then null else right(fruit + ',', len(fruit) - charindex(',',fruit + ',') + 1) end as leftover
           FROM fruittable
         UNION ALL
         SELECT case when len(leftover) = 0 or leftover is null then null else left(leftover,  charindex(',',leftover) - 1) end AS fruit
              , id
              , case when len(leftover) = 0 or leftover is null then null else substring(leftover,  charindex(',',leftover) + 1, len(leftover)) end as leftover
           FROM split
          WHERE fruit IS NOT NULL)
SELECT fruit, id
  FROM split where fruit is not null
  order by fruit, id;

Oracle

WITH
    fruittable
    AS
        (SELECT 'Apple' fruit, 1 id
           FROM DUAL
         UNION ALL
         SELECT 'Banana,Apple', 2
           FROM DUAL
         UNION ALL
         SELECT 'Tomato,Grapefruit,Apple', 3
           FROM DUAL
         UNION ALL
         SELECT 'Watermelon,Persimmons', 4
           FROM DUAL),
    split (fruit, id, leftover)
    AS
        (SELECT SUBSTR (fruit || ',', 1, INSTR (fruit || ',', ',') - 1) AS fruit
              , id
              , SUBSTR (fruit || ',', INSTR (fruit || ',', ',') + 1) AS leftover
           FROM fruittable
         UNION ALL
         SELECT SUBSTR (leftover, 1, INSTR (leftover, ',') - 1) AS fruit
              , id
              , SUBSTR (leftover, INSTR (leftover, ',') + 1) AS leftover
           FROM split
          WHERE fruit IS NOT NULL)
  SELECT fruit, id
    FROM split
   WHERE fruit IS NOT NULL
ORDER BY fruit, id