docs(querying): added examples for querying with operators (#8608)

docs/querying.md

@@ -93,6 +93,22 @@ Post.findAll({
 });
 // SELECT * FROM post WHERE authorId = 12 AND status = 'active';
 
+Post.findAll({
+  where: {
+    [Op.or]: [{authorId: 12}, {authorId: 13}]
+  }
+});
+// SELECT * FROM post WHERE authorId = 12 OR authorId = 13;
+
+Post.findAll({
+  where: {
+    authorId: {
+      [Op.or]: [12, 13]
+    }
+  }
+});
+// SELECT * FROM post WHERE authorId = 12 OR authorId = 13;
+
 Post.destroy({
   where: {
     status: 'inactive'
@@ -404,7 +420,7 @@ Subtask.findAll({
     // Will order by a nested associated model's created_at simple association objects.
     [{model: Task, as: 'Task'}, {model: Project, as: 'Project'}, 'createdAt', 'DESC']
   ]
-  
+
   // Will order by max age descending
   order: sequelize.literal('max(age) DESC')