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Explain outer join?
Outer Join - If there are any values in one table which do not have corresponding value(s) in the other, in an equi-join which will not be chosen. Such rows could be forcefully selected through using the outer join. The corresponding columns for in which row will have NULLs. There are actually three forms of the outer-join operation: left outer join ( X), right outer join (X ) and full outer join ( X ).
What is Data Storage? The storage structures and access methods used by database system are specified by a set of explanation in a special type of DDL called data storage-defin
#question.what is mapping constraints and types?.
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
Hello.I have database access assignment which consist of creation Form, Subform, Calculation, Macros
under what condition log based recovery is feasible?
Availability: A site having the copy of a replicated relation fails, even then the relation may be found in another site. Therefore, the system may carry on to process at least th
How to create values of structured type? Constructor functions are used to make values of structured types. A function with the similar name as a structured type is a construct
atient(PNumber, Name, NHS_no, Amount_due, DNO, Doctor, Medical_Treatment), relation of schema Staff(StaffNum, Name, DNO, Task) and relation of schema Dept(DNO, Name, Location, Dire
What is known as heap file organization? In the heap file organization, any record can be placed anywhere in the file where there is space for the record. There is no ordering
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