| # Task: 006 |
|
|
| **Database:** retails |
|
|
| ## Question |
| Count number of suppliers with negative balance or located in Africa and do not supply Brand#32. |
|
|
|
|
| ## Gold Query |
|
|
| ```sql |
| WITH negative_balance_suppliers AS ( |
| SELECT s.s_suppkey |
| FROM supplier s |
| WHERE s.s_acctbal < 0 |
| ) |
| , africa_suppliers AS ( |
| SELECT DISTINCT s.s_suppkey |
| FROM supplier s |
| JOIN nation n ON s.s_nationkey = n.n_nationkey |
| JOIN region r ON n.n_regionkey = r.r_regionkey |
| WHERE r.r_name = 'AFRICA' |
| ) |
| , brand_32_suppliers AS ( |
| SELECT DISTINCT s.s_suppkey |
| FROM supplier s |
| JOIN partsupp ps ON s.s_suppkey = ps.ps_suppkey |
| JOIN part p ON ps.ps_partkey = p.p_partkey |
| WHERE p.p_brand = 'Brand#32' |
| ) |
| SELECT COUNT(DISTINCT s.s_suppkey) |
| FROM supplier s |
| WHERE ( |
| s.s_suppkey IN (SELECT s_suppkey FROM negative_balance_suppliers) |
| OR |
| s.s_suppkey IN (SELECT s_suppkey FROM africa_suppliers) |
| ) AND s.s_suppkey NOT IN (SELECT s_suppkey FROM brand_32_suppliers); |
| ``` |
|
|
| **Execution Result:** |
|
|
| | COUNT(DISTINCT s.s_suppkey) | |
| |-------------------------------| |
| | 124 | |
| |
| *1 rows* |
