Summary of common methods in sap abap Development

1. During ABAP development, we often delete duplicate rows in the internal table. In this case, we need a very convenient statement: "delete adjacent duplicates from ", however, when using this statement, you should note that it deletes adjacent duplicate rows. We generally need to sort this statement through sort, for example:
Data: Begin of wa_pa0001,
Pernr like pa0001-pernr,
Uname like pa0001-uname,
Bukrs like pa0001-bukrs,
Plans like pa0001-plans,
End of wa_pa0001.
Data: itab_pa0001 like table of wa_pa0001 with header line. Sort itab_pa0001 by pernr.
Delete adjacent duplicates from itab_pa0001.2. in ABAP development, sometimes a time-consuming processing is required. In this case, you do not want to make the customer feel that the problem has been solved or that the computer crashes, and a prompt is given, "Please wait... you can use the following statement:
Call funcation 'sapgui _ progress_indicator'
Exporting
TEXT = 'processing data, please wait ...'.
"Time-consuming Processing
3. in ABAP development, sometimes we do Program You do not need to select all the required interfaces. For example:
Selection-screen begin of block BLK with frame title text-001.
Parameters: p_werks like mseg-werks. "material Credential-factory
Parameters: p_lgort like mseg-lgort obligatory. "material Credential-inventory location
Select-option: s_0000nr for mseg-0000nr. "material Credential-no.
Selection-screen end of BLK. in the screen selected p_lgort is required; s_mblnr is a range, in the OPEN-SQL can use in query range, if s_mblnr no data, take all, when there is data, take the data that meets the conditions; p_werks is a data value. When writing an SQL statement, we need to perform SQL spelling based on the conditions. Here we can use select-option to perform an operation, through the following statement
Select-option: s_werks for mseg-werks no-Extension No intervals. the range option and suffix option of select-option can be removed, but the problem is that "=, <=, <,>,> =" cannot be removed.