调整请领单查询接口：按照create_time/update_time取最大后排序（把最新变更状态的单子放前面）

nursing-unit-invoicing/nu-invoicing-biz/src/main/java/com/nu/modules/qld/mapper/xml/NuInvoicingQldMainMapper.xml

@@ -47,11 +47,10 @@
             </if>
         </where>
         ORDER BY
-        CASE
+        GREATEST(
-        WHEN main.update_time IS NULL THEN 0
+        COALESCE(main.update_time, '1970-01-01 00:00:00'),
-        ELSE 1
+        COALESCE(main.create_time, '1970-01-01 00:00:00')
-        END ASC,
+        ) DESC,
-        COALESCE(main.update_time, '1970-01-01 00:00:00') DESC,
         main.create_time DESC
     </select>