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Select Create column in the search window toolbar, then select the Hour operation.

This operation can be applied with no arguments. In this case, you will get the duration representation of 1 hour (duration data type, 1h).

If you add the Timestamp argument, you will get the hours considering your current timezone. Optionally, you can add the Time zone argument to see the hours in the specified time zone.

Argument

Data type

Description

Timestamp mandatory

timestamp

You can either select a column with that data type or introduce it manually.

In case you want to introduce it, note that this value should be a date: Year-Month_Day Hour:Minute:Second.Millisecond (yyyy-MM-dd HH:mm:ss.SSS) → You can skip seconds and milliseconds.

Time zone

string

You need a valid string format the app can recognize so it returns meaningful results. If you leave the field empty or introduce a value the app cannot recognize, the default Time Zone is UTC. You can use one of the following methods:

  1. A time zone code→ UTC, PST, CST, etc. Check the full list here.

  2. The time zone database name → America/Los_Angeles, Europe/Amsterdam, Asia/Tokyo, etc. For the full list, see here.

  3. The full name of the time zone →  Universal Time Coordinated, Pacific Standard Time, Central Standard Time, etc. Check the full list here.

  4. The name of the region as it appears in Devo → Asia/Shanghai, Europe/Athens, America/New York, etc. You can check the time zone codes and region names in the Configure Timezone window in Devo.

Note

Be aware that some of the codes coincide, as CST could mean Central Standard Time or China Standard Time. In that case, it would be advisable to avoid using codes and introduce any of the other formats mentioned.


The data type of the new column values will be integer and the values shown will be 0-23.

Info

Be aware that timestamps taking place during summer will be affected in the time zones in which they set the clock forward during summer. For example, Europe/Madrid (CET-Central European Time), which is UTC+1, becomes UTC+2 during summertime and thus timestamps in August will be affected when using that time zone. Be also aware that summertime differs between the Northern and Southern Hemispheres.

Example

In the demo.ecommerce.data table, we want to create a column showing the hours of the dates in our eventdate column. To do it, we will create a new column using the Hour operation.

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  • The column shows 8 in the events that took place at that hour, regardless of the minute, second and millisecond, which corresponds to the hour shown in the eventdate column.

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Now we want to create a column in the demo.ecommerce.data table to show in EET time (Eastern European Time, UTC+2) the hours of the dates in our eventdate column. To do it, we will create a new column using the Hour operation.

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  • hour() → Use this expression to get the representation of one hour in duration data type (1h).

  • hour(timestamp)  → Use this expression to get the hours of the given timestamps, according to your current time zone.

  • hour(timestamp, timezone_string)  →  Use this expression to get the hours of the given timestamps, according to the specified time zone.

Example

You can copy the following LINQ script and try the previous examples on the demo.ecommerce.data table.

Code Block
from demo.ecommerce.data
  select hour(eventdate) as eventdate_hours

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