That's example is to put the figure 2 in figure 1 will also use of three kinds of technology, find out program as shown in figure 3,
My question is:
The SELECT skill
The FROM Skills
EXCEPT,
The SELECT skill
The FROM EmpSkills ES2

Difference set in this passage, with figure 1 skill column number minus figure 2 3 skill broomrape of 14 number, what is the result that come out, I should be much less understood, then show the remaining part, this little lose more, this is what, guidance,