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Revolucion for Monica's user avatar
Revolucion for Monica's user avatar
Revolucion for Monica's user avatar
Revolucion for Monica
  • Member for 8 years, 4 months
  • Last seen more than 1 year ago
11 votes
1 answer
1k views

How to enter records with keys to an initially empty B+ tree?

5 votes
1 answer
5k views

What would be the maximum number of records that can be indexed with a three levels B-tree ? B+ tree?

5 votes
2 answers
2k views

Creating relationships between tables that where not specified in the given UML diagram

4 votes
1 answer
189 views

Are three equalities on a join operation legal in relational algebra?

4 votes
1 answer
77 views

How much does an ordered query of an attribute costs in terms of operations when the attribute is a key or an attribute?

3 votes
0 answers
87 views

What is a cost of search for records in a table with an equality predicate on a non key attribute A and a static hash organization?

2 votes
1 answer
505 views

When is a multi-attribute index less beneficial?

2 votes
0 answers
68 views

How much does a query of deletion costs in terms of operations when the attribute is a key or an attribute?

2 votes
1 answer
149 views

What a closure `F` of a family of functional dependencies is?

2 votes
3 answers
11k views

how to import a huge csv file into Cassandra?

2 votes
1 answer
5k views

Two tables with the same primary keys

2 votes
2 answers
2k views

Dependency preserving decomposition

2 votes
0 answers
61 views

Decomposition and loss of dependencies

2 votes
1 answer
37 views

Decompostion with loss of information shown by junction

2 votes
1 answer
4k views

MySQLdb._exceptions.OperationalError: (2006, '') when closing a SQL query. Is it because of the connection?

1 vote
1 answer
436 views

Decomposition In Boyce-Codd Normal Form may lose relations?

1 vote
0 answers
1k views

How to create a check between two attributes of two different tables

1 vote
1 answer
37 views

How to sort the id users that have the maximum of a property?

1 vote
1 answer
119 views

how to represent what functional dependencies are?

1 vote
0 answers
175 views

How to express inclusive and exclusive relations in relational algebra and relational calculus?

1 vote
0 answers
649 views

Cartesian product and Division in Relational Algebra

1 vote
1 answer
635 views

Counterexample to demonstrate there are no functional dependencies

1 vote
1 answer
115 views

Applying second and third Normal Form

1 vote
1 answer
642 views

Login failed for user when trying to connect to Azure Postgre database from MSSMS [closed]

1 vote
2 answers
1k views

How to automate the detection of the column type of a csv file for a table creation script?

1 vote
0 answers
329 views

Can't reach my servers on pgAdmin4

1 vote
1 answer
509 views

Creating an Updating trigger

1 vote
2 answers
806 views

How to write double Natural Join in SQL?

0 votes
1 answer
475 views

How to express functional dependency in relational calculus and SQL?

0 votes
1 answer
4k views

"ZooKeeper exists failed after 4 attempts" when launching Hbase