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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;
While using extract datasets it is required to have a special workarea for interface False. It is not required to have a special workarea for interface
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
The Locking Protocol: To manage concurrency related problems we use locking. A lock is mainly a variable that is associated with a data item in the database. A lock can be located
lock and types of lock
what is meant semantic query optimization? how does it differ from other query optimization techniques?
What is a database graph? The partial ordering implies that the set D may now be viewed as a directed acyclic graph, known as a database graph.
CREATE TABLE prodtrans ( pno number (4) ptype char (1) CHECK (ptype in ('I','R','S')), qty number (5) FOREIGN KEY pno REFERENCES product (pno) ON DELETE CASCADE);
Need 2 projects completed in 3NF format.
Sequences Sequences: Automatically produce unique numbers Are sharable Are typically used to make a primary key value Replace application code Speed up t
Scenario 1: Power goes out after the first instruction. What happens?
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