fix(): 客户培训日期增加判空 避免stateFlag统计错误

web-infrastructure/src/main/resources/mapper/TrainingUserMapper.xml

@@ -27,6 +27,7 @@
             from training_user
             <where>
                 delete_enum = 'false'
+                and start_time IS NOT NULL
                 <if test="params.phones != null">
                     and phone in
                     <foreach item="phone" collection="params.phones" open="(" separator="," close=")">