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nvogel

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1509.94 (71,051st) 		Reputation
21,224 (6,313th)
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Title Δ
Database semantic modeling and UML? -1.17
Are my tables normalized with 2NF? +0.49
Can a table have multiple Primary keys? +0.26
Referential integrity over table portion +1.37
Thoughts on using email addresses as primary key -1.23
Allow null in unique column -1.68
Can a candidate key be implied by other attributes? +0.08
I dont get DB normalization - isn't repeating FKs also repeating? +0.56
SQL: What is a value? 0.00
Relational Algebra for Cartesian product without duplicates 0.00
Add Unique Key For Nullable Columns - SQL Server -1.23
Represent Is"Something" Data in SQL-Server -0.90
1:x relationships instead of 1:n relationships 0.00
Does the foreign keys automatically get updated as primary table is... +1.31
How to check for 3NF? -0.00
can two primary keys be refer to the same attribute in another table +0.00
Determine on time between 1 to 0 transitions +0.15
Do graph databases deprecate relational databases? -0.68
Normalisation to 3NF, does the foreign key have to be dependent on... 0.00
primary key and clustered index -0.21
What happens when we theta join or cross 2 relations with common at... 0.00
Referential Integrity (Inserting Data to two or more tables) -0.07
Is there a transitive dependency in the following functional depend... +0.23
What are the benefits of finding a natural primary key +1.12
Make a composite key "bidirectional" +0.04
DBMS All keys combined confusion 0.00
Third Normal Form -- transitive dependence between two foreign keys? +2.35
Obtain referential integrity at the expense of 2NF- is it a reasona... +1.67
How to set up primary key, auto increment, and indexes in row versi... 0.00
What is the role of DW in a NoSql world? +1.23
Relational Algebra - Natural join - few basics -2.32
Aggregate Function - First nvarchar in custom order -0.84
Why should zipcode values not be placed in Boyce Codd Normal Form? +1.18
Confused about the third normal form +0.01
Trying to get a third normal form +2.53
ProductID vs barcode in database +2.14
About database keys 0.00
Is this actually a one-to-many relationship? +0.52
functional dependencies of a table having independent attributes -1.83
Using two Id's is good idea? +0.01
Primary key or regular field in database for deleting a row? -0.93
Unique Constraint column can only contain one NULL value -1.28
How do we treat a column that has the same value across ALL records... +1.18
Slowly changing dimension - What is Pure type 6 implementation 0.00
Mapping a 1:1 relationship on a relational schema -0.49
Compound key/ Composite Key / Concatenated Key / Aggregate Key / Ca... 0.00
DB: advantages of relations -1.34
Should I just store email when its being used as username? -0.15
4-Dimensional database grid -1.07
Functional and Multivalued Dependencies in a table 0.00