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Pl/SQL Expressions The Expressions are constructed by using the operands and operators. An operand is a constant, literal, variable, or function call which contributes a value to an expression. An illustration of a simple arithmetic expression is shown below:-X / 2 + 3The Unary operators like the negation operator (-) operate on one operand; the binary operators like the division operator (/) operate on two operands. The PL/SQL has no ternary operators.The simplest expressions consist of a single variable that yields a value directly. The PL/SQL evaluates (finds the present value of) an expression by combining the values of the operands in ways specify by the operators. This forever yields a single value and datatype. The PL/SQL determines the datatype by examining the expression and the context in which it appear.
PPD , CPA, Filesharing Site Project Description: This is very easy I need a PPD , CPA, Filesharing Site. [PPD] stands for (pay per download) example hotsharecash [Files
Information Hiding With the information hiding, you see only the details that are significant at a given level of algorithm and data structure design. The Information hiding
Scoping Within the similar scope, all the declared identifiers should be unique. So, even if their datatypes differ, the variables and parameters cannot share the similar name.
Parameter Aliasing To optimize the subprogram call, the PL/SQL compiler can decide between the two techniques of the parameter passing. With the by-value techniques, the v
Using a Join on 2 tables, select all columns and all rows from the tables without the use of a Cartesian product. Query: SELECT * FROM EMPLOYEE1 JOIN CONTRACT ON EMPLOYEE
Write a cursor to open an employee database and fetch the employee record whose age is greater than 45
Use External Routines The PL/SQL is particular for the SQL transaction processing. Therefore, several tasks are more quickly completed in a lower-level language like C that is
Define basic operators of relational algebra with an example each
Control Structures The Control structures are the most important PL/SQL extension to the SQL. Not only does PL/SQL let you manipulate Oracle data, it lets you process the data
Initializing and Referencing Collections Until you initialize a collection, a nested table or varray is automatically null (i.e. the collection itself is null, not its elements)
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