Use the MOD() function to divide the Amount values by 10 and then return the remainder from that division.

    
mysql> CREATE TABLE Test
    -> (
    ->     TestID SMALLINT NOT NULL PRIMARY KEY,
    ->     Amount SMALLINT NOT NULL
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql> INSERT INTO Test VALUES
    -> (101, 12),
    -> (102, 1),
    -> (103, 139),
    -> (104, -37),
    -> (105, 0),
    -> (106, -16);
Query OK, 6 rows affected (0.00 sec)
Records: 6  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql> SELECT TestID, Amount, MOD(Amount, 10) AS Modulo
    -> FROM Test
    -> ORDER BY TestID;
+--------+--------+--------+
| TestID | Amount | Modulo |
+--------+--------+--------+
|    101 |     12 |      2 |
|    102 |      1 |      1 |
|    103 |    139 |      9 |
|    104 |    -37 |     -7 |
|    105 |      0 |      0 |
|    106 |    -16 |     -6 |
+--------+--------+--------+
6 rows in set (0.00 sec)

mysql>
mysql>
mysql> drop table test;
Query OK, 0 rows affected (0.00 sec)

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Use the MOD() function to divide the Amount values by 10 and then return the remainder from that division. : MOD « Math « SQL / MySQL

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