Hi Shwetha,
Your flow in BLS Trx goes like this.
JCO action Block
Condition Block(To check if JCO call is success)
Repeater(To get each row of the Jco output)
Insert Qry Call( Your insert query to insert into SQL db).
Just pass each column value((whatever you need) of repeater to the insert query params.
So it just maps all rows values as you are using repeater which is nothing but a loop.
Hope this helps.
Regards,
Rao