Important Formula

Difference Between Char And Varchar2. If you are dealing with single byte character set, then there is no difference between the two. A char datatype and varchar2 datatype are stored identically (eg:

The main difference is that varchar is. The word 'word' stored in a char(4) and a varchar2(4) consume exactly the same amount of space on. To summarize, char data type is usually used when the value of fixed size is ascertained;

Date To Char Oracle. If you omit fmt, then date is converted to a varchar2 value as follows. The dynamic rdbms stage uses to_date and to_char oracle sql functions to fetch data and write data for infosphere® datastage® date, time and timestamp data types.

Below is the syntax of the to_char() method in the oracle database, in this syntax datetime, must be as per the specified format. To_char is one of the vital conversion functions of oracle. The syntax goes like this: