IT Nursery
I am creating a system which polls devices for data on varying metrics such as CPU utilisation, disk utilisation, temperature etc. at (probably) 5 minute intervals using SNMP. The...
Disregarding performance, will I get the same result from query A and B below? How about C and D? -- A select * from a left join b on...
I’ve found the concept and meaning behind these methods to be a little confusing, is it possible for somebody to explain to me what the difference between has and...
I’m doing some research into databases and I’m looking at some limitations of relational DBs. I’m getting that joins of large tables is very expensive, but I’m not completely...
Can anyone explain how to implement one-to-one, one-to-many and many-to-many relationships while designing tables with some examples? 4 Answers 4
What is the difference between Views and Materialized Views in Oracle? 8 Answers 8
Good Overviews Generally speaking, you’re making a decision between fast read times (for example, nested set) or fast write times (adjacency list). Usually, you end up with a combination...