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philipxy

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1512.61 (54,505th) 		Reputation
11,699 (12,666th)
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Title Δ
Difference between Relational Algebra and Relational calculus +0.50
How to provide relational algebra for the given schema? +0.51
Entity and Relationship Set +0.52
JOIN Query with COUNT and WHERE in MySQL +0.01
Skipping steps in Normalization? 0.00
What does while(!a) mean when a is a number? -0.76
Time series database design - merging historical and forecast data 0.00
How to Interpret These Examples According to Fuctional Dependency i... -0.23
Pivoting EAV data from the client to a Relational Model on the server 0.00
Can anyone suggest a method of versioning ATTRIBUTE (rather than OB... 0.00
Purpose of joins in structured query language -0.65
What is combining repeating sets of row information into new entiti... 0.00
Can a multivalued attribute have a primary key? 0.00
Canonical cover is in which normal form? 0.00
Why should two equal objects return equal hash codes if I don't... -0.41
consider the following atttributes, which for clarity have been map... 0.00
Normalize two tables with same primary key to 3NF +0.43
Synthesis-algorithm for 3NF 0.00
Can I use a ternary relationship as an associative entity? 0.00
database normalization chaining +0.92
postgresql database design for ecommerce -2.42
Why is it necessary to write 0E5h in an Assembler code +0.09
Client-Server Data Synchronisation Algorithm 0.00
When will it be in 3NF? -0.51
Can someone explain this C++ program.The result is weird :( +0.25
join foreign keys' cardinality (relational algebra) 0.00
Why can a database table have only one primary key? -0.34
What is it called when there are two columns in a table that are in... 0.00
Need help in developing DB logic 0.00
When should I use a composite primary key? -1.93
Foreign Key Cross-Reference Between Tables +0.26
DB Normalization and single field break outs +0.51
4NF, Multivalued Dependencies without Functional Dependencies +0.50
foreign keys redundancy -0.01
What is Relational Integrity +2.02
Conditions in LEFT JOIN (OUTER JOIN) vs INNER JOIN -0.04
How to interpret this database assignment? 0.00
how identify subtype table by given primary key of super table in sql -0.56
how to insert same record in one column but different row in mysql? -0.51
Organize table avoiding redundancy +1.89
Is it reasonable to separate relation atributes with frequently dup... -1.68
Initialising string variable from a pointer array (in C) +0.01
SQL composite primary key -1.56
MySQL - Left joins without duplicate columns -0.35
What is the difference between "redundant" and "valu... 0.00
Difficulty understanding multiple recursive calls -0.50
optimistic locking user credit management -0.05
MYSQL: Howto get last download from 2 joined tables -0.00
How to store stops in routes in MySQL db? 0.00
Does the term NoSQL fit inside a DBMS? 0.00