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This link explains clearly what is that symbol. FYI
It must return 2.
so the answer is 2
I dont understand what this is asking
This might help:
condition is a boolean expression in which rows are selected for which the condition is true
rows are going vertically since they are asking for the number >3000 and the student name it should give you 2 rows
The condition is number < 3000, just in case someone gets confused.
What is the count of rows returned in the following relational selection?
WRITE 2 AND CLICK ON SUBMIT
Font size is too little in the expression
It is just asking how many relation does each person have
answer is 2
Where can I learn about all Notations mentioned in the question?
Like Pie Sigma ( sorry I can't find those symbols in keyboard)
I don't understand the notation. Where can I learn this?
visit W3schools or TutorialsPoint via Google
what do I search for? I don't know what this notation is called.
σ(Number<3000)(Student) I think you should be thinking about logic , es simple amigo!