diff --git a/borg-backup.sh b/borg-backup.sh
index 56f41de..12d5e21 100755
--- a/borg-backup.sh
+++ b/borg-backup.sh
@@ -140,6 +140,14 @@ echo_wait(){
    fi
 }
 
+## - Check if a given array (parameter 2) contains a given string (parameter 1)
+## -
+containsElement () {
+   local e
+   for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
+   return 1
+}
+
 trim() {
     local var="$*"
     var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
@@ -312,14 +320,28 @@ BORG_LOG_FILE="${BORG_LOG_DIR}/borg-backup.log"
 
 if [[ -z "${DB_TYPE}" ]] ; then
    DB_TYPE="${DEFAULT_DB_TYPE}"
-elif [[ "${DB_TYPE,,}" = "mysql" ]] ; then
-   [[ -z "${MYSQL_CREDENTIALS}" ]] && MYSQL_CREDENTIALS="${DEFAULT_MYSQL_CREDENTIALS}"
-elif [[ "${DB_TYPE,,}" = "psql" ]] || [[ "${DB_TYPE,,}" = "postgresql" ]] || [[ "${DB_TYPE,,}" = "postgres" ]] ; then
-   [[ -z "${PSQL_SYSTEM_USER}" ]] && PSQL_SYSTEM_USER="${DEFAULT_PSQL_SYSTEM_USER}"
 else
-   fatal "Unknown DB_TYPE '${DB_TYPE}'."
+   # replace comma by blank sign
+   DB_TYPE=${DB_TYPE/,/ }
 fi
 
+declare -a db_type_arr=()
+
+for _db_type in ${DB_TYPE}; do
+   if [[ "${DB_TYPE,,}" = "psql" ]] || [[ "${DB_TYPE,,}" = "postgresql" ]] || [[ "${DB_TYPE,,}" = "postgres" ]] ; then
+       db_type_arr+=("postgresql")
+   else
+      db_type_arr+=("${_db_type,,}")
+   fi
+done
+
+if containsElement "mysql" "${db_type_arr[@]}" ; then
+   [[ -z "${MYSQL_CREDENTIALS}" ]] && MYSQL_CREDENTIALS="${DEFAULT_MYSQL_CREDENTIALS}"
+fi
+
+if containsElement "postgresql" "${db_type_arr[@]}" ; then
+   [[ -z "${PSQL_SYSTEM_USER}" ]] && PSQL_SYSTEM_USER="${DEFAULT_PSQL_SYSTEM_USER}"
+fi
 
 
 [[ -z "${BACKUP_DIRECTORIES}" ]] && BACKUP_DIRECTORIES="${DEFAULT_BACKUP_DIRECTORIES}"
@@ -428,7 +450,9 @@ if [[ -n "${DB_TYPE}" ]] && [[ "${DB_TYPE,,}" = "!none" ]]; then
    blank_line
 fi
 
-if [[ "${DB_TYPE,,}" = "mysql" ]] ; then
+if containsElement "mysql" "${db_type_arr[@]}" ; then
+
+   blank_line
 
    echononl "Create an array of MySQL databases."
 
@@ -490,8 +514,11 @@ EOF
       fi
 
    done
+fi
 
-elif [[ "${DB_TYPE,,}" = "psql" ]] || [[ "${DB_TYPE,,}" = "postgresql" ]] || [[ "${DB_TYPE,,}" = "postgres" ]] ; then
+if containsElement "postgresql" "${db_type_arr[@]}" ; then
+
+   blank_line
 
    echononl "Create an array of PostgreSQL databases."
 
@@ -551,6 +578,8 @@ EOF
 
 fi
 
+blank_line
+
 
 echononl "Create borg backup.."