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doc-exports/docs/dli/sqlreference/dli_spark_daydayofmonth.html
Su, Xiaomeng 76a5b1ee83 dli_sqlreference_20240227 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
2024-03-27 22:02:33 +00:00

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day/dayofmonth

This function is used to return the day of a specified date.

Syntax

day(string date), dayofmonth(string date)

Parameters

Table 1 Parameter

Parameter

Mandatory

Type

Description

date

Yes

DATE

or

STRING

Date that needs to be processed

The following formats are supported:

  • yyyy-mm-dd
  • yyyy-mm-dd hh:mi:ss
  • yyyy-mm-dd hh:mi:ss.ff3

Return Values

The return value is of the INT type.

  • If the value of date is not of the DATE or STRING type, the error message "data type mismatch" is displayed.
  • If the value of date is of the DATE or STRING type but is not in one of the supported formats, NULL is returned.
  • If the value of date is NULL, NULL is returned.

Example Code

The value 1 is returned.

select day('2023-08-01');

The value NULL is returned.

select day('20230816');

The value NULL is returned.

select day(null);
Parent topic: Date Functions