Difference bw data, type, tables

[Former Member]

DATA: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

TYPES: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

TABELS: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

[Former Member]

Hi,

1)

DATA: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

Declares a work area where you can have values in the work area in the run time..

2)

TYPES: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

Declares a type where you can use in a work area..But you cannot have values in the TYPES in the run time.

3)

TABELS: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

I believe this is not possible.

Thanks,

naren

[Former Member]

Hi,

1)DATA: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

With DATA you are actually declaring the Variables with or without referencing the TYPES.DATA statements allocate the memory at runtime.

2)TYPES: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

With TYPES you are defining the data types that can be used by other variables/itabs in the program.TYPES statement defines the structure without allocation of memory.

3)TABELS: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

U can't use tables for defining a work area.

Regards,

Padmam.

[Former Member]

Hi,

1. TYPES statement defines the structure without allocation of memory, DATA statements allocate the memory at runtime.

2. Create a structure by using types statement and refer it by using the DATA statement.

3. In order to avoid the internal table declaration without header line, we are declaring a structure by types statemnet and declaring an internal table with reference to the structure.

Table Type is one of the DATA TYPES which we create and reference to this datatype

<b>Reward points</b>

Regards

[Former Member]

Hi,

DATA: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

U can now use wa_spfli as a work area.(ie) a structure.

TYPES: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

Here u have defined a data type.. so u cannot use wa_spfli as it is as a structure..

u can define str n tables using this data type..

eg. data str type wa_spfli ...............(define structure of that type)

data itab type table of wa_spfli .............(define internal table using the tupe defenition)

TABELS: BEGIN OF wa_spfli,

carrid TYPE spfli-carrid,

END OF wa_spfli.

Ucannot use tables like this..

Syntax is ..

Tables <database table>.

This will create a workarea(structure) of the same type as the database table

also it will have the same name at the dbtab.

Regards,

Aparna