MySQL - unkown column?

[Rat32]

function nadajemypojazd(plr, cmd) 
pojazd = getPedOccupiedVehicle(plr) 
vehid = getVehicleID(pojazd) 
a,b,c = getElementPosition(pojazd) 
exports.DB2:zapytanie("INSERT INTO bl_test SET marka=vehid,x=a, y=b, z=c") 
end 
addCommandHandler("taktak", nadajemypojazd) 

DS 3:

dbPoll failed; Unkown Column 'vehid' in 'field list'

Columns are created, mysql database working. What's the problem?

[Anubhav]

  
function nadajemypojazd(plr, cmd) 
pojazd = getPedOccupiedVehicle(plr) 
vehid = getVehicleID(pojazd) 
a,b,c = getElementPosition(pojazd) 
exports.DB2:zapytanie("INSERT INTO bl_test SET marka=?,x=?, y=?, z=?", vehid, a, b, c ) 
end 
addCommandHandler("taktak", nadajemypojazd)