FLOAT(a,s) 
FLOAT(a,s) is an arithmetic function that outputs the expression a (a number) in a format of the data type FLOAT(s) (s is an unsigned integer). It is rounded to s places if necessary.
a, s |
Result of the FLOAT(a,s) function |
|---|---|
a is a NULL value |
NULL value |
a is a special NULL value |
Special NULL value |