Oracle预定作业-Log_Date和Req / Actual Start date之间不匹配

Question

问题是Oracle Scheduler作业的运行日志中的Log_Date和Req / Actual Start日期之间不匹配。

需要了解如何更新美国Azure South Central上托管的数据库上的Oracle Job之一的Log_Date更新，并将DBTIMEZONE设置为GMT。

下面是作业日志快照

        LOG_ID
        LOG_DATE
        REQ_START_DATE
        ACTUAL_START_DATE
        RUN_DURATION


        96702
        26-JUN-19 01.39.25.804899000 PM -05:00
        26-JUN-19 06.37.52.471922000 PM GMT
        26-JUN-19 06.37.52.473391000 PM GMT
        +00 00:01:33.000000


        96482
        25-JUN-19 11.31.14.066025000 PM -05:00
        26-JUN-19 04.30.00.904751000 AM GMT
        26-JUN-19 04.30.01.014012000 AM GMT
        +00 00:01:13.000000


        95660
        24-JUN-19 11.31.04.787380000 PM -05:00
        25-JUN-19 04.30.00.845154000 AM GMT
        25-JUN-19 04.30.00.902438000 AM GMT
        +00 00:01:04.000000


        94728
        23-JUN-19 11.31.03.340214000 PM -05:00
        24-JUN-19 04.30.00.784083000 AM GMT
        24-JUN-19 04.30.00.842146000 AM GMT
        +00 00:01:02.000000


        91642
        22-JUN-19 11.31.03.554800000 PM -05:00
        23-JUN-19 04.30.00.609575000 AM GMT
        23-JUN-19 04.30.00.780094000 AM GMT
        +00 00:01:03.000000


        88592
        21-JUN-19 11.31.08.583756000 PM -05:00
        22-JUN-19 04.30.00.442901000 AM GMT
        22-JUN-19 04.30.00.606949000 AM GMT
        +00 00:01:08.000000


        87786
        20-JUN-19 11.31.04.835657000 PM -05:00
        21-JUN-19 04.30.00.393889000 AM GMT
        21-JUN-19 04.30.00.440497000 AM GMT
        +00 00:01:04.000000

为什么时间戳同时存在差异，日志中写入的偏移量为-5。为什么不是格林尼治标准时间（GMT）时间？