Using 'OR' between column using 'NEAR' and 'ACCUM'

Question

I am newbie to the Oracle Full text searching. After going thru documentation and forum posting in here now I am able to create so Oracle Full Text index on table and was able to write some queries as well. While implementing the findings in my research I had to question about the different of the queries listed below.
Please some one could look at this post and let me know if this correct or not.
CREATE TABLE tbl_application (
app_id VARCHAR(80),
app_title VARCHAR(80),
app_desc VARCHAR(120),
last_update_user VARCHAR(10)
begin
     CTX_DDL.CREATE_PREFERENCE ('tbl_datastore', 'MULTI_COLUMN_DATASTORE');
     CTX_DDL.SET_ATTRIBUTE ('tbl_datastore', 'COLUMNS', 'app_id, app_title, app_desc');
     ctx_ddl.create_section_group ('tbl_section_group' , 'basic_section_group' );
     ctx_ddl.add_field_section ('tbl_section_group' , 'app_id', 'app_id');
     ctx_ddl.add_field_section ('tbl_section_group' , 'app_title', 'app_title');
     ctx_ddl.add_field_section ('tbl_section_group' , 'app_desc', 'app_desc');     
end;
create index tbl_index on tbl_application (last_update_user) indextype is ctxsys.context parameters ('datastore tbl_datastore section group tbl_section_group SYNC (ON COMMIT)' );
so after creating the above mentioned table and the index, I have the following two version of the queries. When I compared the performance between these two queries is more or less same thing. Do you see any other issues using one over other version of these queries.
SELECT app_id, app_title, app_desc,
SCORE (1) AS weighted_score
FROM tbl_application
WHERE
CONTAINS (last_update_user, '
(((knowledge NEAR contains) WITHIN app_id) OR ((knowledge ACCUM contains) WITHIN app_id)) * 10 OR
(((knowledge NEAR contains) WITHIN app_title) OR ((knowledge ACCUM contains) WITHIN app_title)) * 5 OR
(((KNOWLEDGE NEAR contains) WITHIN app_desc) OR ((knowledge ACCUM contains) WITHIN app_desc))', 1) > 0
ORDER BY SCORE (1) DESC;
SELECT app_id, app_title, app_desc,
SCORE (1) AS weighted_score
FROM tbl_application
WHERE
CONTAINS (last_update_user, '
(((knowledge NEAR contains) OR (knowledge ACCUM contains)) WITHIN app_id) * 10 OR
(((knowledge NEAR contains) OR (knowledge ACCUM contains)) WITHIN app_title) * 5 OR
(((KNOWLEDGE NEAR contains) OR (knowledge ACCUM contains)) WITHIN app_desc)', 1) > 0
ORDER BY SCORE (1) DESC;
Thanks
Rakesh

Answer 1

Use OR function in DAX :
=CALCULATE(COUNTROWS(Employees),FILTER(Employees,OR(ISBLANK(Employees[Last Date]),Employees[Last Date]>DATEVALUE("2014-01-01"))))
which is equal to
=CALCULATE(COUNTROWS(Employees),FILTER(Employees,ISBLANK(Employees[Last Date])||Employees[Last Date]>DATEVALUE("2014-01-01")))