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Here we discuss a what is Oracle EXTRACT(), with appropriate syntax and respective examples for better understanding.Excel Formula: Extract folder name from path

Oracle EXTRACT() function is very useful function for extracting information from DATE, TIMESTAMP or Interval_valueexpression.This function is used to bifurcate the DATE OR TIMESTAMP data type using component like month. While using EXTRACT function, take extra care about DATE and TIMESTAMP data type expression.The above EXTRACT function example shows that it’s very powerful function for extracting information from DATE, TIMESTAMP or Interval_valueexpression. SELECT Dtime, EXTRACT(month from dtime) Month,ĮXTRACT(Timezone_hourFROM Dtime) T_ZONE_HOUR,ĮXTRACT(Timezone_abbr FROM Dtime) T_ZONE_ABB It is very useful for splitting TIME or TIMESTAMP data into multiple columns as per requirement. In the above example, the EXTRACT function takes the Hour component and extractsHour information in 24 Hour format from the given expression i.e. SELECT Dtime, EXTRACT(Hour FROM DTIME) HOUR FROM Msg In the Msg table, Dtime column is a TIMESTAMP data type which contains time details with date and TIME_ZONE. EXTRACT() Function with TIMESTAMP Data Type So Extract function tries to extract the Hour but it couldn’t find Hour from the column data. The above SQL statement throws an error, WHY?īecause in the above EXTRACT function component is Hour but the expression or column is a DATE data type which does not store time information or data. SELECT DOJ, EXTRACT(Hour FROM DOJ) HOUR FROM Employee In the above example, EXTRACT function takes Year component and returns the numeric value of the Year in YYYY format from the given expression i.e. SELECT DOJ, EXTRACT(YEAR FROM DOJ) YEAR FROM Employee In the above example, EXTRACT function takes Month component and returns numeric value of the month from the given expression i.e. SELECT DOJ, EXTRACT(Month FROM DOJ) MONTH FROM Employee For that, we will use the below sample table (Employee&Msg) with 14 & 4records to understand the Oracle EXTRACT() function behavior. In this section, we’ll see the implementation of Oracle EXTRACT Function and its behavior. Implementations of EXTRACT() Function with Examples If component is TIMEZONE_HOUR, TIMEZONE_MINUTE, TIMEZONE_ABBR, TIMEZONE_REGION or TIMEZONE_OFFSETthenexpression datatype must be TIMESTAMP WITH TIME ZONE or TIMESTAMP WITH LOCAL TIME ZONE.In Oracle DATE data type does not store time or time field. If component is HOUR or MINUTE or SECOND then-expression datatype must be TIMESTAMP, TIMESTAMP WITH TIME ZONE, TIMESTAMP WITH LOCAL TIME ZONE, or INTERVAL DAY TO SECOND.

If a component is DAY then expression data type must be DATE, TIMESTAMP, TIMESTAMP WITH TIME ZONE, TIMESTAMP WITH LOCAL TIME ZONE, or INTERVAL DAY TO SECOND.If component is YEAR / MONTH then expression datatype must be DATE, TIMESTAMP, TIMESTAMP WITH TIME ZONE, TIMESTAMP WITH LOCAL TIME ZONE, or INTERVAL YEAR TO MONTH.It accepts component and based on it, extract value from the Date_time or Interval_valueexpression.

namespace: It is an optional parameter.Īs the extract function name suggests it’s a function which extracts some of the detail from the given expression or value.

‘xpath’: This is the path from where function extracts nodes details.

xml-type-instance: It is an object value.

This function used to select a node or set of nodes with its leaf node.

: It can be a DATE or TIMESTAMP or an INTERVAL value from which a field can be extracted using components.ĮXTRACT(xml-type-instance, 'xpath', 'namespace').

COMPONENT: It is listed above, it is to be extracted.

Hadoop, Data Science, Statistics & othersĮXTRACT(Component FROM )Ĭomponents are: Year, Month, Day, Hour, Minute, Second, Timezone_hour, Timezone_minute, Timezone_region, Timezone_abbr