In pl/sql there is three letter extra "pl/" but it was not
in sql

No.The above is not a correct one.
The appropriate answer is there is only 2 letters 
extra "pl" and one special charcter "/" extra.

Usually we will used to mention pl/sql, so there are three
characters differing. And considering the special character
is mandatory.

Similarly i have many answers for the critical and vertical
questions.
Even you can reach me by mail-id.
karthik.krishnagiri@gmail.com

I donot know about the people posting answer here with 
correct sense or not. Beacuse many of candidate use this 
forum as reference. This kind of answers will mis guide 
them.

Actually,

All those above answers are wrong..Because the question is 
itself wrong as it has a spelling mistake for "difference" 
and its displayed as "difrence".People like me only can 
find this error(Bug) as because i wear Specs.

For more exact answers please contact : aar.sundar@gmail.com

Hello!!

If you people dont know the answer please atleast learn 
from my post. 

Ans : The main diffrence is ,SQL is only for team members 
but when the project lead uses it,then its named as 
ProjectLead SQL (shortly pl/sql)

So i think you people understood my technical knowledge, So 
for any answers contact me(Incoming free).

Thanks for the reply and suggestions
But people Please dont talk jargunds.
Can someone comeup with an explanation understandable to a 
lay man.
Thanks in advance!!!

SQL is the strutctured query language but pl/sql is the
procedural language sql.difference is in pl/sql we can work
with data in the form by writing program which has
predefined structure. but sql does not have.

Differce B/W Pl/sql & sql is that pl/sql is used gor 
Logical databese Creation. it is used in backend . It is 
used for Programming.

sql is Used for front end & Used for Physical data base 
creation maintain tabes & rows.

Sql is structured query language and pl/sql is programing 
langugae that means you can use procedure ,function and 
other. in pl/sql you can store procedure and function in 
database and later these can be used.

SQL is a data oriented language for selecting and
manipulating sets of data. PL/SQL is a procedural language
to create applications. You don't normally have a "SQL
application". You normally have an application that uses SQL
and a relational database on the back-end. PL/SQL can be the
application language just like Java or PHP can. SQL may be
the source of data for your screens, web pages and reports.
PL/SQL might be the language you use to build, format and
display those screens, web pages and reports.

Think of it like this: The code that makes your program
function is PL/SQL. The code that manipulates the data is
SQL DML. The code that creates stored database objects is
SQL DDL. DDL compiles the code that is written in PL/SQL.
PL/SQL may call SQL to perform data manipulation. The
commands that format the output of a tool are not related to
the SQL standard or to PL/SQL.

sql -> structure query language.
pl/sql -> procedure language in structure query language.
this is the main difference..

SQL is a structured query language.
Actually SQL is a set of rules defined by mr.Codd.
Any database like oracle,derby or sybase has to follow 
these rules.We can say that database following maximum 
codd's rule(there are 12 rules) is better than other like 
oracle follows 11 rule so it is better than other.

there are different categories in SQL
MySql-->supports triggers and cursors
Pl/Sql-->supports procedures.
Tl/Sql-->supports transactions.
MSSql-->it is microsoft version of SQL.

SQL is structured query language which is used to retrive 
data from the database. Before 1974 it is known as Gupta 
SQL. In 1974 Relational solutions Inc(Now oracle 
corporation) taken it as a native lang to retrive data. 
Though it is structured quer language it is un structured 
its like simple english language. 

   Pl/Sql is an extension for Sql. It is a structured 4th 
generation language where one can execute more than one 
select statement with conditional constructs like if, then 
and else.

SQL Enter, Edit, Store & Retrieve by single command or 
statement where as PL/SQL process all SQL statements one at 
a time. With PL/SQL, an entire block of statements process 
in a single command line. 

SQL in a strucutred query language; where pl/sql is 
procedures,function,variable,method all are present