- Write a query identifying the type of each record in the
**TRIANGLES**table using its three side lengths. Output one of the following statements for each record in the table:

**Input Format:**

- The TRIANGLES table is described as follows:

- Each row in the table denotes the lengths of each of a triangle's three sides.

**Sample Input:**

**Sample Output:**

```
Isosceles
Equilateral
Scalene
Not A Triangle
```

**Explanation:**

- Values in the tuple (20,20,23) form an Isosceles triangle, because of A = B.
- Values in the tuple (20,20,20) form an Equilateral triangle, because of A = B = C.
- Values in the tuple (20,21,22) form a Scalene triangle, because of A ≠ B ≠ C.
- Values in the tuple (13,14,30) cannot form a triangle because the combined value of sides A and B is not larger than that of side C.

**Solution:**

```
/* Editor - MySQL */
SELECT
CASE
WHEN A+B>C AND B+C>A AND C+A>B THEN
CASE
WHEN A=B AND B=C THEN "Equilateral"
WHEN A=B OR B=C OR A=C THEN "Isosceles"
WHEN A<>B AND B<>C AND C<>A THEN "Scalene"
END
ELSE "Not A Triangle"
END
FROM TRIANGLES
```

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