How are dates written in Teradata?
Teradata Database exports dates in this numeric format if the current DateForm setting is set to IntegerDate….Numeric Date Validation.
| This raw date value … | Translates to this value … |
|---|---|
| 901201 | 1990-12-01 |
| 1001201 | 2000-12-01 |
| 19901201 | 3890-12-01 |
How is date stored in Teradata?
The Teradata RDBMS stores the date in YYYMMDD format on disk. The YYY is an offset value from the base year of 1900. The MM is the month value from 1 to 12 and the DD is the day of the month. Using this format, the database can currently work with dates beyond the year 3000.
What is current date Teradata?
Teradata’s CURRENT_DATE returns the current date at the time of submission of the query. If in case the CURRENT_DATE is invoked more than once, then the same date is returned the times CURRENT_DATE is being invoked. The date returned does not change during the entire duration when the request is being made.
How do I get weekday in Teradata?
Computing the day of the week for a given date is possible using the view sys_calendar. calendar (or join to it), thus: select day_of_week from sys_calendar.
What is the default date format in Teradata?
YYYY-MM-DD
By default, For ANSI dates, Teradata follows the date format as YYYY-MM-DD, whereas for the integer dates, the default date format is YY/MM/DD.
How do I change the date format in Teradata?
The take-away here is that in Teradata if you want to change the format of the date, you MUST use a cast statement so sometimes you’ll find yourself casting multiple times, plus Teradata has the tendency to gravitate to the default ‘YYYY-MM-DD’.
How does coalesce work in Teradata?
Teradata COALESCE is used for NULL handling. The COALESCE is a statement that returns the first non-null value of the expression. It returns NULL if all the arguments of the expression evaluate to NULL.
Why CAST is used in Teradata?
Teradata CAST Function The CAST function is one of the commonly used data type conversion functions. The CAST function allows you to perform run-time conversions between compatible data types. Syntax and the usage are similar to the CAST function of the other database.
What is first and last day in Teradata?
Teradata: First and Last Day. Teradata provides a way to truncate dates to the start of the week, month, quarter and year. This can achieved using inbuilt TRUNC function.
How to perform arithmetic operations on dates in Teradata?
Since the dates are stored as integer, you can perform some arithmetic operations on them. Teradata provides functions to perform these operations. EXTRACT function extracts portions of day, month and year from a DATE value. This function is also used to extract hour, minute and second from TIME/TIMESTAMP value.
What are the different types of date in Teradata?
Each date value contains the century, year, month, day, hour, minute, and second. Each RDBMS may employ different date functions, and there may also be differences in the syntax for each RDBMS even when the function call is the same. Teradata supports most of standard date functions that all other RDBMS supports.
How do I truncate a date in Teradata?
Teradata: First and Last Day Teradata provides a way to truncate dates to the start of the week, month, quarter and year. This can achieved using inbuilt TRUNC function. Syntax: TRUNC (date_column, Trunc_keyword)