Excel : sum of values depending of other values

What would be the equivalent Excel formula of this SQL query

SELECT SUM(a) FROM table WHERE b < 0;

A     B
----  ----
   1     0
   2    -1 
   3     4
   5    -3

>> 开发者_如何学Python7

---

Use the SUMIF function.

---

=SUMIF(B:B,"<0",A:A)

---

use SUMIFS(a1:a4,b1:b4,"<0") if values in A1:B4 range

---

Given:

Row#    A    B

3       1    0
4       2   -1
5       3    4
6       5   -3

=SUMIF(B3:B6; "<0"; A3:A6)