update about cte

Author: ahmad-moussawi

cte.md

@@ -1,7 +1,15 @@
 # Common Table Expression
-A common table expression (CTE) can be thought of as a temporary result set, it has some advantages over the sub query approach.
+A common table expression (CTE) can be thought of as a temporary result set
 
-In Sql, usually CTE is represented as a `with` clause.
+## Some notes about the CTE approach
+
+- CTE are easier to read
+Nested queries are hard to inspect, you have to undertand all the nested queries first, then go up to the main query, while in the CTE approach, the read process is more natural, from top to bottom.
+
+- Ability to overload existing tables
+You can overload existing tables this may help for testing purposes.
+
+In Sql, CTE is represented as a `with` clause.
 
 ## With
 To add a CTE to your query simply use the `With` method.
@@ -27,7 +35,7 @@ SELECT [Posts].*, [ActivePosts].[Count] FROM [Posts] INNER JOIN [ActivePosts] ON
 ```
 
 ## WithRaw
-You can use the `WithRaw` method if you want to pass an Sql Expression.
+You can use the `WithRaw` method if you want to pass a raw Sql Expression.
 
 ```cs
 var query = new Query("Posts")

index.md

@@ -18,6 +18,8 @@ It uses parameter binding technique to protect your application against SQL inje
 
 In addition to protection against SQL injection attacks, this technique speeds up your query execution by letting the SQL engine caches and reuses the same query plan even if the parameters are changed.
 
+<img src="./images/pic.jpg">
+
 ```cs
 IEnumerable<Post> posts = await db.Query("Posts")
     .Where("Likes", ">", 10)