e
返回自然对数函数的底数。
语法
E();
参数说明
无
返回值说明
返回值的数据类型为 DOUBLE。
示例
mysql> select e();
+-------------------+
| e() |
+-------------------+
| 2.718281828459045 |
+-------------------+
1 row in set (0.01 sec)
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