Modify error test sql and data.

sharding-jdbc-core/src/test/resources/integrate/dataset/masterslave/expect/select/postgresql/SelectPagingWithOffsetAndRowCountSql.xml

 <dataset>
-    <t_order_item ORDER_BY_DERIVED_0="190002" item_id="190002" order_id="1900" user_id="19" status="init" />
-    <t_order_item ORDER_BY_DERIVED_0="190001" item_id="190001" order_id="1900" user_id="19" status="init" />
+    <t_order_item item_id="190002" order_id="1900" user_id="19" status="init" />
+    <t_order_item item_id="190001" order_id="1900" user_id="19" status="init" />
 </dataset>
 

sharding-jdbc-core/src/test/resources/sql/dql/select_group_by.xml

@@ -9,7 +9,7 @@
     <sql id="assertSelectOrderByDescWithGroupBy" value="SELECT SUM(order_id) AS orders_sum, user_id FROM t_order GROUP BY user_id ORDER BY orders_sum DESC" />
     <sql id="assertSelectCountWithoutGroupedColumn" value="SELECT count(*) as items_count FROM t_order o JOIN t_order_item i ON o.user_id = i.user_id AND o.order_id = i.order_id WHERE o.user_id IN (%s, %s) AND o.order_id BETWEEN %s AND %s GROUP BY o.user_id" />
     <sql id="assertSelectCountWithGroupByBindingTable" value="SELECT count(*) as items_count, o.user_id FROM t_order o JOIN t_order_item i ON o.user_id = i.user_id AND o.order_id = i.order_id WHERE o.user_id IN (%s, %s) AND o.order_id BETWEEN %s AND %s GROUP BY o.user_id ORDER BY o.user_id" />
-    <sql id="assertSelectWithGroupByAndLimit" value="SELECT user_id FROM t_order GROUP BY user_id LIMIT %s" type="H2,MySQL,PostgreSQL" />
+    <sql id="assertSelectWithGroupByAndLimit" value="SELECT user_id FROM t_order GROUP BY user_id ORDER BY user_id LIMIT %s" type="H2,MySQL,PostgreSQL" />
     <sql id="assertSelectWithGroupByAndOrderByAndLimit" value="SELECT user_id, SUM(order_id) FROM t_order GROUP BY user_id ORDER BY SUM(order_id) LIMIT %s" type="H2,MySQL,PostgreSQL" />
     <sql id="assertSelectGroupByWithAliasIsKeyword" value="SELECT SUM(order_id) AS orders_sum, user_id as `key` FROM t_order GROUP BY `key`" type="MySQL" />
 </sqls>