在Oracle中使用from_tz时避免夏令时造成的异常-Mysql Tutorial-php.cn

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在Oracle中使用from_tz时避免夏令时造成的异常

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Jun 07, 2016 pm 04:59 PM

Oracle 中的from_tz函数，可以将一个timstamp和timzone拼成一个timestamp with timezoneSql代码 SQLgt; select from_tz(to_time

Oracle 中的from_tz函数，可以将一个timstamp和timzone拼成一个timestamp with timezone

Sql代码

FROM_TZ(TO_TIMESTAMP('20090102

SQL> select from_tz(to_timestamp('20090102','YYYYMMDD'), 'America/Sao_Paulo') from dual; FROM_TZ(TO_TIMESTAMP('20090102 -------------------------------------------------------------------------------- 02-1月 -09 12.00.00.000000000 上午 AMERICA/SAO_PAULO

但如果这个timestamp在指定的时区内不存在(比如由于夏令时，时钟往前拨了一个小时），就会抛Exception

Sql代码

ORA-01878: 在日期时间或间隔中没有找到指定的字段

SQL> select from_tz(to_timestamp('20091101','YYYYMMDD'), 'America/Sao_Paulo') from dual; select from_tz(to_timestamp('20091101','YYYYMMDD'), 'America/Sao_Paulo') from dual ORA-01878: 在日期时间或间隔中没有找到指定的字段

解决办法嘛，，先取出时区的offset，用其构建好timestamp with timezone后再转回指定的时区就好了

Sql代码

FROM_TZ(TO_TIMESTAMP('20091101

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