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[SAP ABAP] Building User Interfaces

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In  Systems, Applications, Products  ( SAP ), we have various technologies for presenting user interfaces. We can use classic DynPro, which we will focus on in this chapter. This is based on the SAP GUI and is almost completely integrated with ABAP and web-based technologies such as SAPUI5. Classic DynPro is divided into two categories:  Classic DynPro  Selection screens Despite the fact that these two categories use the same technology, the methods for programming them are different. Classic DynPro (named  screen ) needs to be created in Screen Painter in the ABAP Workbench, as well as being called in  CALL SCREEN  statement. The selection screen can be  defined  purely in ABAP and it is a specific classic DynPro. Classic DynPro As some may not know the basics of classics DynPro, I will start with a short introduction explaining how we can call screens or types of screens. If you have  some  knowledge of sc...
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[SAP ABAP] Data declaration

After learning about the objects in the Data Dictionary, we can  start  talking about the syntax declaration in ABAP. The easiest way to declare variables is as follows: Copy data: lv_first_variable TYPE c. Variables are named data objects that are used to store values within the allotted memory area of a program. It is good practice to properly name local variables. It is assumed that the first two characters in the variable name determine its use. The first letter indicates whether the variable is global or local. If the local variable starts with  l , then in the case of global variables,  g  is the first letter. The second character determines what type the object is: Variable :  v Line :  s Internal table :  t Each variable must have a type that describes what is stored inside. A variable may have the following types: Elementary types References User-defined types Generic ABAP types In the ABAP language, you ca...
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[SAP ABAP] Databases Part 1

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INTO : When we choose this, we can select fields to structure. An example can be found in the explanation of  SELECT SINGLE . INTO CORRESPONDING FIELDS OF : We can  also  use this addition, but, during  SELECT , the system tries to select and match fields corresponding to data elements in a result. The  differences  in the results will be shown in the example. INTO [ obj1, obj2 ... ] : We can select fields in relation to a given variable. For example, if we want to select the  carrid  and  connid  fields, we can select these fields directly in relation to a variable instead of a structure or table. INTO TABLE : This is the same as  INTO , but we can use a table rather than structure and we can also select more than one row. INTO CORRESPONDING FIELDS OF TABLE : This is the same as  INTO CORRESPONDING FIELDS OF , but we can select more than one row here, and we need to use the table as an internal variable where we can ...
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