Searching exact match.

Question

Hello all,
How to perform exact match using CONTAINS?
For Eg. to fetch all rows having some exact text like "2003 and 2006" how to do with Contains? I know we can do this with Like operator (Like '%2003 and 2006%') but how to do it with Contains operator?
I tried
1. Contains(field, '{2003 and 2006}',1)>0
2. Contains(field, '"2003 and 2006"',1)>0
3. Contains(field, '%2003 and 2006%',1)>0
Nothing worked. BTW i am using 10g.
Thanks

Answer 1

If you do not specify a stoplist, then Oracle uses the default stoplist. You can specify empty_stoplist when creating your index or provide your own stoplist. You can find the stopwords by selecting from ctx_stopwords. The stopwords are also listed in the online documentaiton. The example below uses an empty stoplist.
SCOTT@orcl_11g> CREATE TABLE your_table
  2    (field VARCHAR2 (60))
  3  /
Table created.
SCOTT@orcl_11g> begin
  2    insert INTO your_table VALUES ('again the');
  3    insert INTO your_table VALUES ('again and the');
  4    insert INTO your_table VALUES ('again');
  5    insert INTO your_table VALUES ('again something here the');
  6  end;
  7  /
PL/SQL procedure successfully completed.
SCOTT@orcl_11g> CREATE INDEX your_index ON your_table (field)
  2  INDEXTYPE IS CTXSYS.CONTEXT
  3  parameters
  4    ('sync        (on commit)
  5        stoplist  ctxsys.empty_stoplist')
  6  /
Index created.
SCOTT@orcl_11g> SELECT * FROM your_table
  2  WHERE CONTAINS (field, '{again and the}', 1) > 0
  3  /
FIELD
again and the
SCOTT@orcl_11g>