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select * From t_employee2 Where sal in (1500,800,1600)
order by instr(',1500.00,800.00,1600.00,',CONCAT(',',sal,','));
SELECT CONCAT(',',sal,',') From t_employee2;
SELECT DISTINCT instr(',1500.00,800.00,1600.00,',CONCAT(',',sal,',')) From t_employee2;