Question : A common need when using a database is to access records in order. For example, if I have […]
Tag: database-agnostic
Is there any scenario where the existence of one or more Indexes in a table can prejudice it?
Question : The title sums it up. I’ve learned and always heard that indexes in tables improve CRUD operations. A […]
Apply Definition of MVD (multivalued dependency) to Example?
Question : Supposedly this multivalued dependency (MVD) and this functional dependency (FD): {W} ↠ {N,D} and {W} → {N} hold […]
How to create relationship metadata between tables without a foreign key check?
Question : I use database metadata (primary keys, foreign keys, table names, etc), to generate code and some very complex […]
Use expression in window function that references columns from the current row
Question : Suppose I have the following query that uses window function: SELECT id , var , num , SUM(var […]
Is there any security risk in having many foreign keys referencing a single table?
Question : I have a teacher who told me that having a database with a table that’s referenced by around […]
How do you store tabular data in an RDBMS?
Question : First: I really haven’t got any idea how to google for this. If you got one, leave a […]
How to create relationship metadata between tables without a foreign key check?
Question : I use database metadata (primary keys, foreign keys, table names, etc), to generate code and some very complex […]
Database agnostic auditing [duplicate]
Question : This question already has answers here: Implementing versioning system with MySQL (3 answers) Closed 6 years ago. Background […]
Pros and Cons of having additional columns in join table of many to many relationship
Question : I searched but did not find any discussions on this topic. Are there any pros and cons on […]