# 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*