Checking for the exististence of entries in the IN list

Question

DB Version: 10gR2
create table x
(col1 varchar2(30));
insert into x values ('SONY');
insert into x values ('ALSTHOM');
insert into x values ('AERO');
insert into x values ('JAKE');
insert into x values ('MAINE');
  select col1 from x
    where col1 in
    ('SONY',
     'ALSTHOM',
     'HAITI',
     'MAINE',
     'GHANA'
COL1
SONY
ALSTHOM
MAINEWhenever an entry in the IN list of the query is absent in the table, how can i get the result like
COL1
SONY
ALSTHOM
MAINE
HAITI   -----> NOT PRESENT
GHANA   -----> NOT PRESENT

Answer 1

Something like this? All employees, marking those not in the list
SQL> WITH mylist as (
  2     SELECT 'ANAND' item FROM DUAL UNION ALL
  3     SELECT 'SVEN' FROM DUAL UNION ALL
  4     SELECT 'GORAN' FROM DUAL UNION ALL
  5     SELECT 'CHARLES' FROM DUAL UNION ALL
  6     SELECT 'LEMAR' FROM DUAL UNION ALL
  7     SELECT 'ZIPAJ' FROM DUAL UNION ALL
  8     SELECT 'KRALJIC' FROM DUAL UNION ALL
  9     SELECT 'YING' FROM dual)
10  SELECT empname, DECODE(item, empname, NULL, 'Not in List')
11  FROM employees
12     LEFT JOIN mylist
13        ON empname = item;
EMPNAME                        DECODE(ITEM
ANAND
CHARLES
ZIPAJ
KRALJIC
YING
JAKE                           Not in List
ALSTHOM                        Not in List
AERO                           Not in List
KRUPP                          Not in List
YANEK                          Not in List
MAINE                          Not in List
SONY                           Not in ListOr all list marking entries not in employees:
SQL> WITH mylist as (
  2     SELECT 'ANAND' item FROM DUAL UNION ALL
  3     SELECT 'SVEN' FROM DUAL UNION ALL
  4     SELECT 'GORAN' FROM DUAL UNION ALL
  5     SELECT 'CHARLES' FROM DUAL UNION ALL
  6     SELECT 'LEMAR' FROM DUAL UNION ALL
  7     SELECT 'ZIPAJ' FROM DUAL UNION ALL
  8     SELECT 'KRALJIC' FROM DUAL UNION ALL
  9     SELECT 'YING' FROM dual)
10  SELECT item, DECODE(empname, item, NULL, 'Not in Table')
11  FROM mylist
12     LEFT JOIN employees
13        ON empname = item;
ITEM    DECODE(EMPNA
CHARLES
YING
ZIPAJ
ANAND
KRALJIC
GORAN   Not in Table
SVEN    Not in Table
LEMAR   Not in TableIf your list is longer, and you are getting it programatically somwhere, it might be worthwhile to populate a global temporary table with the list and use that in place of the sub-query factoring clause.
John