Difference between TYPE and LIKE?

data: a type "a data element",
        b like a.
I know the basic difference of these two statement. But what is the insight?

Have a look at below links:
http://help.sap.com/saphelp_nw2004s/helpdata/en/fc/eb367a358411d1829f0000e829fbfe/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/fc/eb2ff3358411d1829f0000e829fbfe/frameset.htm
If you use the addition TYPE, you can either reference to an inbuilt ABAP type, a predefined elementary type in the local program, or to a data element defined in the ABAP Dictionary. If you use a LIKE reference, dobj can be an existing data object with an elementary data type. If you do not use the TYPE or LIKE addition, the system uses the default predefined type c.
In other words, LIKE means the datatype of the variable is similar to the referenced variable.
TYPE means it is a predefined data type.
Eg:
DATA int TYPE i.
Here int is of integer data type.
DATA var LIKE int.
var IS a variable having same data type of int. which in turn is integer.
You can find these helpful when you reference database table variables... You need not know what is the datatype defined.
Also it adds to FLEXIBILITY.
Whenever you make changes to your database tables and fields, that change is REFLECTED back to your program that is, You need not change all your program code when you change your table fields...
I hope it helps.
Best Regards,
Vibha
*Please mark all the helpful answers

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  • What is the difference between TYPE and LIKE exaclty.

    Hi,
    Type refers to data type like C or I or N etc...
    example :
    matnr type mara-matnr.
    Like refers to data object.
    can also use in programs like:
    matnr like mara-matnr.
    I am not getting the exact difference in both.

    [Try here: lmgtfy|http://en.lmgtfy.com/?q=WhatisthedifferencebetweenTYPEandLIKEin+ABAP]

  • Difference b/w DATA TYPE and DATA OBJECT & differences b/w TYPE and LIKE

    hai
    can any one say the differences between Data type and Data Object.
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    Gani

    hi,
    _Data Types and Data Objects_
          Programs work with local program data – that is, with byte sequences in the working memory. Byte sequences that belong together are called fields and are characterized by a length, an identity (name), and – as a further attribute – by a data type. All programming languages have a concept that describes how the contents of a field are interpreted according to the data type.
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    Data Types
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    Predefined and User-Defined Elementary Data Types
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    Data Objects
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    What is the difference between Type and Like?
    Answer1:
    TYPE, you assign datatype directly to the data object while declaring.
    LIKE,you assign the datatype of another object to the declaring data object. The datatype is referenced indirectly.
    Answer2:
    Type is a keyword used to refer to a data type whereas Like is a keyword used to copy the existing properties of already existing data object.
    Answer3:
    type refers the existing data type
    like refers the existing data object
    reward if useful
    thanks and regards
    suma sailaja pvn

  • Help with TYPE and LIKE statements

    HI guys,
    I know this is really novice stuff, but I am a little confused.
    Can anyone please explain the exact difference between TYPE and like with the help of a program, to understand it.
    What situation would demand the use of each of the LIKE statement, since I can do all these things using the TYPE ?

