% This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.

**Example**

```esql
  FROM employees
| EVAL first_letter = SUBSTRING(first_name, 0, 1)
| STATS first_name=MV_SORT(VALUES(first_name)) BY first_letter
| SORT first_letter
```

| first_name:keyword | first_letter:keyword |
| --- | --- |
| [Alejandro, Amabile, Anneke, Anoosh, Arumugam] | A |
| [Basil, Berhard, Berni, Bezalel, Bojan, Breannda, Brendon] | B |
| [Charlene, Chirstian, Claudi, Cristinel] | C |
| [Danel, Divier, Domenick, Duangkaew] | D |
| [Ebbe, Eberhardt, Erez] | E |
| Florian | F |
| [Gao, Georgi, Georgy, Gino, Guoxiang] | G |
| [Heping, Hidefumi, Hilari, Hironobu, Hironoby, Hisao] | H |
| [Jayson, Jungsoon] | J |
| [Kazuhide, Kazuhito, Kendra, Kenroku, Kshitij, Kwee, Kyoichi] | K |
| [Lillian, Lucien] | L |
| [Magy, Margareta, Mary, Mayuko, Mayumi, Mingsen, Mokhtar, Mona, Moss] | M |
| Otmar | O |
| [Parto, Parviz, Patricio, Prasadram, Premal] | P |
| [Ramzi, Remzi, Reuven] | R |
| [Sailaja, Saniya, Sanjiv, Satosi, Shahaf, Shir, Somnath, Sreekrishna, Sudharsan, Sumant, Suzette] | S |
| [Tse, Tuval, Tzvetan] | T |
| [Udi, Uri] | U |
| [Valdiodio, Valter, Vishv] | V |
| Weiyi | W |
| Xinglin | X |
| [Yinghua, Yishay, Yongqiao] | Y |
| [Zhongwei, Zvonko] | Z |
| null | null |