Hàm TO_CHAR – Oracle/PLSQL

Let’s look at some Oracle TO_CHAR function examples and explore how to use the TO_CHAR function in Oracle/PLSQL.

Examples with Numbers

For example:

The following are number examples for the TO_CHAR function.

TO_CHAR(1210.73, '9999.9')
Result: ' 1210.7'

TO_CHAR(-1210.73, '9999.9')
Result: '-1210.7'

TO_CHAR(1210.73, '9,999.99')
Result: ' 1,210.73'

TO_CHAR(1210.73, '$9,999.00')
Result: ' $1,210.73'

TO_CHAR(21, '000099')
Result: ' 000021'

Examples with Dates

The following is a list of valid parameters when the TO_CHAR function is used to convert a date to a string. These parameters can be used in many combinations.

The following are date examples for the TO_CHAR function.

TO_CHAR(sysdate, 'yyyy/mm/dd')
Result: '2003/07/09'

TO_CHAR(sysdate, 'Month DD, YYYY')
Result: 'July 09, 2003'

TO_CHAR(sysdate, 'FMMonth DD, YYYY')
Result: 'July 9, 2003'

TO_CHAR(sysdate, 'MON DDth, YYYY')
Result: 'JUL 09TH, 2003'

TO_CHAR(sysdate, 'FMMON DDth, YYYY')
Result: 'JUL 9TH, 2003'

TO_CHAR(sysdate, 'FMMon ddth, YYYY')
Result: 'Jul 9th, 2003'

You will notice that in some TO_CHAR function examples, the format_mask parameter begins with "FM". This means that zeros and blanks are suppressed. This can be seen in the examples below.

TO_CHAR(sysdate, 'FMMonth DD, YYYY')
Result: 'July 9, 2003'

TO_CHAR(sysdate, 'FMMON DDth, YYYY')
Result: 'JUL 9TH, 2003'

TO_CHAR(sysdate, 'FMMon ddth, YYYY')
Result: 'Jul 9th, 2003'

The zeros have been suppressed so that the day component shows as "9" as opposed to "09".