[relational] Forum Topics

In which real world scenarios where relational databases are not suitable ? Thanks.

This is a school project which I am a bit lost on. I have two tables with a relationship between course +-------------+----------------+ |id(primary) |coursename | +-------------+----------------+ enrolled +-------------+----------------+----------------+ |id(primary) |studentName |courseid(FK_from| | | |course.id) | +-------------+----------------+----------------+ I can insert a new course into the course table using the INSERT syntax …

I'm not sure if this is the right place to ask , but is this erd valid? Or is it unacceptable? Thank you for any help.

I came across the foll code: #include<stdio.h> main() { int i=4,j=7; j=j||(printf("you can")&&(i=5)); printf("%d %d",i,j); } output: 4 1 Athough I am specifying the braces for the && operator so that it gets executed first..Then also the value of i remains 4 only..Why doesnot it gets changed to 5??Also the …

Hi Prows,am creating a farm produce monitoring system using mysql and php.The database contains several tables of different produces that have the similar fields.The admin is supposed to update each table with different values.How will these datas relate. For example,maize field has Product-id,produce-name,location,date,time and mobile number of the buyer.Each table …

I need to turn the attached ER diagram into a relational model. This is what I have came up with, is it going the right direction or away off? relation AB1relationship a1 : A1 b1 : B1 primary key a1 foreign key a1 references A foreign key b1 references B …

Hello, I know relational algebra uses sets which eliminates duplicates values but I'm not sure about one thing. Duplicate values are impossible to exist in a relation ever? For example I can never have a relation R(A,B) with values (1,2),(1,2) ? Or they get eliminated <b>after</b> a projection or selection, …