Difference between Select * and Select single ?

difference between Select * and Select single ?

HI,
DATA : IT TYPE TABLE OF MARA,
WA TYPE MARA.
Here it selects all the record and keeps in internal table it.
Select * from mara into corresponding fields of table it.
Here it slects only one record that to first record.
If you wnat any specific record then use where condition.
Select single * from mara into corresponding fields of wa.
Message was edited by:
Purshothaman P

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Difference between screen and selection screen

explain the difference between
call screen
and
call selection-screen
with easy understandable explanation with simple example
thanks guyz

Hi,
CALL SCREEN interrupts the processing of the current screen to call a new screen or a chain of screens, processing of the current screen is resumed directly after the call.
Call selection-screen
Similar to CALL SCREEN, except the screen you are calling must be a selection screen defined using SELECTION-SCREEN BEGIN/END OF SCREEN or the standard selection screen of a report.
It calls the selection screen with in the program.
If you call a selection screen using CALL SCREEN instead of CALL SELECTION-SCREEN, the initialization necessary for selection screens is not carried out, and the screen will not run properly when displayed.
EG:
SELECTION-SCREEN BEGIN OF SCREEN 123 AS WINDOW TITLE TEXT-456.
SELECTION-SCREEN BEGIN OF BLOCK BL1 WITH FRAME TITLE TEXT-BL1
 NO INTERVALS.
 SELECT-OPTIONS SEL1 FOR SY-SUBRC.
 PARAMETERS PAR1 LIKE SPFLI-CARRID.
 SELECTION-SCREEN COMMENT /10(20) TEXT-COM.
SELECTION-SCREEN END OF BLOCK BL1.
SELECTION-SCREEN END OF SCREEN 123.
CALL SELECTION-SCREEN 123 STARTING AT 20 5.
IF SY-SUBRC = 0.
ELSE.
ENDIF.
rewards if useful,
regards,
nazeer

Difference between NULL and two single quotes

Hi,
Please advice me on the following.
First let's do an update.
update table_name set column_name ='';
After updating why do following queries return different results?
1. select count(*) from table_name where column_name is null;
2. select count(*) from table_name where column_name ='';
I understand update query set the column values to null and first select statement is the correct way to get the number of null values. But I want to know what's wrong with the second select statement.
Thank You.
Edited by: Sajeeva Lakmal on Jan 15, 2013 9:29 PM

Sajeeva Lakmal wrote:
Hi,
Please advice me on the following.
First let's do an update.
update table_name set column_name ='';
After updating why do following queries return different results?
1. select count(*) from table_name where column_name is null;
2. select count(*) from table_name where column_name ='';
I understand update query set the column values to null and first select statement is the correct way to get the number of null values. But I want to know what's wrong with the second select statement.
Thank You.
Edited by: Sajeeva Lakmal on Jan 15, 2013 9:29 PMhow can I reproduce what you report?

What is the diffrence between "Key to Select" and "Selected Key" while creating Radio Buttons?

While creating radio buttons there is a confusion regarding two properties "Key to Select" and "Selected Key".Can anybody explain it with example?
Thanks,
Vimal

Hi Vimal,
Please find my explanation as below
Key to Select: This is the unique key for each radio button to identify which one is selected
Selected Key: This holds the "KEY" of selected radio button
Example:
   Let us say we have 2 radio buttons : Male & Female
     Create a context attribute SELECTED_KEY of type STRING.
     Create an action ON_SELECT for radio button select event
     Now,
     the properties for "MALE" radio button as below
          KEY_TO_SELECT = 'M'
          SELECTED_KEY = "bind to the context attribute SELECTED_KEY
          OnSelect = 'ON_SELECT'.
     The properties for 'Female" radio button as below
          KEY_TO_SELECT = 'F'
          SELECTED_KEY = "bind to the context attribute SELECTED_KEY
          OnSelect = 'ON_SELECT'.
If we select radio button 'Male', we get the key as 'M' and for 'Female' radio button 'F'.
check inside the event handler method ONACTIONON_SELECT, you get the 'KEY' of selected radio button.
So, the context attribute 'SELECTED_KEY' gets filled with the key of selected radio button
Hope this helps you in distinguishing the 'KEY TO SELECT' & 'SELECTED KEY' .
Regards,
Rama

