1.db2 中 指定日期字段 增加四个小时
select
CASE WHEN 20< SUBSTR(a.WL_START_TIME,9,10) or SUBSTR(a.WL_START_TIME,9,10) <24
THEN to_char(TIMESTAMP ( TIMESTAMP(a.WL_START_TIME))+4 HOUR,'yyyymmddhh24miss')
END
from M1_Y4.SA_Y4WG_RW0018 a where a.UNLOAD_END_TIME='20190103104048'