Update getShopTopArea.md

@@ -20,11 +20,20 @@
 ### 对应SQL的操作库表
 
 ```xml 
-    <select id="selectShopTopArea">
-        select * from shop_top_area where rank<11 and shop_id=#{shopId,jdbcType=INTEGER} 
-                                                and date_id=#{dateId,jdbcType=INTEGER}
-        union all 
-        select * from shop_top_area where shop_id = -1 and date_id=#{dateId,jdbcType=INTEGER}
+ <select id="selectShopTopAreaByShopId" resultMap="BaseResultMap">
+        select
+              <include refid="Base_Column_List"/>
+        from shop_top_area
+        <where>
+            <if test="shopTopArea.shopId != null ">
+                and shop_id=#{shopTopArea.shopId,jdbcType=INTEGER}
+            </if>
+            <if test="shopTopArea.shopId != null ">
+                and date_id=#{shopTopArea.dateId,jdbcType=INTEGER}
+            </if>
+        </where>
+        order by order_rate desc
+        limit 10
  </select>
 ```