Question
Which operation is NOT part of relational
algebra?Solution
Update is SQL DML, not relational algebra.
Pipes 'X' and 'Y' together can fill a tank in 30 minutes, while Pipe 'X' alone can fill the tank in 50 minutes. Another pipe 'Z' can empty the fully fil...
Pipe Y is 25% less efficient than pipe X. Together, pipes X and Y can fill a tank in 15 minutes. Pipe Z alone can empty the tank ...
Pipe A fills a tank in 10 hr, Pipe B in 15 hr, and Pipe C empties in 30 hr. All open together. Time to fill?
Β There are 16 taps which are fitted in a tank .In which some are inlet pipes and some are Outlet pipes .Each inlet tap has the efficiency to fill the ...
There are 4 inlet and (y-3) outlet pipes attached to a tank. Each inlet pipe takes 30 hours to fill the tank, and each outlet pipe empties the fully fil...
Pipes βAβ and βBβ can fill a tank in 6 hours and 9 hours, respectively. If pipe βCβ is opened along with pipes βAβ and βBβ, then the...
- There are two inlet pipes 'M', 'N' and one outlet pipe 'O' in a tank. βMβ and βNβ can fill the tank in 12 minutes and 6 minutes respectively. βOοΏ½...
Tap A can fill a tank in 15 hours. Tap B can fill 20% part of the same tank in 4 hours, whereas Tap C can alone empty a tank in βxβ hours. 2/5 part ...
Two pipes A and B can fill a tank in (x+4) hours and (x+8) hours, respectively. Both pipes are opened together, and after 4 hours, pipe A is closed. Pip...
- Pipe A alone and pipe C alone can fill the empty tank in 50% less time and 25% less time respectively than the time taken by pipe B to empty the full tank....
