Recent questions tagged rdbms

2 votes
0 answers
31
what is the concept of nested loop join in database?????????link plz or give any example.
0 votes
1 answer
32
0 votes
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33
Number of tables required and also the attribute set of the tables
0 votes
1 answer
35
what does this line means - Let r and s be two relations over the relation schemes R and S respectively and R has attribute A.
5 votes
1 answer
37
How many minimum relations required for the above ER diagram?According to me it should be 7. Please let me know the answer according to you.
0 votes
1 answer
40
Why B or B+ tree is prefer for database indexing rather than AVL tree ????
0 votes
0 answers
41
R(ABCDE) { A,BC,CD} are candidate key of relation R after 1 NF design which one is possible multi valued attributes before 1 NF design ???
4 votes
1 answer
42
What is difference between attributes set of cross product and attributes set of joine ???
1 votes
1 answer
43
What is basic difference between mandatory attributes and multivalued attributes???
0 votes
0 answers
44
For what type of relationships we can't have participant constraints? I mean from unary, binary and ternary relationship is there any that we can't specify a participatio...
1 votes
2 answers
46
Any Good Resource to study this topic ? Or Could anyone explain this topic to me ?
1 votes
1 answer
47
How can trainer id be p.key of Parts??
0 votes
1 answer
49
4 votes
1 answer
51
In RDBMS, the constraint that no key attribute (column) may be NULL is referred to as:Referential integrityMulti-valued dependencyEntity integrityFunctional dependency
3 votes
2 answers
54
Which type of DBMS provides support for maintaining several versions of the same entity?Relational Database Management SystemHierarchicalObject Oriented Database Manageme...
6 votes
4 answers
55
A view of database that appears to an application program is known asSchemaSubschemaVirtual tableNone of these