Difference Between BAPI And RFC in ABAP

Hi,
i want to know difference between BAPI and RFC in SAP,
can we call SAP GUI screen from NON SAP System Using BAPI.
Reg,
Hariharan

Hi Ravishankar,
The difference is not importat while you understand the concept.
I think, RFC is the protocol for calling functions from external systems in R/3.
I understand like BAPI a series of complet functions that SAP offers you for use and model a business use.
But if I need program a function that can be called for external system i would call it RFC_NAME, because is a unique function that makes a single task.
In other words, the difference i think is about work idea more than another thing.
RFC
A remote function call is a call to a function module running in a system different from the caller's. The remote function can also be called from within the same system (as a remote call).
RFC consists of two interfaces : A calling interface for ABAP Programs and a calling interface for Non-SAP programs.
The RFC Interface takes care of :-
- Converting all parameter data to the representation needed in the remote system
Calling the communication routines needed to talk to the remote system.
Handling communications errors, and notifying the caller, if desired ( using EXCEPTIONS paramater of the CALL FUNCTION).
BAPI
BAPIs are standardized programming interfaces (methods) enabling external applications to access business processes and data in the R/3 System.
BAPIs provide stable and standardized methods to achieve seamless integration between the R/3 System and external applications, legacy systems and add-ons.
BAPIs are defined in the BOR(Business object repository) as methods of SAP business object types that carry out specific business functions.
BAPIs are implemented as RFC-enabled function modules and are created in the Function Builder of the ABAP Workbench.
The most critical difference btwn BAPI and FM is that BAPI can be wrapped in Business objects whereas RFC cant.
BAPI are RFC enabled function modules. the difference between RFc and BAPI are business objects. You create business objects and those are then registered in your BOR (Business Object Repository) which can be accessed outside the SAP system by using some other applications (Non-SAP) such as VB or JAVA. in this case u only specify the business object and its method from external system in BAPI there is no direct system call. while RFC are direct system call Some BAPIs provide basic functions and can be used for most SAP business object types. These BAPIs should be implemented the same for all business object types. Standardized BAPIs are easier to use and prevent users having to deal with a number of different BAPIs. Whenever possible, a standardized BAPI must be used in preference to an individual BAPI.
The following standardized BAPIs are provided:
Reading instances of SAP business objects
GetList ( ) With the BAPI GetList you can select a range of object key values, for example, company codes and material numbers.
The BAPI GetList() is a class method.
GetDetail() With the BAPI GetDetail() the details of an instance of a business object type are retrieved and returned to the calling program. The instance is identified via its key. The BAPI GetDetail() is an instance method. BAPIs that can create, change or delete instances of a business object type
The following BAPIs of the same object type have to be programmed so that they can be called several times within one transaction. For example, if, after sales order 1 has been created, a second sales order 2 is created in the same transaction, the second BAPI call must not affect the consistency of the sales order 2. After completing the transaction with a COMMIT WORK, both the orders are saved consistently in the database.
Create( ) and CreateFromData! ( )
The BAPIs Create() and CreateFromData() create an instance of an SAP business object type, for example, a purchase order. These BAPIs are class methods.
Change( )
The BAPI Change() changes an existing instance of an SAP business object type, for example, a purchase order. The BAPI Change () is an instance method.
Delete( ) and Undelete( ) The BAPI Delete() deletes an instance of an SAP business object type from the database or sets a deletion flag.
The BAPI Undelete() removes a deletion flag. These BAPIs are instance methods.
Cancel ( ) Unlike the BAPI Delete(), the BAPI Cancel() cancels an instance of a business object type. The instance to be cancelled remains in the database and an additional instance is created and this is the one that is actually canceled. The Cancel() BAPI is an instance method.
Add<subobject> ( ) and Remove<subobject> ( ) The BAPI Add<subobject> adds a subobject to an existing object inst! ance and the BAPI and Remove<subobject> removes a subobject from an object instance. These BAPIs are instance methods.
Check these Links out
http://searchsap.techtarget.com/ateQuestionNResponse/0,289625,sid21_cid558752_tax293481,00.html
http://www.sap-img.com/abap/interview-question-on-bapi-rfc-abap-objects-tables.htm
http://www.sap-img.com/fu033.htm
http://www.sap-img.com/abap/ale-bapi.htm
Refer following SDN threads:
Diff. Between BAPI and RFC
Re: BAPI and RFC
Hope this resolves your query.
Reward all the helpful answers.
Regards

Differences between SLIN and Code Inspector

Hi,
Can anyone tell me the differences between SLIN and Code Inspector(SCI)..?
and in which cases we use SLIN and SCI..?
and as an ABAPer, which one should we prefer..?
Thanks,
Pradeep.

