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philipxy

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1512.61 (54,505th)

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11,699 (12,666th)

Page: 1 2 3 4 5 ... 17

Title	Δ
Database engine that supports multiple primary keys?	-0.01
MySQL : One to One Relationship Tables Merging	-2.40
Is each component in a composite key a non-key attribute on its own?	0.00
Violation of 3NF if we use an auto-incremented identity column alon...	-0.98
Processing Images [Database Design]	0.00
MySQL workbench doesn't show the correct relationship between t...	0.00
Functional dependencies after normalization	0.00
What do I call this kind of database design pattern?	0.00
MySql - why primary key index is not sufficient?	+0.48
Mysql create table with two foreign keys referencing primary key	-0.01
MySQL - Performance issue in simple SUM()	0.00
Normalization of database according to the given data	-0.01
4NF decomposition with MVD	0.00
How to query using ← / back arrow / asignment / naming / renaming /...	0.00
Isn't it wrong to say Parent-Child tables in database design?	0.00
Find IDs in one table not present in another table	0.00
Redshift EXCEPT much slower than LEFT JOIN	0.00
Does Cardinality happen one at a time or it is about the whole life...	0.00
Multiple Self-Join based on GROUP BY results	+0.49
Which highest normal form is this table in?	+2.06
How to Get Left Join old ID	0.00
How can I speed up my Moodle mysql query with multiple self joins a...	-0.01
Is there a way to maintain a db relationship (pk/fk) in the followi...	0.00
Getting the sum of 2 different indices from 2 separate arrays	-0.00
Can a table be in 3NF with no primary keys?	0.00
Every derived table must have its own alias, but alias given to all...	0.00
Left join in SQL Developer yields incomplete master/left table	+0.16
Procedural and non-procedural query language difference	+2.40
Can we apply selection over projection in relational algebra	0.00
How do you ensure values from a logging table match objects in othe...	+0.06
Mapping a ternary relationship to the relational model (Employes, C...	-0.18
How to choose primary key and normalize this relation schema?	-1.25
Consequences of removing index used for foreign keys in MySQL	+2.52
Trying to understand "Only" and "All" constrain...	0.00
What is the difference between primary key, candidate key and super...	+0.41
If we change a primary key value, why don't we have to change a...	+0.52
Normal form of abstract relational schema	0.00
SQL Performance: Filter first or Join first	-1.23
Which query is more performant?	-1.61
Converting *= to LEFT OUTER JOIN correctly with two aliases and two...	+0.01
Is an MVD with a CK as determinant actually a FD?	0.00
Must a natural join be on a shared primary key?	+1.43
What would be the result of this operation on these tables?	0.00
When does BCNF not preserve functional dependencies, and should I t...	0.00
Does a data warehouse need to satisfy 2NF or another normal form?	0.00
naural join is giving Cartesian product of two relations	+1.36
How to reference a composite primary key in SQL	+2.31
poential issue with the sql in my code, resulting in foreign key er...	0.00
foreign key or null value to link two long distanced tables	-0.08
At what point should I create a separate table (mysql)?	-0.47