Let the following relational tables be given: R = (A, B, C) and S = (D, E, F) where A, B, C, D, E, and F are the attributes (columns). Write the SQL statements that will express each of the queries given below:
標(biāo)簽：
relational
following
tables
given
上傳時(shí)間：
2014-01-14
上傳用戶(hù)：cx111111
