Abap query with constante value

hello,

I wish to create several abap query since tables MKPF and MSEG for the inventory mouvements. each query for a type of inventory turnover (101, 501,…), but I should not put the code movement in criteria of selection. it is necessary that the code movement should be fixed in the query. should-I declare the MSEG-BWART as a constante? where I can do it?

thank you for your assistance.

cordialy Said