我目前有3张table，供人们预订某些设备。这是我的表格:tblEquipment:idnamedescription1CameraTakespictures2ProjectorProjectspictures3LaptopPortableComputertblEvents:idstartendfirst_namelast_nameemail12009-08-102009-08-11JohnDoejd@email.com22009-08-152009-08-16JaneDoejd@email.comtblEventData:ideventIDequipmentID111212现在，用户