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Rating Stats for

Erwin Smout

Rating
1476.14 (4,508,578th) 		Reputation
15,185 (9,267th)
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Title Δ
Unable to decompose this relation to BCNF 0.00
Normalize table to 3rd normal form +0.87
relational algebra queries +0.52
can the natural-join be seen as a subset of the equi-join and theta... -0.23
Relational Algebra Query Troubles -0.41
Relational Algebra querying 0.00
How do I produce functional dependencies and corresponding relation... 0.00
Reference to table without foreign key constraint -0.42
Database Design Questions on Unnecessary Foreign Keys 0.00
Dynamically creating a view 0.00
What is OUTER UNION and why is it partially compatible 0.00
Is this Relational algebra correct? +0.59
SQL - Cause of aborted concurrent transactions 0.00
Do classes in an UML class diagram always translate to entities in... +0.63
Equivalent Relational Algebra statement for a given SQL query 0.00
Can Postgres tables be optimized by the column order? -1.58
Is this relation in BCNF? 0.00
Misconception of what superkey or Boyce Codd Normal form is 0.00
When can an SQL result contain duplicates? +1.13
Best Approach to support dynamic database -0.15
Normalization and Unique Ids +0.59
Correlated Subquery and Joins -0.99
MapReduce in Relational database management system (RDBMS) +0.59
Foreign key with multiple columns from different tables +0.39
What is the ideal MySQL transaction isolation mode for an e-commerc... 0.00
utf-8 vs latin1 -1.14
Why is a specific cardinality not allowed in the ERD? +0.79
Converting a certain SQL query into relational algebra 0.00
Do the "columns" in a table in a RMDB have order? +2.32
Reorder composition of composite primary key -1.25
Why are relational databases having scalability issues? +1.51
Is it possible to have a SQL table within an SQL table? (for dynami... -1.56
RA operator difference - relational algebra +0.07
PostgreSQL design of dependency tree without circular dependencies -1.68
How to best maintain status in a parent-child relationship +0.09
Does natural join distribute over set-difference? +0.56
Why would you not want to consolidate Mission Critical Databases? +0.25
relational algebra natural join -1.00
Did I answer this correctly? 0.00
How to implement this data structure in SQL tables +0.11
Leftover functional dependencies after Boyce Codd decomposition? 0.00
storing data ranges - effective representation -0.63
Practical example of MVD3: (transitivity) If X ↠ Y and Y ↠ Z, then... 0.00
Different Types for the Same Column +0.21
Entity-Relationship diagram +0.52
Function inside selection condition in relational algebra 0.00
What query language abides most closely to Codd's relational model... +0.58
is this relation in third normal form? +1.32
What is the right order of insertion/deletion/modification on datas... +0.83
Non-Numeric Field as PK - Database Design Issue +0.34