After completing this lesson, you should be able use the following datetime functions: TZ_OFFSET CURRENT_DATE CURRENT_TIMESTAMP LOCALTIMESTAMP DBTIMEZONE SESSIONTIMEZONE EXTRACT FROM_TZ TO_TIMESTAMP TO_TIMESTAMP_TZ TO_YMINTERVAL | Oracle9i Datetime Functions Schedule: Timing Topic 30 minutes Lecture 20 minutes Practice 50 minutes Total Objectives After completing this lesson, you should be able use the following datetime functions: TZ_OFFSET CURRENT_DATE CURRENT_TIMESTAMP LOCALTIMESTAMP DBTIMEZONE SESSIONTIMEZONE EXTRACT FROM_TZ TO_TIMESTAMP TO_TIMESTAMP_TZ TO_YMINTERVAL Lesson Aim This lesson addresses some of the datetime functions introduced in Oracle9i. TIME ZONES -08:00 The image represents the time for each time zone when Greenwich time is 12:00. -05:00 +02:00 +10:00 +07:00 Time Zones In Oracle9i, you can include the time zone in your date and time data, as well as provide support for fractional seconds. This lesson focuses on how to manipulate the new datetime data types included with Oracle9i using the new datetime functions. To understand the working of these functions, it is necessary to be familiar with the concept of time zones and Greenwich Mean Time, or GMT. Greenwich Mean Time, or GMT is now referred to as UTC (Coordinated Universal Time). The hours of the day are measured by the turning of the earth. The time of day at any particular moment depends on where you are. When it is noon in Greenwich, England, it is midnight along the international date line. The earth is divided into 24 time zones, one for each hour of the day. The time along the prime meridian in Greenwich, England is known as Greenwich mean time, or GMT. GMT is the time standard against which all other time zones in the world are referenced. It is the same all year round and is not effected by summer time or daylight savings time. The meridian line is an imaginary line that runs from the North Pole to the South Pole. It is known as zero longitude and it is the line from which all other lines of longitude are measured. All time is measured relative to Greenwich mean time (GMT) and all places have a latitude (their distance north or south of the equator) and a longitude (their distance east or west of the . | Oracle9i Datetime Functions Schedule: Timing Topic 30 minutes Lecture 20 minutes Practice 50 minutes Total Objectives After completing this lesson, you should be able use the following datetime functions: TZ_OFFSET CURRENT_DATE CURRENT_TIMESTAMP LOCALTIMESTAMP DBTIMEZONE SESSIONTIMEZONE EXTRACT FROM_TZ TO_TIMESTAMP TO_TIMESTAMP_TZ TO_YMINTERVAL Lesson Aim This lesson addresses some of the datetime functions introduced in Oracle9i. TIME ZONES -08:00 The image represents the time for each time zone when Greenwich time is 12:00. -05:00 +02:00 +10:00 +07:00 Time Zones In Oracle9i, you can include the time zone in your date and time data, as well as provide support for fractional seconds. This lesson focuses on how to manipulate the new datetime data types included with Oracle9i using the new datetime functions. To understand the working of these functions, it is necessary to be familiar with the concept of time zones and Greenwich Mean Time, or GMT. Greenwich Mean Time, or GMT is now .
