How can I index the data in an array?

biz_tag data is

i want result data....

biz_tag: [
A, B, C, D, E

but... Actual Results

biz_tag: A

What's the problem???

Thank you...

화면 캡처 2021-04-20 161023


[biz_tag][0].... sorry...

But even if you modify it, it's not the result i want...

Is this how it comes out?

I found a way. Thank you.

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