SQRT(a) 
SQRT(a) is an arithmetic function which calculates the square root of the expression a (a is a number).
a |
Result of the SQRT(a) Function |
|---|---|
a>0 |
Square root of a |
a=0 |
0 |
a<0 or a is a NULL value |
NULL value |
a is a special NULL value |
Special NULL value |