Use of concatenate

Question

Hello Guys,
I have a doubt on concatenate.
That how it will be helpful in generating a reports in real time & also iam not having any demo code using concatenate. Try to hlp me for this & also send me any
sample code with using concatenate.
very urgent.
thank you.

Answer 1

Hi,
Look at this From SAP Help.
Concatenate :
CONCATENATE f1 ... fn INTO g.
1. ... SEPARATED BY h
2. ... IN BYTE MODE
3. ... IN CHARACTER MODE
Depending on whether byte or character string processing is carried out, the operands can only be byte-type or character-type (see Overview).
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See Use Only Character-Type Fields when Processing Strings
In some cases, the syntax rules that apply to Unicode programs are different than those for non-Unicode programs. See Character String Processing and Unicode
Effect
Places the fields f1 to fn (n >= 2) after g.
Note that trailing blanks in source fields of type C are ignored (since the system cannot distinguish between them and padding characters). Conversely, these blanks are taken into account in C strings. In summary, all fields are considered to have the length STRLEN( fi).
The Return Code is set as follows:
SY-SUBRC = 0:
The result fits in g.
SY-SUBRC = 4:
The result was too long for g and was truncated to fit g when copied.
Example
DATA: ONE(10)   VALUE ' John ',
      TWO(3)    VALUE 'F.',
      THREE(10) VALUE ' Kennedy',
      NAME(20).
      FIRST     TYPE STRING.
CONCATENATE ONE TWO THREE INTO NAME.
NAME then contains the value ' JohnF. Kennedy'.
But:
MOVE ONE TO FIRST.       "FIRST = ' John'
SHIFT FIRST CIRCULAR.    "FIRST = 'John '
CONCATENATE FIRST TWO INTO NAME.
NAME then contains the value 'JohnF. '.
Addition 1
... SEPARATED BY h
Effect
Inserts the separator h between the fields fi.
Here, h is used in its defined length, if the field is not of type STRING or XSTRING.
Examples
DATA: ONE(10)   VALUE 'John',
      TWO(3)    VALUE 'F.',
      THREE(10) VALUE 'Kennedy',
      NAME(20).
CONCATENATE ONE TWO THREE INTO NAME SEPARATED BY SPACE.
Then, NAME has the value "John F. Kennedy".
DATA SEPARATOR(4) VALUE 'USA'.
CONCATENATE SPACE ONE TWO THREE INTO NAME
            SEPARATED BY SEPARATOR.
Then, NAME has the value "USA JohnUSA F.USA Ke".
The Return Code SY-SUBRC is set to 4.
Addition 2
... IN BYTE MODE
Effect
Fields f1 to fn (n >= 2) are linked together and placed after g; all fields must be of type X oder XSTRING
Note that zeroes at the end of fields are not ignored.
Addition 3
... IN CHARACTER MODE
Effect
This is the default and does not have to be specified. Treat as described above.
Notes
Performance: You are recommended to use the key word CONCATENATE rather than your own constructions because it is safer, more efficient, and clearer.
If you use the CONCATENATE statement to cut part of a character-type field (example: CONCATENATE f(len) f+off INTO f) you should, for performance reasons, use the REPLACE SECTION statement.
Related
SPLIT, SHIFT, REPLACE, TRANSLATE, CONDENSE
Additional help
Concatenating Character Strings