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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.
Using Aggregation on Nested Tables Example is the most direct translation of its counterpart in the theory book that can be obtained in SQL but it is so over-elaborate that no
GOTO Statement The GOTO statement branches categorically to a block label or statement label. The label should be exclusive within its scope and should precede a PL/SQL bloc
Definition of FROM - SQL Recall that the operand of FROM is denoted by a commalist, each element of that commalist being a table expression optionally accompanied by a range v
Bulk Fetching The illustration below shows that you can bulk-fetch from a cursor into one or more collections: DECLARE TYPE NameTab IS TABLE OF emp.ename%TYPE; TYPE S
I need SQL Data Base Project Description: Network SQL database and SQL Setup two 4 workstation Skills required are Data Entry, MySQL, SQL
Project Description: I have two types of data sources. One that is a list in SharePoint and another that is an access desktop database. The access desktop database is fairly com
Boolean Values Only the values TRUE, FALSE, & NULL can be assigned to a Boolean variable. For illustration, given the declaration DECLARE done BOOLEAN; the following statements
Transaction Control The Oracle is transaction oriented; that is, Oracle uses the transactions to make sure the data integrity. The transaction is a sequence of SQL data manip
Example of EXCEPT Operator - SQL Example, like its counterpart in the theory book, illustrates the convenience of allowing any table expression to be the source for an INSERT
THEO R Y OF SPECIAL CREATION - Life originated on the earth due to natural events by the super natural power. The biblical story of creation of world within six days was p
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