Assistance replacing oracle (+) joins to ANSI joins - oracle

Question

I've reviewed other posts as well as Oracle documentation on replacing the older style (+) joins with ANSI format joins. I'm having a hard time converting this over to what I assume to be two left outer join operations. My hangup is the two from select statements and where exactly the joins should be placed.
Here is my query:
SELECT
AUP.USERNAME,
AUP.MENU_STRING MODULE,
NVL(UGA.PERMISSION,AUP.DEFAULT_PERMISSION) PERMISSION
FROM
(SELECT
DU.USERNAME,
A.PROGRAM_ID,
A.MENU_STRING,
'Y' DEFAULT_PERMISSION
FROM
APPLICATION A,
DBA_USERS DU
WHERE
A.PROGRAM_ID NOT IN ('.SEPARATOR')
AND DU.USERNAME NOT LIKE '%#') AUP,
(SELECT
USER_ID,
PROGRAM_ID,
PERMISSION
FROM
USER_PGM_AUTHORITY
WHERE
PROGRAM_COMPONENT='PROGRAM') UGA
WHERE
AUP.USERNAME=UGA.USER_ID(+)
AND AUP.PROGRAM_ID=UGA.PROGRAM_ID(+)
AND aup.menu_string = 'Vendor Maintenance'
ORDER BY
AUP.USERNAME,
AUP.MENU_STRING;

Answer 1

I think this will do it:
SELECT
AUP.USERNAME,
AUP.MENU_STRING MODULE,
NVL(UGA.PERMISSION,AUP.DEFAULT_PERMISSION) PERMISSION
FROM
(SELECT
DU.USERNAME,
A.PROGRAM_ID,
A.MENU_STRING,
'Y' DEFAULT_PERMISSION
FROM
APPLICATION A,
DBA_USERS DU
WHERE
A.PROGRAM_ID NOT IN ('.SEPARATOR')
AND DU.USERNAME NOT LIKE '%#') AUP
LEFT JOIN
(SELECT
USER_ID,
PROGRAM_ID,
PERMISSION
FROM
USER_PGM_AUTHORITY
WHERE
PROGRAM_COMPONENT='PROGRAM') UGA
ON
AUP.USERNAME=UGA.USER_ID
AND AUP.PROGRAM_ID=UGA.PROGRAM_ID
WHERE
aup.menu_string = 'Vendor Maintenance'
ORDER BY
AUP.USERNAME,
AUP.MENU_STRING;

Answer 2

The join is between AUPand UGA:
SELECT
AUP.USERNAME,
AUP.MENU_STRING MODULE,
NVL(UGA.PERMISSION,AUP.DEFAULT_PERMISSION) PERMISSION
FROM
(SELECT
DU.USERNAME,
A.PROGRAM_ID,
A.MENU_STRING,
'Y' DEFAULT_PERMISSION
FROM
APPLICATION A,
DBA_USERS DU
WHERE
A.PROGRAM_ID NOT IN ('.SEPARATOR')
AND DU.USERNAME NOT LIKE '%#') AUP
LEFT JOIN
(SELECT
USER_ID,
PROGRAM_ID,
PERMISSION
FROM
USER_PGM_AUTHORITY
WHERE
PROGRAM_COMPONENT='PROGRAM') UGA
ON AUP.USERNAME=UGA.USER_ID
AND AUP.PROGRAM_ID=UGA.PROGRAM_ID
WHERE aup.menu_string = 'Vendor Maintenance'
ORDER BY
AUP.USERNAME,
AUP.MENU_STRING;

Answer 3

You can refactor it using named sub-queries to make it more readable:
WITH AUP AS ( -- Moved to a named sub-query
SELECT
DU.USERNAME,
A.PROGRAM_ID,
A.MENU_STRING,
'Y' DEFAULT_PERMISSION
FROM
APPLICATION A
CROSS JOIN -- No apparent join condition so used an explicit CROSS JOIN.
DBA_USERS DU
WHERE
A.PROGRAM_ID NOT IN ('.SEPARATOR')
AND DU.USERNAME NOT LIKE '%#'
AND A.MENU_STRING = 'Vendor Maintenance' -- Moved to the appropriate sub-query
),
UGA AS ( -- Moved to a named sub-query
SELECT
USER_ID,
PROGRAM_ID,
PERMISSION
FROM
USER_PGM_AUTHORITY
WHERE
PROGRAM_COMPONENT='PROGRAM'
)
SELECT
AUP.USERNAME,
AUP.MENU_STRING MODULE,
NVL(UGA.PERMISSION,AUP.DEFAULT_PERMISSION) PERMISSION
FROM
AUP
LEFT OUTER JOIN
UGA
ON ( AUP.USERNAME =UGA.USER_ID
AND AUP.PROGRAM_ID=UGA.PROGRAM_ID )
ORDER BY
AUP.USERNAME,
AUP.MENU_STRING;

Answer 4

Borrowing this thread from 10 years ago. I've tried to adapt the solution to my query but I can't figure it out.
Here is my query and I want to replace the (+) with LEFT JOIN
FROM a,b,c
WHERE b.a = '101'
AND a.a = '202'
AND b.c = a.c
AND a.d = c.d(+)
AND ROWNUM = 1;