    Hi Akhil,
    I summarized the info in SDN posts and SAP Help, to make it easier for you to understand. I also included some code snippets. Hope these prove to be helpful to you.
    The following is from SAP Help:
    The Additions TYPE and LIKE
    The additions TYPE type and LIKE dobj are used in various ABAP statements. The additions can have various meanings, depending on the syntax and context.
    ·        Definition of local types in a program
    ·        Declaration of data objects
    ·        Dynamic creation of data objects
    ·        Specification of the type of formal parameters in subroutines
    ·        Specification of the type of formal parameters in methods
    ·        Specification of the type of field symbols
    A known data type can be any of the following:
    ·        A predefined ABAP type to which you refer using the TYPE addition
    ·        An existing local data type in the program to which you refer using the TYPE addition
    ·        The data type of a local data object in the program to which you refer using the LIKE addition
    ·        A data type in the ABAP Dictionary to which you refer using the TYPE addition. To ensure compatibility with earlier releases, it is still possible to use the LIKE addition to refer to database tables and flat structures in the ABAP Dictionary. However, you should use the TYPE addition in new programs.
    The LIKE addition takes its technical attributes from a visible data object. As a rule, you can use LIKE to refer to any object that has been declared using DATA or a similar statement, and is visible in the current context.  The data object only has to have been declared. It is irrelevant whether the data object already exists in memory when you make the LIKE reference.
    ·        In principle, the local data objects in the same program are visible. As with local data types, there is a difference between local data objects in procedures and global data objects. Data objects defined in a procedure obscure other objects with the same name that are declared in the global declarations of the program.
    ·        You can also refer to the data objects of other visible ABAP programs. These might be, for example, the visible attributes of global classes in class pools. If a global class cl_lobal has a public instance attribute or static attribute attr, you can refer to it as follows in any ABAP program:
    DATA dref TYPE REF TO cl_global.
    DATA:  f1 LIKE cl_global=>attr,
           f2 LIKE dref->attr.
    You can access the technical properties of an instance attribute using the class name and a reference variable without first having to create an object. The properties of the attributes of a class are not instance-specific and belong to the static properties of the class.
    Example
    TYPES: BEGIN OF struct,
             number_1 TYPE i,
             number_2 TYPE p DECIMALS 2,
           END OF struct.
    DATA:  wa_struct TYPE struct,
           number    LIKE wa_struct-number_2,
           date      LIKE sy-datum,
           time      TYPE t,
           text      TYPE string,
           company   TYPE s_carr_id.
    This example declares variables with reference to the internal type STRUCT in the program, a component of an existing data object wa_struct, the predefined data object SY-DATUM, the predefined ABAP type t and STRING, and the data element S_CARR_ID from the ABAP Dictionary.
    The following info is from various posts:
    --> Type: It is used when userdefined object link with SAP system data type.
    Local types mask global types that have the same names. When typing the interface parameters or field symbols, a reference is also possible to generic types ANY, ANY TABLE,INDEX TABLE, TABLE or STANDARD TABLE, SORTED TABLE and HASHED TABLE.
    --> Like: It is when data object link with the other data object.
    --> TYPE, you assign datatype directly to the data object while declaring.
    --> LIKE,you assign the datatype of another object to the declaring data object. The datatype is referenced indirectly.
    you can refer to all visible data objects at the ABAP program's positon in question. Only the declaration of the data object must be known. In this case it is totally irrelevant whether the data object already exists physically in
    memory during the LIKE reference. Local data objects mask global data objects that have the same name.
    --> Type is a keyword used to refer to a data type whereas Like is a keyword used to copy the existing properties of already existing data object.
    Types: var1(20) type c.
    data: var2 type var1. ( type is used bcoz var1 is defined with TYPES and it
    does not occupy any memory spce.
    data: var3 like var2. ( like is used here bcoz var2 is defined with DATA
    so it does occupy space in memory ).
    data: material like mara-matnr. ( like is used here bcoz mara-matnr is stored in memory)
    --> Type refers the existing data type
    --> Like refers the existing data object
    Please Reward Points if any of the above points are helpful to you.
    Regards,
    Kalyan Chakravarthy

  • Whats  basic difference between data and types while declearing the itab

    whats  basic difference between data and types while declearing the internal tables...
    DATA : BEGIN OF t_vbap OCCURS 0,
    vbeln1 LIKE vbap-vbeln,
    posnr LIKE vbap-posnr,
    kwmeng LIKE vbap-kwmeng,
    netpr LIKE vbap-netpr,
    netwr LIKE vbap-netwr,
    werks LIKE vbap-werks,
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    arktx LIKE vbap-arktx,
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    vs
       TYPES : BEGIN OF t_vbap,
    vbeln1 LIKE vbap-vbeln,
    posnr LIKE vbap-posnr,
    kwmeng LIKE vbap-kwmeng,
    netpr LIKE vbap-netpr,
    netwr LIKE vbap-netwr,
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    posnr LIKE posnr,
    kwmeng LIKE kwmeng,
    netpr LIKE netpr,
    netwr LIKE netwr,
    werks LIKE werks,
    matnr LIKE matnr,
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    hi,
    like -> used for refering existing data elements in data dictionary or in sap
    type -> used for refering existing data types in sap.
    types: used for creating used defined structure of tables which has fields from more tahn one table.
    diff b/w types and type in creation of internal tables is that when u create a table with types then u can use same for work area creation also.
    ex:
    TYPES : BEGIN OF t_vbap,
    vbeln1 LIKE vbeln,
    posnr LIKE posnr,
    kwmeng LIKE kwmeng,
    netpr LIKE netpr,
    netwr LIKE netwr,
    werks LIKE werks,
    matnr LIKE matnr,
    arktx LIKE arktx,
    END OF t_vbap.
    data: itab1 type t_vbap
            wa_itab1 type t_vbap.
    when type is used then u have to create a defintion of work area for another time when internal table doesnt have headr line as
    ex:
    DATA : BEGIN OF t_vbap OCCURS 0,
    vbeln1 LIKE vbap-vbeln,
    posnr LIKE vbap-posnr,
    kwmeng LIKE vbap-kwmeng,
    netpr LIKE vbap-netpr,
    netwr LIKE vbap-netwr,
    werks LIKE vbap-werks,
    matnr LIKE vbap-matnr,
    arktx LIKE vbap-arktx,
    END OF t_vbap.
    DATA : BEGIN OF wa_vbap,
    vbeln1 LIKE vbap-vbeln,
    posnr LIKE vbap-posnr,
    kwmeng LIKE vbap-kwmeng,
    netpr LIKE vbap-netpr,
    netwr LIKE vbap-netwr,
    werks LIKE vbap-werks,
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    arktx LIKE vbap-arktx,
    END OF wa_vbap.
    if helpful reward soem points.
    with regards,
    suresh.

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