SAPLAB-SAP Tips,ABAP Tips!

Below Word document is SAP ABAP ALV Knowledge. I got this document from web. In my opinion this document is very useful for someone who wants to know about ALV.

Download ABAP ALV Knowledge(Chinese Version)

SAP ABAP basic documents, it is written in Chinese. Download.

ABAP syntax type is different from Like.

TYPE 敘述
用來指定資料型態或宣告自定資料型態
  Example:
        TYPES:  BEGIN  OF  MYLIST,
                   NAME(10)  TYPE  C,
                   NUMBER   TYPE  I,
                END  OF  MYLIST.
        DATA  LIST  TYPE  MYLIST.

LIKE 敘述
跟TYPE敘述使用格式相同, 如
   DATA  TRANSCODE  LIKE  SY-TCODE.
不同的是 LIKE 用在已有值的資料項, 如系統變數, 而TYPE敘述則是用在指定資料型態。

SY-SUBRC :  系統執行某指令后,表示執行成功与否的變數,’0′ 表示成功Return Value of ABAP Statements
SY-UNAME:  當前使用者登入SAP的USERNAME;
SY-DATUM:  當前系統日期; Current Date of Application Server
SY-UZEIT:    當前系統時間; Current Time of Application Server
SY-TCODE:   當前執行程式的Transaction code Current Transaction Code
SY-INDEX :   當前LOOP循環過的次數Loop Index
SY-TABIX:  當前處理的是internal table 的第几筆Index of Internal Tables
SY-TMAXL: Internal table的總筆數 Obsolete ABAP System Field
SY-SROWS: 屏幕總行數; Screens, numbers of lines
SY-SCOLS:  屏幕總列數; Screens, number of columns
SY-MANDT: CLIENT NUMBER Client ID of Current User
SY-VLINE:  畫豎線 Vertical Line
SY-ULINE:  畫橫線Horizontal Line

I like this document very much..You can find a lot of useful ABAP Tips on this document. It’s written in Chinese~

Download ABAP Tips.