Hi
Extended syntax check or SLIN is used to check the program in all aspects for the different syntaxes like
When you use select single whether you have passed all the key fields or not>
whether you have maintained the text elements texts or not,
Have you used UNIT...CURRENCY along with the QTY and AMOUNT fields when displayed using the WRITE statement
and check for all the varities of statements used in the code, and if there is some problem with that statement/command, it will display as error or warning.
Check following links -
slin
can any one tell me abt SLIN T-CODE
Reward points if useful
Regards
Anji

What is the difference between occurs0 and occurs1

pls explain about the difference between occurs0 and occurs1 in sap-abap.

Hi Suresh,
WELCOME TO SDN
Please check this link
diff b/w occurs 0 and 1
Occurs 0 and Occurs 1...
Occours 0
Occurs 1 allocates 1 unit of memory(Sufficient to hold one record) and and when one record is appended, one more unit of memory is allocated.
Occurs 0 will allocate memory dynamically.It will not allocate any memory when the itab is declared.
Coming to performance: If you know that you will store only one single value in the Internal table If you use OCCURS 1. It would perform well than OCCURS 0.
Occurs 0 keeps on incrementing when there is a value. But Occurs 1 will assign a single space even though there is no value.
Lets suppose you did not get any values from the DB after a select, in this case if you write Occurs 0 it will not allocate any single space in the memory. If you write OCCURS1 it will pre allocates some memory.
Hope this helps...
Best regards,
raam

Difference between Macros and subroutines

Hi experts can any one tell difference between macros and subroutines.

1) Macros can only be used in the program the are defined in and only after the definition are expanded at compilation / generation. Subroutines (FORM) can be called from both the program the are defined in and other programs . A MACRO is more or less an abbreviation for some lines of code that are used more than once or twice. A FORM is a local subroutine (which can be called external). A FUNCTION is (more or less) a subroutine that is called external. Since debugging a MACRO is not really possible, prevent the use of them (Ive never used them, but seen them in action). If the subroutine is used only local (called internal) use a FORM. If the subroutine is called external (used by more than one program) use a FUNCTION
2) The macros, which we may use,
(stored in table TRMAC)
, we cannot debug that code.
3) where as in subroutine,
its a abap code, directly visile in
the editor,
and we can debug this code.
4) MACROS =>
Getting a feel of macros
The basic syntax of macros is as follows:
DEFINE macro_name. "Macro Definition
. Statements
. Statements
END-OF-DEFINITION. "Macro Definition
macro_name par1 par2 par9. "Macro call -parameters separated by spaces
Within the DEFINE... and END-OF-DEFINITION lies the body of the macrothe statements that you wish to be executed each time the macro is called. These statements may be any valid ABAP statements, such as WRITE, CLEAR, FORM calls, or database statements such as SELECT or UPDATE.
To familiarize yourself with the working of macros, it's necessary to take a close look at exactly what happens when an ABAP program containing a macro call is generated. Consider Listing A.
All ABAP programs must be generated before they can be executed. At the time of program generation, the system supplants each macro call, as shown in Listing A, with the statement(s) placed between the macro definition. Furthermore, the parameters passed at the time of macro calling are copied in place of the any placeholders (numbered &1, &2 &9) found in the body of the macro definition. The system simply ignores the presence of the macros during the execution of the programthat is, all statements are executed as a single block of code:
write : int1.
write : int2.
write : int3.
Other than readability and meaningfulness, macros also offer performance advantages. For testing purposes, I wrote a macro that incremented the value of a variable by 1 and called the macro N times via a DO loop, as shown here:
DEFINE INCREMENT.
ADD 1 TO &1.
END-OF-DEFINITION.
DO N TIMES.
INCREMENT VAR1.
ENDDO.
SUBROUTINES=>
Subroutines
You call subroutines from ABAP programs using the PERFORM statement.
Subroutines are introduced with the FORM statement and concluded with the ENDFORM statement.
You can define subroutines in any ABAP program. You can either call a subroutine that is part of the same program or an external subroutine, that is, one that belongs to a different program. If you call an internal subroutine, you can use global data to pass values between the main program and the subroutine. When you call an external subroutine, you must pass actual parameters from the main program to formal parameters in the subroutine.
*U Shud start rewarding helpfull answers*
amit

What is the difference between cumulative and non cumulative keyfigures?

