multiple tables with single common column id

[brad thurston]

Hello all, obviously a sql noob here. I am trying to learn sql and have a question about my first database and tables within. Currently my db contains 4 tables; tools, materials, personelreq, and references . Each table starts off with a common column "WP' which corresponds to the workpacket number. The tables have up to 50 columns a piece and approx 4k rows. First off, im not even sure if this is the correct/proper way to design such a database.

Can someone relate some insight on this design and issues i may encounter. Most queries would be to gather the tools,materials,personel,and or references associated with a particualar work packet.