with dupl as (
select row_number() over(partition by col1,col2,col3,col4,col5,col6 order by id) rn,
id,col1,col2,col3,col4,col5,col6
from myTable
)
delete dupl where rn>1
with dupl as (
select row_number() over(partition by col1,col2,col3,col4,col5,col6 order by id) rn,
id,col1,col2,col3,col4,col5,col6
from myTable
)
delete dupl where rn>1
wildcard SQL Server
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