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Natural Join: It is the similar like Equi join except one of the duplicate columns is removed in the result table. The natural join is the most usually used form of join operation.
Example :
SELECT CUSTOMER.CUTOID, CUSTONAME, ORDERID FROM CUSTOMER, ORDER
WHERE CUSTOMER.CUSTOID=ORDER.CUSTOID;
Output will be:
custoid custoname orderid
----------- --------------------- ----------
10 Pooja Enterprises 1001
12 Estern Enterprises 1002
3 Impressions 1003
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
Benefits and limitations
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
Database systems have many opposite efforts ?
Briefly explain what is to be done during defining problem statement. To define Problem Statement of a system, define what is to be done and how you can go to implement that. Y
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Explain ODBC? ODBC - Open DataBase Connectivity (ODBC) enable the integration of SQL along with a general-reasons programming language.
What is Multivalued Attribute? Multivalued Attribute - Multivalued attribute might have more than one value for an entity. For instance, PreviousDegrees of a STUDENT.
what is Mapping Constraints? with examples
What are the two main goals of parallelism? Load -balance multiple small accesses, so that the throughput of such accesses enhances. Parallelize large accesses so that the res
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