update 首页数据看板

jsowell-pile/src/main/resources/mapper/pile/PileStationInfoMapper.xml

@@ -770,4 +770,20 @@
           and station_lng != ''
           and station_lat != ''
     </select>
+
+    <select id="getCityDeviceCount" resultType="com.jsowell.pile.vo.web.CityDeviceCountVO">
+        SELECT
+            CASE
+                WHEN address LIKE '%省%' AND address LIKE '%市%' THEN
+                    CONCAT(SUBSTRING_INDEX(SUBSTRING_INDEX(address, '省', -1), '市', 1), '市')
+                WHEN address LIKE '%市%' THEN
+                    LEFT(SUBSTRING_INDEX(address, '市', 1), 3)
+                ELSE '其他'
+            END AS cityName,
+            COUNT(*) AS deviceCount
+        FROM pile_station_info
+        WHERE del_flag = '0' AND address IS NOT NULL AND address != ''
+        GROUP BY cityName
+        ORDER BY deviceCount DESC
+    </select>
 </mapper>