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nvogel

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Title Δ
When a primary key is considered to be a natural key and when it is... 0.00
What is the new primary key when we apply natural join on two tables? 0.00
why this table is not in 1st normal form -0.68
Product / invoice database structure, what if product is updated? 0.00
Does SQLXML breaks 1NF? +2.20
Does a relation(table) without a primary key qualify as a proper re... 0.00
What is the difference between a primary key and a surrogate key? -0.53
ORDER BY subquery and ROWNUM goes against relational philosophy? +2.71
How to scale for national database? -2.08
Functional Dependencies and Primary Keys +0.54
Finding N Largest elements in a column -1.41
Is it good to use id of object from a third-party server as my PK a... -0.47
Should I make a foreign key that can be null or make a new table? +0.11
Two Composite Primary Key in SQL 0.00
Identifying Keys in Database 0.00
Relational Model represent relationship with total disjoint entity 0.00
Why is it necessary to indicate identifying or non-identifying rela... 0.00
Can partial key be duplicated +1.67
Can I avoid a relation loop in my database design? 0.00
Normalization issues 0.00
3rd Normal form Confusion 0.00
Is it ok to have a primary key relate to another primary key? +0.10
Why choose an relational DB over a NoSQL one? +0.00
How to Prove a Subquery is Necessary? 0.00
Is it possible to get rid of the so-called 'Spurious Tuples'... +2.02
Can one apply the augmentation rule in functional dependency in rev... 0.00
is primary key (a,b) different from primary key (b,a)? -1.28
Normalization in OLAP and OLTP -2.28
Identifying and Non-Identifying relationships from programming pers... 0.00
sql required n:m relation -1.95
Difference between non-prime and non-key attributes in Database 0.00
Weak entity vs subclass, what is the difference? +1.75
Is it possible to implement a TRUE one-to-one relation? -0.13
Minimum number of candidate keys for a relation? -0.77
Understanding database normalization. How is the given table 3NF? 0.00
is it possible to have a relationship between entity attributes? 0.00
Is there any reason to avoid using bigint for a surrogate primary k... +2.13
Database Design - functional dependency methodology 0.00
Is there any difference between these two ER designs? 0.00
Theoretical basis for CRUD Operations on data +1.32
Handling Database History for Banking Accounts 0.00
Which normal form does the ER Diagram guarantee? +1.36
Why does SQL standard allow duplicate rows? +0.95
Handling missing values in a database schema? -0.25
Surrogate Keys complicate insertion? 0.00
SQLite : Choose the right record to link when auto increment primar... -0.50
How to tell what Normal Form my tables are in +0.03
Database : what design to point on two possibilities? +1.19
Generating SQL from an ERD - how are relations mapped into SQL? 0.00
What's the difference between fourth and fifth normal form? +0.51