mapping, Database Management System

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external and internal mapping with examples

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How the time stamps are implemented, How the time stamps are implemented ...

How the time stamps are implemented Use the value of the system clock as the time stamp. That is a transaction's time stamp is equivalent to the value of the clock when the tra

Which database object does not physically exist, Which database object does...

Which database object does not physically exist? A view database object does not physically exist.

Why dml is used for, Why DML is used for? DML is used to Manipulation and...

Why DML is used for? DML is used to Manipulation and processing of database. DML is provided for manipulation & processing of database. (Data stored in the database is processed

Speedup query processing, Speedup Query Processing: A query that includes d...

Speedup Query Processing: A query that includes data at various sites can be split into sub-queries. These sub- queries can be implemented in parallel by various sites. Such parall

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How are tables stored on Disk? We realise that every record of a table can have different amounts of data. This is due to in some records; some attribute values may be "zero".

What is a security, What is a security? Securities are claims on financ...

What is a security? Securities are claims on financial assets.  They can be illustrated as "claim checks" which give their owners the right to receive funds in the future.  Sec

Search the salary of employees who are not ‘analyst’ , Example- Search the ...

Example- Search the salary of employees who are not 'ANALYST' but get a salary below than or equal to any people employed as 'ANALYST'. SELECT EMPNO, ENAME, JOB, SAL FROMEMP

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Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.

Database Management System, Assume that you are responsible for selecting a...

Assume that you are responsible for selecting a new DBMS product for Sohar Hospital

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