oracle extract transform and loading resume

Result F) Extracting date from user input ORDER BY year DESC, month Code language: SQL (Structured Query Language) ( sql ) The following statement uses the EXTRACT() function to extract the year and month from the order date and return the number of orders per month: SELECT EXTRACT( year FROM order_date) year, See the following orders table from the sample database: Result 23 Code language: SQL (Structured Query Language) ( sql )Įxtracting minutes from a timestamp: SELECT EXTRACT( MINUTE FROM TIMESTAMP ' 23:59:59.10' )Įxtracting seconds from a timestamp: SELECT EXTRACT( SECOND FROM TIMESTAMP ' 23:59:59.10' )Ĭode language: SQL (Structured Query Language) ( sql ) E) Extracting date components from table data Result 12 Code language: SQL (Structured Query Language) ( sql )Įxtracting day from a timestamp: SELECT EXTRACT( DAY FROM TIMESTAMP ' 23:59:59.10' )Įxtracting hours from a timestamp: SELECT EXTRACT( HOUR FROM TIMESTAMP ' 23:59:59.10' ) You can extract YEAR, MONTH, DAY, HOUR, MINUTE, and SECOND from a TIMESTAMP value as shown in the following examples:Įxtracting years from a timestamp: SELECT EXTRACT( YEAR FROM TIMESTAMP ' 23:59:59.10' )Įxtracting months from a timestamp: SELECT EXTRACT( MONTH FROM TIMESTAMP ' 23:59:59.10' ) The following example extracts the value of the month field from the interval: SELECT EXTRACT( MONTH FROM INTERVAL '5-2' YEAR TO MONTH )Ĭode language: SQL (Structured Query Language) ( sql ) C) Extracting fields from INTERVAL DAY TO SECOND valuesįor an INTERVAL DAY TO SECOND, you can extract DAY, HOUR, MINUTE, and SECOND, as shown in the following example:Įxtract day from an interval SELECT EXTRACT( DAY FROM INTERVAL '5 04:30:20.11' DAY TO SECOND )ĭual Code language: SQL (Structured Query Language) ( sql )Įxtract hours from an interval SELECT EXTRACT( HOUR FROM INTERVAL '5 04:30:20.11' DAY TO SECOND )Įxtract minutes from an interval SELECT EXTRACT( MINUTE FROM INTERVAL '5 04:30:20.11' DAY TO SECOND )Įxtract seconds from an interval SELECT EXTRACT( SECOND FROM INTERVAL '5 04:30:20.11' DAY TO SECOND )Ĭode language: SQL (Structured Query Language) ( sql ) D) Extracting fields from TIMESTAMP values The result is 5 Code language: SQL (Structured Query Language) ( sql ) To extract the value of the year field, you use the following statement: SELECT EXTRACT( YEAR FROM INTERVAL '5-2' YEAR TO MONTH ) Suppose you have the following interval: INTERVAL '5-2' YEAR TO MONTH Code language: SQL (Structured Query Language) ( sql ) To extract values of HOUR, MINUTE, and SECOND fields, you use TO_CHAR() function.įor example, to extract the hour, minute, and second of a current system date, you use the following statement: SELECTĬode language: SQL (Structured Query Language) ( sql ) B) Extracting fields from INTERVAL YEAR TO MONTH valuesįor the INTERVAL YEAR TO MONTH, you can extract only the YEAR and MONTH fields.

Similarly, you can extract the values of other fields as shown below:Įxtracting month from a date: SELECT EXTRACT( MONTH FROM TO_DATE( '3 15:30:20 ', 'DD-Mon-YYYY HH24:MI:SS' ) ) MONTH FROMĬode language: SQL (Structured Query Language) ( sql )Įxtracting day from a date: SELECT EXTRACT( DAY FROM TO_DATE( '3 15:30:20 ', 'DD-Mon-YYYY HH24:MI:SS' ) ) DAY FROM Here is the result: 1999 Code language: SQL (Structured Query Language) ( sql ) In this example, we used the TO_DATE() function to convert a date literal to a DATE value. SELECT EXTRACT( YEAR FROM TO_DATE( '3 15:30:20 ', 'DD-Mon-YYYY HH24:MI:SS' ) ) YEAR FROMĭUAL Code language: SQL (Structured Query Language) ( sql ) The following example extracts the value of the YEAR field from a DATE value. You can extract YEAR, MONTH, and DAY from a DATE value by using the EXTRACT() function. Examples A) Extracting fields from DATE values The EXTRACT() function returns the value of the field of the source. Note that the EXTRACT() function will return UNKNOWN if the combination of field and source result in ambiguity. The following table illustrates which fields you can extract from which value type. The source argument is a DATE, an INTERVAL, or a TIMESTAMP value from which a field is extracted. The field argument specifies the component to be extracted. The Oracle EXTRACT() function accepts two arguments: The following illustrates the syntax of the Oracle EXTRACT() function: EXTRACT(field FROM source)Ĭode language: SQL (Structured Query Language) ( sql ) Arguments The Oracle EXTRACT() function extracts a specific component (year, month, day, hour, minute, second, etc.,) from a datetime or an interval value.

Oracle extract transform and loading resume