Update querybuilder.md

Author: cpfiffer

docs/src/querybuilder.md

@@ -5,7 +5,7 @@ CurrentModule = Wasabi.QueryBuilder
 # QueryBuilder
 
 You can use QueryBuilder to create and execute a query in a simple and fast way.
-```
+```julia
 using Wasabi
 using SQLite
 
@@ -25,7 +25,7 @@ QueryBuilder supports select, join, where, limit, offset, group by and order by.
 
 Select can be expressed as vector of symbols or using SelectExpr object. If no arguments are passed to select then all fields of the model are selected. You can also use alias and select function like count, sum, avg and so on.
 
-```
+```julia
 QueryBuilder.from(User) |> QueryBuilder.select() # Select all fields from user model
 QueryBuilder.from(User) |> QueryBuilder.select([:id, :name]) # SELECT user_alias.id, user_alias.name FROM user user_alias
 QueryBuilder.from(User) |> QueryBuilder.select(User, :id, :total, :count) # SELECT COUNT(user_alias.id) AS total FROM user user_alias
@@ -35,15 +35,15 @@ Join are expressed using source, target, type (inner, outer ...), on, select.
 Here's an example to join User with UserProfile using an INNER JOIN and selecting the "bio" column from UserProfile .
 
 
-```
+```julia
 query = QueryBuilder.from(User) |> QueryBuilder.select() |> QueryBuilder.join(User, UserProfile, :inner, (:id, :user_id), [:bio])
 
 # SELECT user.id, user.name, user_profile.bio FROM "user" user INNER JOIN "user_profile" user_profile ON user.id = user_profile.user_id
 ```
 
 Where conditions are expressed as Julia Expr object where you can nest and/or conditions. The condition needs to be expressed as (Model, fieldname, function, params).
 
-```
+```julia
 query = QueryBuilder.from(User) |> QueryBuilder.select() |> QueryBuilder.where(:(or, (User, name, like, "%mattia%"), (User, id, in, [1, 2, 3]))) |> QueryBuilder.limit(1)
 sql, params = QueryBuilder.build(query)
 
@@ -57,4 +57,4 @@ Modules = [Wasabi.QueryBuilder]
 
 ```@autodocs
 Modules = [Wasabi.QueryBuilder]
-```
+```