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Order by clause
Example:
SELECT EMPNO, ENAME, SAL*12 "ANNUAL" FROM EMP
ORDER BY ANNUAL;
Example: //Sorting by multiple columns//; ascending order on department number and descending order of salary in each department.
SELECT ENAME, DEPTNO, SAL FROM EMP
ORDER BY DEPTNO, SAL DESC;
Define shadow paging. An alternative to log-based crash recovery method is shadow paging. This technique requires fewer disk accesses than do the log-based methods.
notes about update opreation
A Relation Schema represented by R(A1, A2, ..., An) is made up of the relation name the list of attributes and R Ai that it contains. A relation is described as a set of tuples
Define value set? Value set: It is a set of values. You do not always need a user to enter junk free text within all the fields. Therefore, Oracle Apps uses value set to valida
Which element in the database can modified by changing the data dictionary? Data elements in the database can be changed or modified through changing the data dictionary.
Explain Domain calculus Domain calculus is one of the types of the relational calculus. The formal specification of the domain calculus was planned after the development of the
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how to design a bakery business in data base
What are the storage types? The storage types are: a) Volatile storage b) Nonvolatile storage
Write short notes on relational constraints? Relational Constraints are: 1. NOT NULL 2. Unique 3. Primary key 4. Foreign key 5. Table check
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