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Having clause
Example: Find maximum salary and department number of those departments where maximum salary is more than Rs 20000/-.
SELECT DEPTNO, MAX(SAL) FROM EMP
GROUP BY DEPTNO HAVING MAX(SAL) > 20000;
normal forms
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
Explain what is RDBMS ? RDBMS - RDBMS is a database management system (DBMS) which stores data within the form of relations. Relational databases are powerful since they need f
explain external view
as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen
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Increases efficiency : Data is stored close to most often used site, therefore retrieval would be faster. Also, data that is not required by local applications is not stored, there
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