Question: If the channels is WXYZRSTUVPQ, what is the horizontal order?
SQL: SELECT "Horizontal order" FROM "1-233830-1" WHERE "Channels" = 'WXYZRSTUVPQ';

Question: If the height order is 1 and the soundfield type is mixed-order, what are all the channels?
SQL: SELECT "Channels" FROM "1-233830-1" WHERE "Soundfield type" = 'mixed-order' AND "Height order" = 1.0;

Question: If the channels is WXYZUV, what is the number of channels?
SQL: SELECT "Number of channels" FROM "1-233830-1" WHERE "Channels" = 'WXYZUV';