Comparing list of values against table

Question

I tried to find solution for this problem for some time but without success so any help would be much appreciated. List of IDs needs to be compared against a table and find

Answer 1

You can transform a variable into a query using CONNECT BY (tested on 11g, should work on 10g+):

SQL> WITH DATA AS (SELECT '100,200,300' txt FROM dual)
  2  SELECT regexp_substr(txt, '[^,]+', 1, LEVEL) item FROM DATA
  3  CONNECT BY LEVEL <= length(txt) - length(REPLACE(txt, ',', '')) + 1;

ITEM
--------------------------------------------
100
200
300

You can then join this result to the table as if it were a standard view:

SQL> WITH DATA AS (SELECT '100,200,300' txt FROM dual)
  2  SELECT v.id, dbt.value01
  3    FROM dbt
  4    RIGHT JOIN
  5      (SELECT to_number(regexp_substr(txt, '[^,]+', 1, LEVEL)) ID
  6         FROM DATA
  7       CONNECT BY LEVEL <= length(txt) - length(REPLACE(txt, ',', '')) + 1) v
  8       ON dbt.id = v.id;

        ID VALUE01
---------- ----------
       100 Ann
       300 John
       200