Register

MadeEasy Test Series: Databases - Joins

• edited by
639 views

1 Answer

0 0 votes

OPTION A

if R is a relation  and it decomposed into two relation R1 and R2.

  • if relation is lossy then R1JOIN R2$\supset$ R.
  • if relation is lossless then R1 JOIN R2=R.

so R1 JOIN R2  $\supseteq$ R

Voting & Accepting an answer helps improve the community
← Previous · DPDA NPDA DCFL CFLNext → · Probabilty
← Previous in category · Doubt Reg ER Model C...Next in category → · Ace Test Series: Dat...
Position:
Show:

Related questions

0 0 votes
1 1 answer
1.1k
1.1k views
Abhisek Tiwari 4 asked Dec 19, 2018
1,059 views
MadeEasy Test Series: Databases - Joins
Table T1 4000 record and 50 disk block Table T2 300 record 20 block has joined with specific condition, No index is available if nested loop join with most appropriate t...
2 2 votes
0 0 answers
913
913 views
Shubham Kumar Gupta asked Jan 18, 2018
913 views
MadeEasy Test Series 2018: Databases - joins
How to solve this?
0 0 votes
0 0 answers
1.1k
1.1k views
vaishali jhalani asked Feb 2, 2017
1,102 views
MadeEasy Subject Test: Databases - Joins
0 0 votes
0 0 answers
420
420 views
Kai asked Jan 24, 2017
420 views
MadeEasy Subject Test: Databases - Joins
Maximum no. of possible records in the result of the following expression is?