Filter and read data as per the condition

[hf14]

I want to read data for "cv"  for all IDs, but if "cv" data is not there then read for "st", then i will proceed with other operations.

The output should look like

[binu_acs]

@hf14 One way of doing this

[Luke_C]

Hi @hf14 

Here's one approach:

[Felipe_Ribeir0]

Hi @hf14  

One way of doing this