Answer / marek

It is used for blocking data base element (for example) for whole process of your report. For example you SELECT some data form db, and before MODIFY or UPDATE statement is a lot of code and it could take a while to execute – the data could be change by other program (or even the same run by other person).

A ways to avoid that is to use ENQUEUE and DEQUEUE items using a proper function module or using SELECT FOR UPDATE statement .

In Dialog Prog,i have created a screen and places one input/output box and named it was "A".In PBO i have given A=0 and In PAI A=1.when i run i program what i'll get and when i press enter(execute) wat i'll get output?

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