Mysql中的逻辑运算【待完善】

1.代码如下：

mysql> select 1 or 0;
+----------+
| (1 or 0) |
+----------+
|        1 |
+----------+
1 row in set (0.01 sec)

mysql> select (0 or 0);
+----------+
| (0 or 0) |
+----------+
|        0 |
+----------+
1 row in set (0.00 sec)