diff --git a/CRM/Contact/BAO/Query.php b/CRM/Contact/BAO/Query.php
index d5f91b64f69b..81a191cfa362 100644
--- a/CRM/Contact/BAO/Query.php
+++ b/CRM/Contact/BAO/Query.php
@@ -4734,14 +4734,14 @@ public static function appendAnyValueToSelect($selectClauses, $groupBy, $aggrega
    *  on full_group_by mode, then append the those missing columns to GROUP BY clause
    * keyword to select fields not present in groupBy
    *
-   * @param string $groupBy - GROUP BY clause where missing ORDER BY columns will be appended
+   * @param string $groupBy - GROUP BY clause where missing ORDER BY columns will be appended if not present
    * @param array $orderBys - ORDER BY sub-clauses
    *
    */
   public static function getGroupByFromOrderBy(&$groupBy, $orderBys) {
     if (!CRM_Utils_SQL::disableFullGroupByMode()) {
       foreach ($orderBys as $orderBy) {
-        $orderBy = str_replace(array(' DESC', ' ASC', '`'), '', $orderBy); // remove sort syntax from ORDER BY clauses if present
+        $orderBy = str_ireplace(array(' DESC', ' ASC', '`'), '', $orderBy); // remove sort syntax from ORDER BY clauses if present
         // if ORDER BY column is not present in GROUP BY then append it to end
         if (preg_match('/(MAX|MIN)\(/i', trim($orderBy)) !== 1 && !strstr($groupBy, $orderBy)) {
           $groupBy .= ", {$orderBy}";
@@ -4841,13 +4841,6 @@ public function searchQuery(
     $additionalFromClause = NULL, $skipOrderAndLimit = FALSE
   ) {
 
-    // In this case we are expecting the search query to return all the first single letter characters of contacts ONLY,
-    //  but when FGB (FULL_GROUP_BY_MODE) is enabled MySQL expect the columns present in GROUP BY must be present in SELECT clause
-    //  and that results into error and needless to have other columns. In order to resolve this disable FGB to fulfill both the cases
-    if ($sortByChar) {
-      CRM_Core_DAO::disableFullGroupByMode();
-    }
-
     if ($includeContactIds) {
       $this->_includeContactIds = TRUE;
       $this->_whereClause = $this->whereClause();
@@ -4895,6 +4888,16 @@ public function searchQuery(
         $limit = " LIMIT $offset, $rowCount ";
       }
     }
+    // Two cases where we are disabling FGB (FULL_GROUP_BY_MODE):
+    //   1. Expecting the search query to return all the first single letter characters of contacts ONLY, but when FGB is enabled
+    //      MySQL expect the columns present in GROUP BY, must be present in SELECT clause and that results into error, needless to have other columns.
+    //   2. When GROUP BY columns are present then disable FGB otherwise it demands to add ORDER BY columns in GROUP BY and eventually in SELECT
+    //     clause. This will impact the search query output.
+    $disableFullGroupByMode = ($sortByChar || !empty($groupByCols));
+
+    if ($disableFullGroupByMode) {
+      CRM_Core_DAO::disableFullGroupByMode();
+    }
 
     // CRM-15231
     $this->_sort = $sort;
@@ -4905,16 +4908,7 @@ public function searchQuery(
     list($select, $from, $where, $having) = $this->query($count, $sortByChar, $groupContacts, $onlyDeleted);
 
     if (!empty($groupByCols)) {
-      // It doesn't matter to include columns in SELECT clause, which are present in GROUP BY when we just want the contact IDs
-      if (!$groupContacts && !$sortByChar) {
-        $select = self::appendAnyValueToSelect($this->_select, $groupByCols, 'GROUP_CONCAT');
-      }
       $groupBy = " GROUP BY " . implode(', ', $groupByCols);
-      if (!empty($order)) {
-        // retrieve order by columns from ORDER BY clause
-        $orderBys = explode(",", str_replace('ORDER BY ', '', $order));
-        self::getGroupByFromOrderBy($groupBy, $orderBys);
-      }
     }
 
     if ($additionalWhereClause) {
@@ -4948,7 +4942,7 @@ public function searchQuery(
 
     $dao = CRM_Core_DAO::executeQuery($query);
 
-    if ($sortByChar) {
+    if ($disableFullGroupByMode) {
       CRM_Core_DAO::reenableFullGroupByMode();
     }