Number----char (to_char)

1mai numbermuri Muttchar (to_char)

A number is converted to a character type, and when the format is specified, the positive number will be used to store the previous'+'by one more byte.

SQL > select length (23), length (- 23) from dual

LENGTH (23) LENGTH (- 23)

--

2 3

SQL > select length (to_char (23)), length (to_char (- 23)) from dual

LENGTH (TO_CHAR (23) LENGTH (TO_CHAR (- 23))

--

2 3

SQL > select length (to_char (23 ~ (99'), length (to_char (- 23 ~ () from dual

LENGTH (TO_CHAR (23)) LENGTH (TO_CHAR (- 23))

-

3 3

Extra placeholders are supplemented with spaces

SQL > select length (to_char (23recoveryS99')), length (to_char (0pencil S99')) from dual

LENGTH (TO_CHAR (23meme STM9')) LENGTH (TO_CHAR (0pencil S99'))

-

3 3

You can display'+'by using'S'

SQL > select to_char (23penny S99'), to_char (- 23pencil S99') from dual

TO_CHAR (23penny S99') TO_CHAR (- 23penny S99')

--

SQL > select length (to_char (23recoveryTM9')), length (to_char (- 23recoveryTM9') from dual

LENGTH (TO_CHAR (23 ~ TM9')) LENGTH (TO_CHAR (- 23 ~ ())

2 3

TM minimum format output, which removes spaces and the preceding'+', just like without format parameters

SQL > select length (to_char (23recoveryTM9')), length (to_char (- 23recoveryTM9') from dual

LENGTH (TO_CHAR (23 ~ TM9')) LENGTH (TO_CHAR (- 23 ~ ())

2 3