# DIGITS scalar function

The DIGITS function returns a character-string representation of a number.

The schema is SYSIBM.

- expression
An expression that returns a value of one of the following built-in data types: SMALLINT, INTEGER, BIGINT, DECIMAL, CHAR, or VARCHAR. In a Unicode database, if a supplied argument is a GRAPHIC or VARGRAPHIC data type, it is first converted to a character string before the function is executed. A CHAR or VARCHAR value is implicitly cast to DECIMAL(31,6) before evaluating the function.

If the argument can be null, the result can be null; if the argument is null, the result is the null value.

- 5 if the argument is a small integer
- 10 if the argument is a large integer
- 19 if the argument is a big integer
*p*if the argument is a decimal number with a precision of*p*.

## Examples

*Example 1*: Assume that a table called TABLEX contains an INTEGER column called INTCOL containing 10-digit numbers. List all distinct four digit combinations of the first four digits contained in column INTCOL.**SELECT DISTINCT SUBSTR(DIGITS(**INTCOL**)**,1,4**)****FROM**TABLEX*Example 2*: Assume that COLUMNX has the DECIMAL(6,2) data type, and that one of its values is -6.28. Then, for this value:

returns the value '000628'.**DIGITS(**COLUMNX**)**The result is a string of length six (the precision of the column) with leading zeros padding the string out to this length. Neither sign nor decimal point appear in the result.