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philipxy

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1512.61 (54,505th) 		Reputation
11,699 (12,666th)
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Title Δ
Relational algebra with several joins 0.00
retrieve correct data from my schemas 0.00
Is this a one to many or many to many relationship? +0.01
how to Project all columns in relational algebra 0.00
Entity Relationship Diagram - Multiplicities 0.00
MS Access - Outer Join ON condition not behaving 0.00
Views in relational calculus 0.00
How would one structure a mutual relationship between two users in... +0.52
Multiple relationship between tables how to select the correct one... 0.00
Relational database design - "cyclic" graphs 0.00
Mapping ER model to Relational model used primary key twice 0.00
How to design table with primary key and multivalued attribute? +0.08
Converting a relation into 3NF -1.60
Confusion over BCNF +0.46
Is the decomposition reversible for relational databases 0.00
Can a 2NF database already be in 3NF? +2.21
relationship between database tables not sharing any foreign key(s)... -0.64
Multiple relationships to the same entity 0.00
Modeling multiple many to many relationships between the same entit... -0.25
Is Crate a relational DB? +0.02
Functional Dependencies examples 0.00
RStudio 3.3.1 = creating new column using data within a df where it... 0.00
Is my database and framework understanding wrong? +0.04
What is the best solution to set keys in this SQL table representin... +0.42
Can ne table's primary key act as a foreign key in sql? +0.03
Relational Schema of a Specialization {Mandatory, OR} when child en... 0.00
Trivial join dependency 0.00
Database design for banks 0.00
How to join section table with ERDigram -0.29
FULL OUTER JOIN unexpected results +0.30
Normalizing a simple SQL Table -0.21
How can I make a schedule table for instructor from tables created 0.00
Is this SQL query equivalent to this relational algebra statement? +0.01
Database Design. Many to Many.What should be Primary Key? +0.07
Populate many-to-many person-color table using three tables in MySQL +1.62
What to do with null values when modeling and normalizing? +0.37
Can a table have a surrogate key without a (natural) alternate key? -1.05
Does redundant data in different tables break against 3NF Normaliza... 0.00
Circular Dependencies in 3NF 0.00
SQL - Is the time complexity for foreign keys O(1)? 0.00
Rails 5 Active Record Associations 0.00
Decomposition into ABC & CDE and preserving functional dependen... 0.00
Is this BCNF convertion correct? 0.00
Normalization in database management system 0.00
SQL: Returning a list of all the classes that 2 specific students a... 0.00
What level of normalization is this relation +0.48
MySQL foreign key constraints through more tables 0.00
Storing "redundant" foreign keys to avoid joins 0.00
Database Design with products, attributes and prices +1.90
How to define relationships between tables from differnt sources? -0.23