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What is reference modification?
What is UNION in sql and syntax?
What is the difference between GDGS and VSAM? Which is
prefer one?
What is processing groups in endevor?

Question Posted / vinod


What is reference modification? What is UNION in sql and syntax? What is the difference between GD..

Answer / lu

reference modification is
when you move the position of this field to another field
ex : move ws (3:5) to wss(6:5)
3:5 means 3thrd position and the lenght is 5 ....
2) union in sql used to check the column (row) of the table
A existing or not in table B...
3) GDG is the generation of sequential file, u access only
by sequential, VSAM (KSDS) access by key if you know, it's
more faster...
in endevor : unit test, Qa, and Production...

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