Saturday, July 5, 2014

Normalization of Relational Database and its types

A database stores data in an organized way so that it can be searched and retrieved later. It should contain one or more tables. A table is much like a spreadsheet, in that it's made up of rows and columns. All rows have the same columns, and each column contains the data itself. If it helps, think of your tables in the same way that you would a table in Excel.

Data can be inserted, retrieved, updated, and deleted from a table. The word, created, is generally used instead of inserted, so, collectively, these four functions are affectionately abbreviated as CRUD.

Conditional Statements in PL/SQL

As the name implies, PL/SQL supports programming language features like conditional statements, iterative statements.

The programming constructs are similar to how you use in programming languages like Java and C++. In this section I will provide you syntax of how to use conditional statements in PL/SQL programming.