如何在select语句中将oracle时间戳值从UTC转换为EST？
嗨，我有一个包含时间戳数据的日期字段（开放时间）。本栏中的时间以UTC为单位。我想选择该列并将其转换为EST，然后将其插入另一个表中。我希望它是原始时间戳时的EST（考虑基于日期、月份和年份的夏令时）。我一直在阅读oracle中的各种时区函数，但大多数似乎都专注于更改数据库的时区，我不需要这样做。（开放时间）字段始终以UTC记录如何在select语句中将oracle时间戳值从UTC转换为EST？,oracle,Oracle,嗨，我有一个包含时间戳数据的日期字段（开放时间）。本栏中的时间以UTC为单位。我想选择该列并将其转换为EST，然后将其插入另一个表中。我希望它是原始时间戳时的EST（考虑基于日期、月份和年份的夏令时）。我一直在阅读oracle中的各种时区函数，但大多数似乎都专注于更改数据库的时区，我不需要这样做。（开放时间）字段始终以UTC记录 BLUF：我需要选择一个根据UTC时间记录的时间戳字段（开放时间），并将其转换为当时的EST（开放时间）。谢谢。如果您将时间戳与时区一起使用数据类型： Oracle安装
BLUF：我需要选择一个根据UTC时间记录的时间戳字段（开放时间），并将其转换为当时的EST（开放时间）。谢谢。如果您将时间戳与时区一起使用数据类型： Oracle安装程序：
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
时间戳CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
如果将时间戳与时区一起使用数据类型： Oracle安装程序：
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
时间戳CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP WITH TIME ZONE
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP AT TIME ZONE 'UTC' );
SELECT open_time AT TIME ZONE 'UTC' AS utc,
open_time AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
CREATE TABLE Table_Name (
open_time TIMESTAMP
);
INSERT INTO Table_Name VALUES ( SYSTIMESTAMP );
SELECT CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'UTC' AS utc,
CAST( open_time AS TIMESTAMP WITH TIME ZONE ) AT TIME ZONE 'EST' AS est
FROM Table_Name;
UTC EST
----------------------------------- -----------------------------------
02-MAR-16 22.41.38.344809000 UTC 02-MAR-16 17.41.38.344809000 EST
奇妙的答案，非常感谢你花这么多时间把它整理得如此简洁。注意时区<代码> EST <代码>不考虑夏令时，尝试<代码>插入Table的名字值（SyistMeMeST+间隔6个月）在时区“UTC”）；代码>用于比较。使用地区名称，例如，
从…EST5EDT中选择时区“美国/东部”的开放时间，我正在使用此，根据我的检查，这是我想要的。谢谢<代码>选择I.DTMMOpenOpTimes，Fas-ZTZ（CAST（I.DTMPEOPEN时间戳），'0''）在DCC.事件I/Eng/<代码>时区“奇妙的答案”，非常感谢您花这么多时间把它整理得如此简洁。注意时区<代码> EST >代码>不考虑夏令时，尝试<代码>插入Table名称值（SYSTIMESTAMP+时区“UTC”的间隔“6”个月）用于比较。使用地区名称，例如，从…
或EST5EDT中选择时区“美国/东部”的开放时间，我正在使用此，根据我的检查，这是我想要的。谢谢<代码>从dcc.i的时区“美国/东部”的TZ（cast（i.dtm\U open\U time作为时间戳），“0:00”）中选择i.dtm\U open\U时间