Count operator in sql, PL-SQL Programming

Count Operator in SQL

Example: Counting the students who have scored more than 50 in some exam

(SELECT COUNT (*) FROM

(SELECT DISTINCT StudentId

FROM EXAM_MARK

WHERE Mark > 50) AS T)

Example is a direct translation of the corresponding example in the theory book but it can be abbreviated-and is much more likely to be written-as

(SELECT COUNT (DISTINCT StudentId )

FROM EXAM_MARK

WHERE Mark > 50)

Posted Date: 1/18/2013 6:04:40 AM | Location : United States







Related Discussions:- Count operator in sql, Assignment Help, Ask Question on Count operator in sql, Get Answer, Expert's Help, Count operator in sql Discussions

Write discussion on Count operator in sql
Your posts are moderated
Related Questions
Change Sql file into CSV for product registration on Magento Project Description: I have a set of files that are in Sql format and could like for a developer to help me with

Declaring Records Whenever you define a RECORD type, you may declare records of that type, as the illustration shows: DECLARE TYPE StockItem IS RECORD ( item_no INTEG

Using Operator DEREF: You cannot navigate through refs within the PL/SQL procedural statements. Rather than, you should use the operator DEREF in the SQL statement. The DEREF

EXECUTE Privilege To call an invoker-rights routine straightforwardly, the users should have the EXECUTE privilege on that routine. By yielding the privilege, you permit a user

Many of the reports generated from the system calculate the total dollars in a shopper''s purchases. Follow these steps to create a function named TOT_PURCH_SF that accepts a shopp

Effects of NULL in Aggregate Operator - SQL Let aggop(x) be an invocation of some aggregate operator aggop in SQL, where x is an expression (usually an open expression) to be

query to Find the account numbers of all customers whose balance is more than 10,000 $

Project Description: We organize an online system called ACPAS we have created a project called EVO that can be use by our customers to integrate their web sites with the Acpas

Some Varray Examples In SQL Plus, assume that you define an object type Project, as described below: SQL> CREATE TYPE Project AS OBJECT ( 2 project_no NUMBER(2), 3 title VARCHA

%ROWCOUNT The %ROWCOUNT yields the number of rows affected by the INSERT, UPDATE, or DELETE statement, or returned by a SELECT INTO statement. The %ROWCOUNT yields zero when a