Updating sql record

When you use a Transact-SQL server cursor, you can update the current row by using an UPDATE statement that includes a WHERE CURRENT OF clause.

Changes made with this clause affect only the row on which the cursor is positioned. Business Entity ID) ; OPEN complex_cursor; FETCH FROM complex_cursor; UPDATE Human Resources.

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To support these techniques in database applications, PL/SQL provides the datatypes , which allow you to declare index-by tables, nested tables and variable-size arrays.

In this chapter, you learn how those types let you reference and manipulate collections of data as whole objects.

You also learn how the datatype is an ordered group of elements, all of the same type.

It is a general concept that encompasses lists, arrays, and other familiar datatypes.

Each element has a unique subscript that determines its position in the collection.

PL/SQL offers these collection types: Although collections can have only one dimension, you can model multi-dimensional arrays by creating collections whose elements are also collections.To use collections in an application, you define one or more PL/SQL types, then define variables of those types.You can define collection types in a procedure, function, or package.You can pass collection variables as parameters, to move data between client-side applications and stored subprograms.To look up data that is more complex than single values, you can store PL/SQL records or SQL object types in collections.Nested tables and varrays can also be attributes of object types.

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