Hello,
for updating GET requests, use the same approach as described here
In this case, you may use foreach loop to send requests for all DB rows. Pseudocode:
List<GroovyRowResult> res = sql.getSelectResults('SELECT TOP 10 PERSONAL_ID, PHONE2 FROM CLIENTS WHERE PERSONAL_ID IS NOT NULL AND PHONE2 IS NOT NULL')
for(Map oneRow in res) {
String personalId = oneRow.get("PERSONAL_ID")
String phone = oneRow.get("PHONE2")
// use variables in the GET request here
}