--- /core/lib/Drupal/Core/Database/Connection.php
+++ /core/lib/Drupal/Core/Database/Connection.php
@@ -1153,7 +1153,11 @@
    */
   public function escapeTable($table) {
     if (!isset($this->escapedTables[$table])) {
-      $this->escapedTables[$table] = preg_replace('/[^A-Za-z0-9_.]+/', '', $table);
+      $escaped = preg_replace('/[^A-Za-z0-9_.-]+/', '', $table);
+      [$start_quote, $end_quote] = $this->identifierQuotes;
+      // Add quotes to every value between separators if it's present.
+      $this->escapedTables[$table] = strpos($escaped, '.') === FALSE ?
+        $escaped : $start_quote . str_replace('.', $end_quote . '.' . $start_quote, $escaped) . $end_quote;
     }
     return $this->escapedTables[$table];
   }