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Extracts year, month and day from a DATE, TIMESTAMP, or TIMESTAMPTZ value and combines them into an integer beginning with the four-digit year followed by the two-digit month followed by the two-digit day. TO_YYYYMMDD(<expression>) is equivalent to EXTRACT(YEAR FROM <expression>) * 10000 + EXTRACT(MONTH FROM <expression>) * 100 + EXTRACT(DAY FROM <expression>);

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Syntax

TO_YYYYMMDD(<expression>)

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Parameters

ParameterDescriptionSupported input types
<expression>The expression from which the time units are extracted.DATE, TIMESTAMP, TIMESTAMPTZ
TIMESTAMPTZ values are converted to local time according to the session’s time_zone setting before extracting the time units.

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Return Types

INT

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Remarks

The TO_YYYYMMDD function can be used in the PARTITION BY clause of CREATE TABLE commands. 
CREATE TABLE test (
  t TIMESTAMP
)
PARTITION BY TO_YYYYMMDD(t);

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Example

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