Update README

README.md

@@ -12,7 +12,7 @@ A `Schema` defines a vertex. It can be compared with `struct` in other programmi
 
 This is how a schema named `Person` can be defined.
 
-```
+```sql
 Schema Person {
     name string
     age  int
@@ -27,7 +27,7 @@ The names can be unicode letters. Each attribute has to be defined in a newline
 
 A `Vertex` is initialized from a `Schema`. It can be thought of as an `object` or `instance` of a `class` in other programming languages.
 
-```
+```sql
 Vertex Jintu Person {
     .name = "Jintu"
     .age  = 20
@@ -42,7 +42,7 @@ An `Edge` is a link between two `Vertex`s. It does not have its own properties (
 
 An `Edge` can be created from one of the predefined base edge. The base edges is like a schema but does not hold any attributes.
 
-```
+```sql
 Edge LivesIn OneWay
 ```
 
@@ -56,7 +56,7 @@ A relation binds two `Vertex`s with an `Edge`. If the edge type is `OneWay`, the
 
 Assuming `India` exist as a `Vertex`, you can write this:
 
-```
+```sql
 Relation LivesIn {
     Jintu India
 }
@@ -68,7 +68,7 @@ The combination of these entities gives you super-power to write complex graph q
 
 ## Find all `Person` who have a one degree friend
 
-```
+```sql
 Query Person {
     []FriendsWith Person
 }
@@ -78,7 +78,7 @@ Query Person {
 
 A `Vertex` can be aliased for referencing later. This allows defining recursive relations.
 
-```
+```sql
 Query Person as A { 
    .name = 'John'
    and []FriendsWith Person {
@@ -91,9 +91,9 @@ Query Person as A {
 
 `()` nodes matches with any vertex and `[]()` matches with any edge.
 
-```
+```sql
 Query Person as A { 
-   and Sum([]FriendsWith Person {
+   Sum([]FriendsWith Person {
        []() ()
    }, .salary) < .salary
 }
@@ -105,22 +105,22 @@ You can be explicit about it with `A.salary` though.
 
 ## Try to figure out the query below
 
-```p
+```sql
 Query Sum(Person as A {
-		.name = "Hi"
-		or (StartsWith(.name, 'H') and .age > 10)
-		and [1..2]LivesIn () {
-			[..]Within Country {
-				.name="India"
-				and []Within Continent
-			}
+    .name = "Hi"
+    or (StartsWith(.name, 'H') and .age > 10)
+    and [1..2]LivesIn () {
+        [..]Within Country {
+            .name="India"
+            and []Within Continent
+        }
+    }
+    and Sum([]FriendsWith Person {
+        []LivesIn () {
+            []Within Country{.name="USA"}
 		}
-		and Sum([]FriendsWith Person {
-			[]LivesIn () {
-				[]Within Country{.name="USA"}
-			}
-		}, .salary) < .salary
-	}, .age)
+	}, .salary) < .salary
+}, .age)
 ```
 
 The `[..]` syntax states that the edge can be there any number of times, including zero. The default `[]` evaluates to `[1]` to make the edge appear strictly once.