Write SQL Query to get Expected Output

Question

i'm trying to get this expected output but its not getting for me... this is my sql query i don't understand how to get only Those ID whose belongs to 100000006

select * from friendlist 
         where userid = '100000006' or frienduserid='100000006' and frndstatuid='4'

Answer 1

select * from friendlist 
         where (userid = '100000006' or frienduserid='100000006') and frndstatuid='4'

Answer 2

SELECT DISTINCT userid
FROM friendlist
WHERE frienduserid='100000006' AND frndstatuid='4'
UNION ALL
SELECT DISTINCT frienduserid
FROM friendlist
WHERE userid='100000006' AND frndstatuid='4'