SQL

 SQL?

SQL  stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems. SQL statements are used to perform tasks such as update data on a database, or retrieve data from a database. Some common relational database management systems that use SQL are: Oracle, Sybase, Microsoft SQL Server, Access, Ingres, etc. Although most database systems use SQL, most of them also have their own additional proprietary extensions that are usually only used on their system. However, the standard SQL commands such as "Select", "Insert", "Update", "Delete", "Create", and "Drop" can be used to accomplish almost everything that one needs to do with a database. This tutorial will provide you with the instruction on the basics of each of these commands as well as allow you to put them to practice using the SQL Interpreter.

 SQL queries

The SQL queries are the most common and essential SQL operations. Via an SQL query, one can search the database for the information needed. SQL queries are executed with the “SELECT” statement. An SQL query can be more specific, with the help of several clauses:

• FROM - it indicates the table where the search will be made.
• WHERE - it's used to define the rows, in which the search will be carried. All rows, for which the WHERE clause is not true, will be excluded.

• ORDER BY - this is the only way to sort the results in SQL. Otherwise, they will be returned in a random order.  

 Simple Exampl Of SQL  Sql Example