How can I index the data in an array?

[xo1534]

biz_tag data is
A,B,C,D,E

i want result data....

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

but... Actual Results

biz_tag: A

What's the problem???

Thank you...

[xo1534]

OMG.....

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

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

Is this how it comes out?

[xo1534]

I found a way. Thank you.