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create table tbl (
id_carrier int, id_ref int, enable int, delete int
);
insert into tbl values(99,99,1,1), (100,99,1,1), (101,99,1,1), (102,99,1,0);
select * from tbl
where id_ref = 99 and delete = 0
order by id_carrier desc
limit 1;
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