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What are the uses of ODBC? Under what circumstances we use this technology?
ODBC expose database capabilities within a standardized way to the application programmer by an application programming interface (API). In difference to Embedded SQL, ODBC permits a single executable to access various DBMSs without recompilation. Therefore, although Embedded SQL is DBMS- independent just at the source code level, applications using ODBC are DBMS- independent at the source code stages and at the level of the executable.
All direct interaction along with a exact DBMS happens by a DBMS-specific driver. A driver is a software program which translates the ODBC calls within DBMS-specific calls. Drivers are loaded dynamically on demand because the DBMSs the application is going to access are known just at run-time. Available drivers are registered along with a driver manager. The driver translates the SQL commands from the application within equivalent commands in which the DBMS understands. An application which interacts along with a data source by ODBC selects a data source, dynamically loads the corresponding driver, and establishes a connection along with the data source. ODBC achieves portability at the stages of the executable through introducing an extra level of indirection. Further, using ODBC, an application could access not only one DBMS but several various ones simultaneously.
E-R Model This data model is based on real world that consists of basic objects named entities and of relationship among these objects. Entities are illustrated in a database
Define average seek time. The average seek time is the average of the seek times, calculated over a sequence of random requests.
Which language used in application programs to request data from the DBMS is referred? Language which is used in application program is DML to request data from the DBMS is ref
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Have database built but having problems with some questions that go with the database
Company Database: a-)Here is the ER Model b-)Here is the Relational Model: IMPORTANT NOTICE FOR SOLUTION TYPE: ***THIS ASSIGNMENT WILL BE SOLVED BY THE
Differance between Unordered and ordered file ? Unordered file do no has any sequence although ordered file has arranged in a few sequence and data are assigned in ordered form
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