select Feld1,Feld2,Feld3 from Tabelle_X where Bedingung1 = '...' and Bedingung2 = '...'
select Feld1,Feld2,Feld3 from Tabelle_X where Bedingung1 = '...' and Bedingung2 = '...'
select Feld1,Feld2,Feld3 from Tabelle_X where Bedingung1 = '...'
select Feld1,Feld2 from Tabelle_Y where Bedingung1 = '...' and Bedingung2 = '...'
select Feld1,Feld2 from Tabelle_Y where Bedingung1 = '...'
select Feld1,Feld2,Feld3 from Tabelle_Z where Bedingung1 = '...' and Bedingung2 = '...'