Insert one line at a time into the database

I have a variable array that converted to string and it has 3 rows, when doing the insert in the database is passed all the data of the variable in a single line, have the possibility of inserting line by line?
for example if the variable has 3 rows insert into the database 3 rows of data and not a row with only all the data

After converting into Array, use For each activity,

For Each item in Array
      insert one item into Database, the following expression contains the value of array item

sorry, I could not understand, did you example already sent an example?

You can loop through items as karthik said, else you can convert array to datatable and use the INSERT activity.