diff --git a/Definitions/msnodesql-0.2.d.ts b/Definitions/msnodesql-0.2.d.ts
index 00ea8c950..a9ea2be4f 100644
--- a/Definitions/msnodesql-0.2.d.ts
+++ b/Definitions/msnodesql-0.2.d.ts
@@ -10,13 +10,35 @@ declare module "msnodesql" {
     export function open(connectionString: string, callback: Function): Connection;
 
     export function query(connectionString: string, query: string): StreamEvents;
-    export function query(connectionString: string, query: string, callback: Function): StreamEvents;
-    export function query(connectionString: string, query: string, params, callback: Function): StreamEvents;
+    export function query(connectionString: string, query: string, callback: Callback): StreamEvents;
+    export function query(connectionString: string, query: string, params, callback: Callback): StreamEvents;
 
     export function queryRaw(connectionString: string, query: string): StreamEvents;
-    export function queryRaw(connectionString: string, query: string, callback: Function): StreamEvents;
-    export function queryRaw(connectionString: string, query: string, params, callback: Function): StreamEvents;
+    export function queryRaw(connectionString: string, query: string, callback: Callback): StreamEvents;
+    export function queryRaw(connectionString: string, query: string, params, callback: Callback): StreamEvents;
 
-    interface Connection { }
-    interface StreamEvents extends EventEmitter  { }
+    interface Callback {
+        (err: Error, results: any[]): void;
+    }
+
+    interface Errback {
+        (err: Error): void;
+    }
+
+    interface Connection {
+        queryRaw(connectionString: string, query: string): StreamEvents;
+        queryRaw(connectionString: string, query: string, callback: Callback): StreamEvents;
+        queryRaw(connectionString: string, query: string, params, callback: Callback): StreamEvents;
+
+        query(connectionString: string, query: string): StreamEvents;
+        query(connectionString: string, query: string, callback: Callback): StreamEvents;
+        query(connectionString: string, query: string, params, callback: Callback): StreamEvents;
+
+        beginTransaction(callback?: Errback);
+        commit(callback?: Errback);
+        rollback(callback?: Errback);
+        close(callback?: Errback);
+    }
+
+    interface StreamEvents extends EventEmitter { }
 }
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