How to Learn Oracle SQL 11g Online

SQL stands for Structured Query Language. SQL is a command language for communication with the Oracle Server from any tool or application. It is the language of the database. SQL is an ANSI (American National Standards Institute) and ISO(International Organization for Standards ) standard. It is the standard database query language. Once you get Oracle SQL 11g Online Training you will be able to update, delete, and request information from the database. Various databases like Oracle, Microsoft SQL Server, Microsoft Access, Sybase, Ingres etc support SQL. It is widely used in the industry and helps us in working with complex databases.

SQL is the programming language that uses commands very similar to the English language. Below is a list of operators used during coding:

Operator	Description	Example
=	Equal to	Author = 'Alcott'
<>	Not equal to (most DBMS also accept != instead of <>)	Dept <> 'Sales'
>	Greater than	Hire_Date > '2012-01-31'
<	Less than	Bonus < 50000.00
>=	Greater than or equal	Dependents >= 2
<=	Less than or equal	Rate <= 0.05
BETWEEN	Between an inclusive range	Cost BETWEEN 100.00 AND 500.00
LIKE	Match a character pattern	First_Name LIKE 'Will%'
IN	Equal to one of multiple possible values	DeptCode IN (101, 103, 209)
IS or IS NOT	Compare to null (missing data)	Address IS NOT NULL
AS	Used to change the table names when viewing results	SELECT employee AS 'department1'

Learn Oracle SQL 11g Online to apply these operators and commands.

SQL Language Elements

 The SQL language is based on several elements.  Following are the elements of the SQL Language:

Clauses -They are components of the statements and the queries.

Expressions -Expressions can produce values

Predicates - They specify conditions, which are used to limit the effects of the statements and the queries, or to change the program flow.

Queries -A query is used to retrieve data, based on a specific criteria.

Statements -These are used to control transactions, program flow, connections, sessions, or diagnostics.

Oracle SQL 11g online advanced courses help users with basic SQL knowledge gain expertise. An individual with little or no knowledge of programming can take this course since the commands are very close to the English language as opposed to other programming languages. A few other advantages of this language are that it formats query results into basic reports and is a non-procedural language. This language is widely used in the IT industry.