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How does Oracle act as ODBC and give examples of front end uses with ODBC?
ODBC achieve portability at the level of the executable by introducing an extra level of indirection. All direct interaction with a specific DBMS happens through a DBMS- specific driver. A driver is a software program that translates the ODBC calls into DBMS- specific calls. Drivers are loaded dynamically on demand since the DBMSs the application is going to access are known only at run-time. Available drivers are registeredwith a driver manager. The Oracle database driver translates the SQL commands from the application into equivalent commands that the Oracle DBMS understands and takes the result from the DBMS and translate into equivalent form for the application.
Example: Let there be a DSN named EMPLOYEE through, which we want to access theOracle database in Visual Basic. Dim CN As New ADODB.Connection Dim RS As New ADODB.Recordset CN.Open "DSN=employee", "scott", "tiger"
What are the difference between clustered and a non-clustered index? A clustered index is a special type of index that reorders the way records in the table are physically stor
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What is candidate key? Candidate Key - A candidate key of an entity set is a minimal superkey, which uniquely identifies each row in the relation.
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Primary Index In primary index, there is a one-to-one relationship among the entries in the index table and the records in the major table. Primary index can be of two types:
explain three types of internet risks to the consummers whent he business system is data dependent. how can we minimise these risks
What is inheritance? Inheritance is an object orientation concept that allows reusability of code / design. Basic sense of inheritance is that if one class is predefined than a
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1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
Define a relation ? Relation - A relations is a named two-dimensional table of data. Mathematically, a relation can be described as a subset of the cartesian product of a lis
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