Hi Friends
What is the difference between cumulative and non cumulative keyfigures, when we r using the cumulative and non cumulative
Regards
Ravindra

Hi Ravindra,
Have a look at the help:
http://help.sap.com/saphelp_nw2004s/helpdata/en/8f/da1640dc88e769e10000000a155106/frameset.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/80/1a62f8e07211d2acb80000e829fbfe/frameset.htm
Go through these.
Re: Types of non-cumulative keyfigures
http://help.sap.com/saphelp_nw2004s/helpdata/en/8f/da1640dc88e769e10000000a155106/content.htm
See the following threads
non-cumulatives KF in reporting
Re: use of non cumulative keyfigure
Re: When do we use Non-Cumulative values?
Key figures:
1. Cumulative Vaules
2. Non Cumulative Values
Cumulative Values:
Cumulative Values are Keyfigures for which Keyfigure Values are must posted in every time unit that reported on (= time period specific Values).
Example:
Revenue
Non Cumulative Values:
Non Cumulative Values are Keyfigures for which KeyFigures are only evaluated for selected time Periods.
Cumulative Keyfigures With Exception Aggregation:
It's a 'normal' KF (with summation, min or max as aggregation behaviour), but you set some exception in this behaviour...for example, you can say that a KF, normally aggregated by 'summation', have to show the max value (or the average, or '0' or something else), that is the 'exception aggregation' when you use it in combination with 0DOC_DATE (or other char), that is the 'exception aggregation char reference'...in this case OLAP processor give to you the possibility to see your KF with different behaviour depending from you use 0DOC_DATE (in our example, MAX) or something else (SUMMATION).
Non Cumulative keyfigure with Associated Single Delta:
If you have a stock KF that is fed from only one (other) movement KF that can assume positive and negative sign.
KF1 (initial) STOCK (non-***.) = 100
KF2 flow = -30
KF2 flow = 70
KF1 (final) STOCK (non-***.) = 140
Non-cumulative key figure with associated in and outflow:
This is the case of 2LIS_03_BF KF stocks fields.
Here, we have the same situation in point 2, but you will have not only ONE flow KF, but TWO, one dedicated to in and another one dedicated to out !
You have to use this scenario if you have no KF that have positive and negative sign, but two KFs each one representing positive (in) and negative (out) logical sign!
KF1 (initial) STOCK (non-***.) = 100
KF2 (out))flow = 30
KF3 (in)flow = 70
KF1 (final) STOCK (non-***.) = 140
Website Addresses For Non Cumulative KeyFigures:
http://help.sap.com/saphelp_nw04/helpdata/en/80/1a62dee07211d2acb80000e829fbfe/frameset.html
http://help.sap.com/saphelp_nw04/helpdata/en/82/f2dc37f0f12313e10000009b38f8cf/content.html
http://help.sap.com/saphelp_bw31/helpdata/en/82/f2dc37f0f12313e10000009b38f8cf/content.html
http://help.sap.com/saphelp_erp2004/helpdata/en/d2/e0173f5ff48443e10000000a114084/content.html
Re: Non-Cumulative keyfigure example
Re: Types of non-cumulative keyfigures
/community [original link is broken]
http://help.sap.com/saphelp_bw32/helpdata/en/80/1a62dee07211d2acb80000e829fbfe/frameset.html
/community [original link is broken]?forumID=131&threadID=29557&messageID=273049
/community [original link is broken]?forumID=131&threadID=111914&messageID=1248243
Check this very useful docu.
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/93ed1695-0501-0010-b7a9-d4cc4ef26d31
****Assign Points If Helpful****
Regards,
Ravikanth

Difference between Insert and Insert all

Hi,
I tried to understand what INSERT ALL syntax is doing, but I cannot find any difference between INSERT and INSERT ALL.
I replicated the test scenario using the data from the below mentioned URL:
http://psoug.org/reference/insert.html
I also did a google on finding up the difference between them, but could not find any...
Please advice if both are same as I have planned to use INSERT statement with a WHEN clause if INSERT ALL is same as INSERT.
Thanks!

