I have table :
number city1 city2 mentions
1 a b 5
1 b a 5
1 c d 2
1 d c 2
what I need is to remove duplicate records, such as a, b equal to b,a became :
number city1 city2 mentions
1 a b 5
1 c d 2
any clue for me ?
thanks before :)
I have table :
number city1 city2 mentions
1 a b 5
1 b a 5
1 c d 2
1 d c 2
what I need is to remove duplicate records, such as a, b equal to b,a became :
number city1 city2 mentions
1 a b 5
1 c d 2
any clue for me ?
thanks before :)
Like this?
delete from table t1
where exists (
select *
from table t2
where
t2.number = t1.number and
t2.city1 = t1.city2 and
t2.city2 = t1.city1 and
t2.mentions = t1.mentions and
t2.city1 < t2.city2
)