I've been wanting a new dining table for several years. I have a couple inexpensive 5 foot long by 3 foot tables that I put together and they worked but are not what I wanted. I finally took a lot of my free time in January and built what I want. The base is construction lumber stained black with black ink and covered with polyurethane. The straight pieces are 2x4s and the curved were cut from 2x12s. The top is 6 10 foot long cherry boards. I bought 4 fourths material but it was a bit thicker than that and I got 7/8 planned thickness. I deliberatedly left a little sap wood on the boards partially because removing it entirely would have required at least one more board and partially because this is not what I would call a real fancy table. Pretty simple.
The joints in the bases are 12mm dominos. The curved pieces are also fastened to the uprights with dominos. I think I used 20 in each end. The curved pieces to uprights are just 48mm long and the ends/curved pieces to the horizontal are almost 4 inches long. I "jointed" the boards for the top with my track saw. Worked well.
The chairs are left over from the other tables. I will probably make some out of cherry although I might buy some.