Hello
The key difference is that INSERT ALL will allow you to insert into multiple different tables in a single statement whereas INSERT will only insert into 1 table. Each of the WHEN clauses allows a different table to be specified.
SQL> create table t1
2 ( id number
3 )
4 /
Table created.
Elapsed: 00:00:00.01
SQL> create table t2
2 ( id number
3 )
4 /
Table created.
Elapsed: 00:00:00.00
SQL> create table t3
2 ( id number
3 )
4 /
Table created.
SQL> INSERT
2 ALL
3 WHEN id < 10 THEN
4 INTO t1 VALUES(id)
5 WHEN MOD(id,2) = 0 THEN
6 INTO t2 VALUES(id)
7 WHEN MOD(id,2) != 0 THEN
8 INTO t3 VALUES(id)
9 SELECT
10 rownum id
11 FROM
12 dual
13 CONNECT BY
14 LEVEL <=20
15 /
29 rows created.
Elapsed: 00:00:00.01
SQL> select * from t1;
 ID
 1
 2
 3
 4
 5
 6
 7
 8
 9
9 rows selected.
Elapsed: 00:00:00.01
SQL> select * from t2;
 ID
 2
 4
 6
 8
 10
 12
 14
 16
 18
 20
10 rows selected.
Elapsed: 00:00:00.00
SQL> select * from t3
2 /
 ID
 1
 3
 5
 7
 9
 11
 13
 15
 17
 19
10 rows selected.
Elapsed: 00:00:00.01So you can see that in a single statement, I've inserted all rows with an ID <10 into t1, all even numbered rows into t2 and all odd numbered rows into t3. This was also done with a single pass of the source table - in this case dual.
David

What is the difference between Structure and Work area

Hi Guys,
What is the difference between Structure and work area?
Are they same with different names?
Thanks,
mini.

hey buddies,*
i had this same doubt for a long time and i have my finds with me ie wa and structure are the same but wa can hold a single record but structure cannot hold data in it but according to the previous posts folks say structure too holds data as wa does but i guess when debugging wa holds data and structure doesnt hold bcoz i tried.
types : begin of str_mara,
             matnr type mara-matnr,
            ernam type mara-ernam,
            end of str_mara.
data it_mara type table of str_mara.
select matnr ernam from mara into it_mara where matnr = '100-101'.
*********************if folks say wa = structure,this should work,isn't it?*********************************
loop at it_mara into str_mara.
write:/ str_mara-matnr , str_mara-ernam.
endloop.
*******************but it throws an error saying that str_mara is not a wa*******************************
i may not be correct too plz let me know if i'm wrong
Edited by: arun_aime on Feb 12, 2010 4:41 PM

Difference between char and varchar, also the difference between varchar2

Hi,
Can anyone explain me the difference between char and varchar, and also the difference between varchar and varchar2...

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 (follow the example 1). Varchar data type from Oracle 9i is automaticlly promoted to varchar2 (follow example 2)
Example 1:
SQL> create table tchar(text1 char(10), text2 varchar2(10))
2 /
Table created.
SQL> insert into tchar values('krystian','krystian')
2 /
1 row created.
SQL> select text1, length(text1), text2, length(text2)
2 from tchar
3 /
TEXT1 LENGTH(TEXT1) TEXT2 LENGTH(TEXT2)
krystian 10 krystian 8
Example 2:
create table tvarchar(text varchar(10))
SQL> select table_name,column_name,data_type
2 from user_tab_columns
3 where table_name = 'TVARCHAR'
4 /
TABLE_NAME COLUMN_NAME DATA_TYPE
TVARCHAR TEXT VARCHAR2
Best Regards
Krystian Zieja / mob

What is the difference between exists and in

hi all
if i have these queries
1- select ename from emp where ename in ( select ename from emp where empno=10)
and
2- select ename from emp where exists ( select ename from emp where empno=10)
what is the difference between exists and in is that only when i use in i have to bring the field name or what.... i mean in a complex SQL queries is it will give the same answer
Thanks

