Example of not exists in sql, PL-SQL Programming

Assignment Help:

Example of NOT EXISTS in SQL

Example: Use of NOT EXISTS

CREATE ASSERTION Must_be_enrolled_to_take_exam_alternative1

CHECK (

NOT EXISTS (SELECT StudentId, CourseId

FROM EXAM_MARK

EXCEPT

SELECT StudentId, CourseId

FROM IS_ENROLLED_ON));

Related Discussions:- Example of not exists in sql

Collection methods in pl sql, Collection Methods: The collection me...

Collection Methods: The collection method is a built-in function or procedure which operates on the collections and is called using the dot notation. The methods like the C

Ssrs report writing, SSRS Report Writing Project Description: This re...

SSRS Report Writing Project Description: This report is part of a larger project to make a SQL Server Reporting Service (SSRS) based reporting solution. There can be more rep

Relational algebra, Define basic operators of relational algebra with an ex...

Define basic operators of relational algebra with an example each

Passing cursor parameters, Passing Cursor Parameters You use the OPEN ...

Passing Cursor Parameters You use the OPEN statement to pass the parameters to a cursor. Unless you want to accept the default values, each proper parameter in the cursor decl

Fetching with a cursor, Fetching with a Cursor The FETCH statements re...

Fetching with a Cursor The FETCH statements retrieve the rows in the result set one at a time. After each and every fetch, the cursor advance to the next row in the result set

Positional notation, Positional Notation The first procedure call uses...

Positional Notation The first procedure call uses the positional notation. The PL/SQL compiler relates the first actual parameter, account, with the first proper parameter, ac

Functions in pl/sql, Functions The function is a subprogram that cal...

Functions The function is a subprogram that calculates a value. The Functions and procedures are structured similar, except that the functions have a RETURN clause. You can

Rephrase conditional control statements, Rephrase Conditional Control State...

Rephrase Conditional Control Statements When computing a logical expression, the PL/SQL uses short-circuit evaluation. That is, the PL/SQL stops evaluating the expression as s

Rollback behavior - bulk bind performance improvement, Rollback Behavior ...

Rollback Behavior When a FORALL statement fails, the database changes are rolled back to an implicit savepoint marked before each of the SQL statement execution. The Changes t

Using for update, Using FOR UPDATE If you declare a cursor which will ...

Using FOR UPDATE If you declare a cursor which will be referenced in the CURRENT OF clause of an UPDATE or DELETE statement, you should use the FOR UPDATE clause to obtain an

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages