diff --git a/node_modules/loopback-connector/lib/sql.js b/node_modules/loopback-connector/lib/sql.js
index 28446f1..8710623 100644
--- a/node_modules/loopback-connector/lib/sql.js
+++ b/node_modules/loopback-connector/lib/sql.js
@@ -1260,6 +1260,10 @@ SQLConnector.prototype.buildFields = function(model, data, excludeIds) {
   return this._buildFieldsForKeys(model, data, keys, excludeIds);
 };
 
+SQLConnector.prototype.buildGroupBy = function(groupBy) {
+  return 'GROUP BY ' + groupBy.join(',');
+};
+
 /**
  * Build an array of fields for the database operation from data array
  * @param {String} model Model name
@@ -1447,7 +1451,26 @@ SQLConnector.prototype.buildSelect = function(model, filter, options) {
     }
   }
 
+  let extraSelect = '';
+  if (filter.sum) {
+    extraSelect = `SUM(${filter.sum}) as sumOf${filter.sum}, `;
+  }
+  if (filter.count) {
+    extraSelect += `COUNT(${filter.count}) as countOf${filter.count}, `;
+  }
+  if (filter.avg) {
+    extraSelect += `AVG(${filter.avg}) as avgOf${filter.avg}, `;
+  }
+  if (filter.min) {
+    extraSelect += `MIN(${filter.min}) as minOf${filter.min}, `;
+  }
+  if (filter.max) {
+    extraSelect += `MAX(${filter.max}) as maxOf${filter.max}, `;
+  }
+
+
   let selectStmt = new ParameterizedSQL('SELECT ' +
+    extraSelect +
     this.buildColumnNames(model, filter) +
     ' FROM ' + this.tableEscaped(model));
 
@@ -1456,7 +1479,9 @@ SQLConnector.prototype.buildSelect = function(model, filter, options) {
       const whereStmt = this.buildWhere(model, filter.where);
       selectStmt.merge(whereStmt);
     }
-
+    if (filter.groupBy) {
+      selectStmt.merge(this.buildGroupBy(filter.groupBy));
+    }
     if (filter.order) {
       selectStmt.merge(this.buildOrderBy(model, filter.order));
     }
@@ -1518,7 +1543,23 @@ SQLConnector.prototype.all = function find(model, filter, options, cb) {
     }
 
     const objs = data.map(function(obj) {
-      return self.fromRow(model, obj);
+      const object = self.fromRow(model, obj);
+      if (obj[`sumOf${filter.sum}`]) {
+        object[`sumOf${filter.sum}`] = obj[`sumOf${filter.sum}`];
+      }
+      if (obj[`countOf${filter.count}`]) {
+        object[`countOf${filter.count}`] = obj[`countOf${filter.count}`];
+      }
+      if (obj[`avgOf${filter.avg}`]) {
+        object[`avgOf${filter.avg}`] = obj[`avgOf${filter.avg}`];
+      }
+      if (obj[`minOf${filter.min}`]) {
+        object[`minOf${filter.min}`] = obj[`minOf${filter.min}`];
+      }
+      if (obj[`maxOf${filter.max}`]) {
+        object[`maxOf${filter.max}`] = obj[`maxOf${filter.max}`];
+      }
+      return object;
     });
     if (filter && filter.include) {
       self.getModelDefinition(model).model.include(