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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 = (select id_ref from tbl where id_carrier = 99 limit 1) and delete = 0 order by id_carrier desc limit 1; select tbl.* from tbl join (select id_ref from tbl where id_carrier = 99 limit 1) ref on ref.id_ref = tbl.id_ref where delete = 0 order by id_carrier desc limit 1;
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