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-->Summary
The Text() extractor supports a variety of text file formats that all follow a row/column format. It provides a set of delimiters to identify the row and column boundaries and several other parameters to parse the text file and produces a rowset based on the EXTRACT expression’s schema.
See Extractor Parameters (U-SQL) for supported parameters and their defaults values.
Examples
- The examples can be executed in Visual Studio with the Azure Data Lake Tools plug-in.
- The examples below use the sample data provided with your Data Lake Analytics account. See Prepare source data for additional information.
See Also
The PostgreSQL
EXTRACT()
function retrieves a field such as a year, month, and day from a date/time value.![Text Text](https://trackspecmotorsports.com/media/catalog/product/cache/1/thumbnail/9df78eab33525d08d6e5fb8d27136e95/i/m/img_4854.jpg)
Syntax
The following illustrates the syntax of the
EXTRACT()
function:Arguments
The PostgreSQL
EXTRACT()
function requires two arguments:1)
field
The field argument specifies which field to extract from the date/time value.
The following table illustrates the valid field values:
2)
source
The
source
is a value of type TIMESTAMP
or INTERVAL
. If you pass a DATE
value, the function will cast it to a TIMESTAMP
value.Return value
The
EXTRACT()
function returns a double precision value.Examples
A) Extracting from a TIMESTAMP examples
Extracting year from a timestamp:
Here is the result:
![Text Text](https://martinmitrevski.files.wordpress.com/2019/06/screenshot-2019-06-16-at-16.28.48.png)
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Extracting the quarter from a timestamp:
The result is
Extracting month from a timestamp:
The following is the result:
Extracting day from a timestamp: Barcode 1 10 – professional barcode generation software.
Here is the result:
31
31
Extracting century from a timestamp:
It returned 21 as expected:
Extracting decade from a timestamp:
The following is the result:
Extracting the day of week from a timestamp:
The result is:
Extracting the day of year from a timestamp:
It returned 366:
Extracting the epoch from a timestamp:
The result is:
Extracting hour from a timestamp:
Result:
Extracting the minute from a timestamp:
Here is the result:
Extracting second from a timestamp:
The result includes second and its fractional seconds:
Extracting the weekday according to ISO 8601:
Extracting the millisecond from a timestamp:
The result is 15 * 1000 = 15000
Extracting the microseconds from a timestamp:
The result is 15 * 1000000 = 15000000
B) Extracting from an interval examples
Extracting year from an interval:
Result
Extracting the quarter from an interval:
Result
Extracting the month from an interval:
Result
Extracting the day from an interval:
Result
Extracting the hour from an interval:
Result
Extracting the minute from an interval:
Result
Extracting the second from an interval:
Result
Extracting the millisecond from an interval:
Result
Extracting the microsecond from an interval:
Result
Extracting the decade from an interval:
Result
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Extracting the millennium from an interval:
Result
Extracting the century from an interval:
Result
In this tutorial, you have learned how to extract a field from a date/time or interval value.