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What Is a CollectionThe collection is an ordered group of elements, all of similar type (for e.g. the grades for a class of students). Each element has a unique subscript which determines its position in the collection. The PL/SQL offers two collection types. The Items of type TABLE are either index-by tables or nested tables (that extend the functionality of the index-by tables). The Items of type VARRAY are varrays (short for the variable-size arrays).The Collections works like the arrays found in most of the third-generation programming languages. Though, collections can have only one dimension and should be indexed by the integers. (In few languages like Ada and Pascal, the arrays can have multiple dimensions and can be indexed by the enumeration types.)The Collections can store instances of an object type and, on the contrary, can be attributes of an object type. The collections can also be passed as parameters. Therefore, you can use them to move the columns of data into and out of the database tables or between client-side applications and stored subprograms. Moreover, you can define the collection types in a PL/SQL package, and then use them programmatically in your applications.
Based on the EMPLOYEE table created in Assignment #1, write a PL/SQL anonymous block that accepts an employee ID from the user input and finds whether the employee ID is in the EMP
Parameter and Keyword Description: cursor_name: This identifies an explicit cursor formerly declared within the present scope. cursor_variable_name: These identif
Grouping and Ungrouping in SQL Example specifying EXAM_MARK in place of COURSE in the main FROM clause. Example: Obtaining C_ER2 from EXAM_MARK SELECT CourseId, CAST
Definition of CROSS JOIN - SQL Let s = t1 CROSS JOIN t2, where t1 and t2 are table expressions optionally accompanied by range variables. Then: Note: Here T denotes Table
Literature review
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
Using Cursor Attributes To process the SQL data manipulation statements, the SQL engine must opens an implicit cursor named SQL. This cursor's attributes (%FOUND, %NOTFOUND, %
ORIGIN OF EARTH - BIG-BAN G HYPOTHESIS - Origin of life is linked to origin of earth. Cosmos, the Universe originated 10-20 billion years ago by Big Bang (thermonu
Consider the following set of database tables (same tables from Assignment 6-1). Please take note of foreign keys (most of them carry the same names as the corresponding primary ke
Parameter and Keyword Description: table_reference: This keyword identifies the table or view that should be accessible when you execute the UPDATE statement, and for wh
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