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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
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What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
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What is the full form of ODBC ? ODBC stands for Open Database Connectivity.
Describe an data dictionary? A data dictionary is a data structure which keeps meta data about the structure of the database ie. the schema of the database.
explain five responsibilities of DBA?
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Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
entity relationship diagram for online examination system
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