You get two entirely different result sets that may be the same. Haah! What do I mean by that.
SQL> select table_name from user_tables;
TABLE_NAME
BAR
FOO
2 rows selected.
SQL> select table_name from user_tables where table_name in (select table_name from user_tables where table_name = 'FOO');
TABLE_NAME
FOO
1 row selected.
SQL> select table_name from user_tables where exists(select table_name from user_tables where table_name = 'FOO');
TABLE_NAME
BAR
FOO
2 rows selected.So, why is this? the WHERE EXISTS means 'if the next is true', much like where 1=1 being always true and 1=2 being always false. In this case, where exists could be TRUE or FALSE, depending on the subquery.
WHERE EXISTS can be useful for something like testing if we have data, without actually having to return columns.
So, if you want to see if an employee exists you might say
SELECT 1 FROM DUAL WHERE EXISTS( select * from emp where empid = 10);
If there is a row in emp for empid=10, then you get back 1 from dual;
This is what I call an 'optimistic' lookup because the WHERE EXISTS ends as soon as there is a hit. It does not care how many - only that at least one exists. It is optimistic because it will continue processing the table lookup until either it hits or reaches the end of the table - for a non-indexed query.

Difference between BAPI and RFC?

Difference between BAPI and RFC?
also where to use BAPI and where to use RFC?

Hi,
BAPI are RFC enabled function modules. the difference between RFc and BAPI are business objects. You create business objects and those are then registered in your BOR (Business Object Repository) which can be accessed outside the SAP system by using some other applications (Non-SAP) such as VB or JAVA. in this case u only specify the business object and its method from external system in BAPI there is no direct system call. while RFC are direct system call Some BAPIs provide basic functions and can be used for most SAP business object types. These BAPIs should be implemented the same for all business object types. Standardized BAPIs are easier to use and prevent users having to deal with a number of different BAPIs. Whenever possible, a standardized BAPI must be used in preference to an individual BAPI.
The following standardized BAPIs are provided:
Reading instances of SAP business objects
GetList ( ) With the BAPI GetList you can select a range of object key values, for example, company codes and material numbers.
The BAPI GetList() is a class method.
GetDetail() With the BAPI GetDetail() the details of an instance of a business object type are retrieved and returned to the calling program. The instance is identified via its key. The BAPI GetDetail() is an instance method. BAPIs that can create, change or delete instances of a business object type
The following BAPIs of the same object type have to be programmed so that they can be called several times within one transaction. For example, if, after sales order 1 has been created, a second sales order 2 is created in the same transaction, the second BAPI call must not affect the consistency of the sales order 2. After completing the transaction with a COMMIT WORK, both the orders are saved consistently in the database.
Create( ) and CreateFromData! ( )
The BAPIs Create() and CreateFromData() create an instance of an SAP business object type, for example, a purchase order. These BAPIs are class methods.
Change( )
The BAPI Change() changes an existing instance of an SAP business object type, for example, a purchase order. The BAPI Change () is an instance method.
Delete( ) and Undelete( ) The BAPI Delete() deletes an instance of an SAP business object type from the database or sets a deletion flag.
The BAPI Undelete() removes a deletion flag. These BAPIs are instance methods.
Cancel ( ) Unlike the BAPI Delete(), the BAPI Cancel() cancels an instance of a business object type. The instance to be cancelled remains in the database and an additional instance is created and this is the one that is actually canceled. The Cancel() BAPI is an instance method.
Add<subobject> ( ) and Remove<subobject> ( ) The BAPI Add<subobject> adds a subobject to an existing object inst! ance and the BAPI and Remove<subobject> removes a subobject from an object instance. These BAPIs are instance methods.
Regards,
Prakash

Difference between IS and AS in procedure?

difference between IS and AS in procedure?

prakash wrote:
hi,
http://www.oracle.com/pls/db111/portal.portal_db?selected=5&frame=#sql_and_pl_sql_languages
Here you get everything ..
functionality wise there is no difference between IS , AS of a procedure .
Thanks,
P PrakashI think oracle document do not talk about the Difference or No Difference between IS and AS. So i feel this is not a question that need to be pointed to the document.
To OP
Basically as others said there is no difference between them. They are just gramatical representation.
For example when i create a standalone stored procedure i tend to use AS and when i create a procedure inside a package i tend to use IS. Its just the choice you can make.

Difference between Select * and Select single ?

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