User Daniel Valland

8 votes

1 answer

10k views

Should i use subquery to limit table before a join?

asked Apr 1, 2017 at 22:02

7 votes

4 answers

85k views

MYSQL Subquery in columns of select statement

asked Mar 30, 2017 at 17:37

5 votes

3 answers

5k views

Primary key in resulting relation from union operation in relational algebra

asked Oct 3, 2015 at 22:40

3 votes

1 answer

98 views

How are databases able to process queries in parallel while still retaining correct order?

asked Aug 20, 2015 at 7:41

2 votes

1 answer

82 views

Associative property inside functional dependancy

asked Sep 16, 2015 at 15:09

2 votes

2 answers

26k views

What does the Union sign in EER diagrams mean?

asked Nov 30, 2015 at 21:04

2 votes

2 answers

7k views

Does a composite primary key break the first normal form?

asked Nov 29, 2015 at 20:00

1 vote

1 answer

2k views

Mongodb what is the cost of array queries?

asked Dec 30, 2018 at 18:02

0 votes

1 answer

1k views

How to find functional dependancies from simply looking at a relational schema?

asked Nov 29, 2015 at 20:53

0 votes

1 answer

1k views

Attributes in relation after cross product

asked Oct 4, 2015 at 13:32

0 votes

1 answer

164 views

Select all from A where attribute exists in B [closed]

asked Oct 4, 2015 at 23:11

Stack Exchange Network

11 Questions

Should i use subquery to limit table before a join?

MYSQL Subquery in columns of select statement

Primary key in resulting relation from union operation in relational algebra

How are databases able to process queries in parallel while still retaining correct order?

Associative property inside functional dependancy

What does the Union sign in EER diagrams mean?

Does a composite primary key break the first normal form?

Mongodb what is the cost of array queries?

How to find functional dependancies from simply looking at a relational schema?

Attributes in relation after cross product

Select all from A where attribute exists in B [closed]