what is the difference between VARCHAR and VARCHAR2?
Answers were Sorted based on User's Feedback
Answer / shishal
VARCHAR2 is Oracle and VARCHAR is ansi standard. Regardless
how they behave or how big it can be it's simply a vendor vs
standard issue.
There is a quotation from Christopher Allen “Oracle Database
10g, PL/SQL 101”:
“There is a datatype named VARCHAR as well. In early
versions of Oracle the maximum length of a VARCAR column was
1,000 characters, later expanded to 4,000 characters for the
datatype VARCHAR2. In current version of Oracle, both
datatypes enjoy 4,000-character limit. However Oracle
Corporation says they may change the behavior of a VARCHAR
column in future – and we have no way of knowing how the
“changed” VARCHAR will behave – so…”
Varchar2 is variable width character data type, so if you
define column with width 20 and insert only one character to
tis column only, one character will be stored in database.
Char is not variable width so when you define column with
width 20 and insert one character to this column it will be
right padded with 19 spaces to desired length, so you will
store 20 characters in the dattabase .Varchar data type from
Oracle 9i is automaticlly promoted to varchar2 .
Is This Answer Correct ? | 27 Yes | 12 No |
Answer / m arunachalam
These is a simple difference only...
Varchar- It can fixed size to the memory.
Ex:varchar(50)->Memory can take 50 characters to
allocate...
If You given string 'arunachalam' it contains 11 characters
and assign to memory. Remaining 39 character also assign to
empty character in memory....
Varchar2-It can fixed size by your given data length..
Ex:Varchar2(50)->Memory can take 50 characters to allocate...
If You given string 'arunachalam' it contains 11 characters
and assign to memory. Remaining 39 character here not assign
to memory and memory size should be reduced from remaining
size....
Is This Answer Correct ? | 15 Yes | 5 No |
Answer / vetrivel
VARCHAR:
Stores strings of variable length.
The length parameter specifies the maximum length of the strings
It stores up to 2000 bytes of characters
It will occupy space for NULL values
The total length for strings is defined when database was created.
VARCHAR2:
Stores strings of variable length.
The length parameter specifies the maximum length of the strings
It stores up to 4000 bytes of characters
It will not occupy space for NULL values
The total length of strings is defined when strings are given.
Is This Answer Correct ? | 4 Yes | 2 No |
Answer / atul
i am not satisfied to all answers because if we say that
vsize() both are give same answer pls clear my doubt .
thanks to above suggestion/ans.
Is This Answer Correct ? | 2 Yes | 3 No |
a book consists of chapter ,chapter consist of sections and sections consists of subsections.construct a tree and print the node.
i want to know about the scope of IT engineers in ONGC
plz send me interview questions & answers of Data Structure
what is the class of generator A b & c
as we know that java is a platform independent language, but we need jvm for the same operating system why?
Name a accredited or govt approved university which have 100% online engineering course
Please send me Sample papers National Informatics Centre (NIC) Programmer. I am giving this paper first time..so if any one have previous question papers send to manoj200.yadav@gmail.com. thnx in advance
5. Tell me about a time you were able to successfully deal with another person even when that individual may not have personally liked you (or vice versa).
Hi manikandhan, my name is ruby. Can u pls forward the conduct/character certificate on my Id. ruby_cse07@yahoo.co.in what details shall i require for this certificate. pls help me out with this..its really very urgent.. let me know soon bcoz my interview is on 19th septemper in mumbai...
As written, each loop iteration in the LIST-SEARC′ procedure requires two tests: one for x ≠ nil[L] and one for key[x] ≠ k. Show how to eliminate the test for x ≠ nil[L] in each iteration.
how can determine grounded motor when it alarm at 440volt
can u tell me any JAM topics.........and answers also...plz send me.........e-mail: anitha839@gmail.com