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nvogel

Rating
1509.94 (71,051st) 		Reputation
21,224 (6,313th)
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Title Δ
applying primary key to multiple columns in mysql -0.01
Table with no primary foreign key match 0.00
what is the difference between first normal form and second normal... +0.50
why auto increment id is used as primary key in DATA dictionary ev... +1.67
Why can't I perform an aggregate function on an expression containi... +1.23
Unique key vs Candidate key / Superkey (MySQL) 0.00
6 Primary keys in a database +0.28
Artificial Data normalisation as data is put into the database 0.00
What normalisation form is a restaurant menu? +0.51
Unrelated tables in ERD -0.34
SQL to end users: pros and cons -1.19
sql primary key auto increment -0.48
Data type for database primary key 0.00
How to implement uniqueness where the order of the fields does not... +0.40
AdventureWorks have Insert/Update/Delete anomalies? 0.00
Update table row based on 3 OR conditions +0.90
Are primary keys passé? +2.32
PRIMARY KEYs vs. UNIQUE Constraints -0.78
OLTP Application Reading Data Warehouse Data Design +0.03
SQL foreign key on primary key or unique column -1.29
Composite primary keys or surrogates when dealing with date/time -1.53
Confusion with primary key +1.25
Is there an elegant way to store a dual relationship (i.e. user 1 a... +0.46
Would relational databases scale as well (or better) than their NoS... -0.15
Using National ID as Primary Key -1.02
Difference between 3NF and BCNF in simple terms (must be able to ex... +0.88
Superkey, candidate key & primary key -0.50
Exposing Surrogate Key to Users +0.15
Can a SQL Server database schema always enforce its application's b... +0.26
database functional dependency decomposition +0.02
Database Design: FKs that are NULL - good or bad? +0.02
SQl Design issue. Unique Index/Constraint vs Surrogate Keys -1.43
Set Limit for a Table Rows In SQL +2.45
Good resources for learning tuple calculus? +0.46
Why does an SQL table have multiple primary keys? +1.60
2 primary keys in a table +0.29
Checking for null,empty variable in sql server -1.73
Weak entity in ER design 0.00
Multi Map / Reduce index vs. relational join +0.58
NATURAL JOIN on large tables +0.07
Can all SQL queries be represented in Relational Algebra, Domain an... +0.15
Is it possible to put a constraint on a table whereas a column can'... +0.04
optional foreign keys one of which must be mandatory - how? -1.11
How to present a data model without using ER notation 0.00
How to change composite key column type from varchar to nvarchar? 0.00
Which normal form does this table violate? -0.36
When not to use MySQL or other relational DBs? -0.83
history table and 2nf +0.43
Null Processing in MS SQL Server 2008 -1.26
design - sixth normal form +1.62