Merge pull request #285 from vipulnsward/readme-edits

Readme fixes

1 files changed, 6 insertions, 5 deletions

diff --git a/README.markdown b/README.markdown
index 75b0b3ee0b..f12aa67498 100644
--- a/README.markdown
+++ b/README.markdown
@@ -160,7 +160,7 @@ products.
 
 #### Complex Joins
 
-Where Arel really shines in its ability to handle complex joins and aggregations. As a first example, let's consider an "adjacency list", a tree represented in a table. Suppose we have a table `comments`, representing a threaded discussion:
+Where Arel really shines is in its ability to handle complex joins and aggregations. As a first example, let's consider an "adjacency list", a tree represented in a table. Suppose we have a table `comments`, representing a threaded discussion:
 
 ```ruby
 comments = Arel::Table.new(:comments)
@@ -172,16 +172,17 @@ And this table has the following attributes:
 # [:id, :body, :parent_id]
 ```
 
-The `parent_id` column is a foreign key from the `comments` table to itself. Now, joining a table to itself requires aliasing in SQL. In fact, you may alias in Arel as well:
+The `parent_id` column is a foreign key from the `comments` table to itself.
+Joining a table to itself requires aliasing in SQL. This aliasing can be handled from Arel as below:
 
 ```ruby
 replies = comments.alias
 comments_with_replies = \
-  comments.join(replies).on(replies[:parent_id].eq(comments[:id]))
-# => SELECT * FROM comments INNER JOIN comments AS comments_2 WHERE comments_2.parent_id = comments.id
+  comments.join(replies).on(replies[:parent_id].eq(comments[:id])).where(comments[:id].eq(1))
+# => SELECT * FROM comments INNER JOIN comments AS comments_2 WHERE comments_2.parent_id = comments.id AND comments.id = 1
 ```
 
-This will return the first comment's reply's body.
+This will return the reply for the first comment.
 
 [Common Table Expresssions(CTE)](https://en.wikipedia.org/wiki/Common_table_expressions#Common_table_expression) support via: