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diff --git a/src/main/java/org/onap/aai/sa/searchdbabstraction/searchapi/GroupByAggregation.java b/src/main/java/org/onap/aai/sa/searchdbabstraction/searchapi/GroupByAggregation.java
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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017 Amdocs
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.onap.aai.sa.searchdbabstraction.searchapi;
+
+/**
+ * An example of a date_range aggregation:
+ *
+ * <p><pre>
+ * {
+ *    "aggs": {
+ *        "my_group": {
+ *            "term": {
+ *                "field": "group"
+ *            }
+ *        }
+ *    }
+ * }
+ * </pre>
+ *
+ * @author sye
+ */
+public class GroupByAggregation extends AbstractAggregation {
+
+  @Override
+  public String toElasticSearch() {
+    StringBuilder sb = new StringBuilder();
+
+    sb.append("\"terms\": {\"field\": \"");
+    sb.append(field);
+    sb.append("\"");
+    if (size != null) {
+      sb.append(", \"size\": ");
+      sb.append(size);
+    }
+
+    if (minThreshold != null) {
+      sb.append(", \"min_doc_count\": ").append(minThreshold);
+    }
+
+    sb.append("}");
+
+    return sb.toString();
+  }
+
+  @Override
+  public String toString() {
+    return "{group-by: {field: " + field + ", size: " + size
+        + " minThreshold: " + minThreshold + "}}";
+  }
+
+}