ABAP - How To Find Which Field Is Used In Which table.

this can be done by using the transaction code SE15.

1) go to the transaction code se15
2) Select ABAP Dictionary
3) in this Select fields folder
4) then Click on table fields
5) Then you can enter the desired field name ( for example matnr )
6) Run OR press F8.

Here you will get a list containing the field and table name with where it is used .

or this can be done by using where used list .

1) go to transactin Code SE11( ABAP Dictionary)
2) enter the Data table name where-in the respective field (MATNR ) is used eg; MARA
3) Click the where -used list button
4) Check out the box(DB tables) Only .