fixed query syntax

sample-queries-tpch/tpch_query10.sql

@@ -28,5 +28,5 @@ group by
 	c_address,
 	c_comment
 order by
-	revenue desc;
+	revenue desc
 limit 20;

sample-queries-tpch/tpch_query2.sql

@@ -48,5 +48,5 @@ order by
 	s_acctbal desc,
 	n_name,
 	s_name,
-	p_partkey;
+	p_partkey
 limit 100;

sample-queries-tpch/tpch_query3.sql

@@ -19,5 +19,5 @@ group by
 	o_shippriority
 order by
 	revenue desc,
-	o_orderdate;
+	o_orderdate
 limit 10;

sample-queries-tpch/tpch_query4.sql

@@ -2,7 +2,7 @@ select
 	o_orderpriority,
 	count(*) as order_count
 from
-	orders
+	orders as o
 where
 	o_orderdate >= '1996-05-01'
 	and o_orderdate < '1996-08-01'
@@ -12,7 +12,7 @@ where
 		from
 			lineitem
 		where
-			l_orderkey = o_orderkey
+			l_orderkey = o.o_orderkey
 			and l_commitdate < l_receiptdate
 	)
 group by