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https://dbmstutorials.com/random_teradata/teradata-timestamp-difference.html
Note: Above logic can handle time difference for maximum of 9999 value for each day, hour, minute & second between 2 timestamp, if any of the value exceed 9999 then query will fail. Visit Teradata Date Functions if you want to learn more about date functions & Interval functions
https://forgetcode.com/Teradata/1228-Difference-between-TIMESTAMPS
The difference between two TIMESTAMP types is an Interval type. Consider a table like this: CREATE TABLE customer (phone_no CHARACTER(10) ,start_time TIMESTAMP(0) ,end_time TIMESTAMP(0)); The difference can be calculated with Interval unit DAY TO SECOND like below. SELECT (end_time - start_time) DAY(4) TO SECOND FROM customer;
https://stackoverflow.com/questions/51603061/how-to-calculate-duration-in-hours-in-teradata
If you want timestamp difference only in hours (ignoring minutes & Seconds) select ( (DateField1 - DateField2) HOUR (4))+ ( (TimeField1 - TimeField2) HOUR (4)) required_output from dateTable; And if you want timestamp difference considering hours,minutes & Seconds. SELECT (DateField1 - DateField2) HOUR (4) to SECOND (4) t1, (TimeField1 - …
https://docs.teradata.com/r/1DcoER_KpnGTfgPinRAFUw/40Mv8EtQJcdbd61GwnJBpw
Teradata Database calculates the interval difference between two DATE, TIME or TIMESTAMP values according to the ANSI SQL standard. Units smaller than the unit of the result are ignored when calculating the interval value. For example, when computing the difference in months for two DATE values, the day values in each ...
https://downloads.teradata.com/forum/database/subtracting-timestamps-as-decimals-hours
You can obtain the difference between two timestamps as hours with the following syntax: select (timestamp '2015-08-21 11:38:25' - timestamp '2015-08-05 09:32:54') hour(4) which returns INTERVAL HOUR(4) = " 386" which is a character value with length 5 (two leading spaces). The HOUR(4) data type can hold up to 9999 hours, which is 416 days.
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