diff --git a/mhd-bi/src/main/resources/mapper/biPlatformRealData/BiPlatformRealDataMapper.xml b/mhd-bi/src/main/resources/mapper/biPlatformRealData/BiPlatformRealDataMapper.xml
index d89473102..cc38955f3 100644
--- a/mhd-bi/src/main/resources/mapper/biPlatformRealData/BiPlatformRealDataMapper.xml
+++ b/mhd-bi/src/main/resources/mapper/biPlatformRealData/BiPlatformRealDataMapper.xml
@@ -19,8 +19,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             mb.WINDOW_NAME        AS platformId,
             CASE
                 WHEN mb.EXIT_TIME IS NOT NULL AND mb.ENTRY_TIME IS NOT NULL
-                THEN CAST(EXTRACT(MINUTE FROM (mb.EXIT_TIME - mb.ENTRY_TIME))
-                        + EXTRACT(HOUR FROM (mb.EXIT_TIME - mb.ENTRY_TIME)) * 60 AS BIGINT)
+                THEN CAST((mb.EXIT_TIME - mb.ENTRY_TIME) * 24 * 60 AS BIGINT)
                 ELSE 0
             END                  AS platformDuration,
             TO_CHAR(mb.CREATE_TIME, 'YYYY-MM-DD HH24:MI:SS') AS appointmentTime,