MySQL TRIM()函数的作用是什么？

2024-05-01 05:50:12 397

语法

TRIM([{BOTH | LEADING | TRAILING} [str_to_remove] FROM] string)

这里，

参数BOTH表示要从字符串中删除的左右前缀。

LEADING参数表示只删除前导前缀。

TRAILING参数表示仅删除尾随前缀。

Str_to_remove是参数，表示要从字符串中删除的字符串。

字符串参数表示必须从中删除前缀的字符串。

示例

mysql> Select TRIM(BOTH '0' FROM '0100');
+----------------------------+
| TRIM(BOTH '0' FROM '0100') |
+----------------------------+
| 1                          |
+----------------------------+
1 row in set (0.00 sec)

mysql> Select TRIM(BOTH '**' from '**nhooo.com**');
+------------------------------------------------+
| TRIM(BOTH '**' from '**nhooo.com**')  |
+------------------------------------------------+
| nhooo.com                             |
+------------------------------------------------+
1 row in set (0.00 sec)

mysql> Select TRIM(Trailing '**' from '**nhooo.com**');
+----------------------------------------------------+
| TRIM(Trailing '**' from '**nhooo.com**')  |
+----------------------------------------------------+
| **nhooo.com                               |
+----------------------------------------------------+
1 row in set (0.00 sec)

mysql> Select TRIM(Leading '**' from '**nhooo.com**');
+---------------------------------------------------+
| TRIM(Leading '**' from '**nhooo.com**')  |
+---------------------------------------------------+
| nhooo.com**                              |
+---------------------------------------------------+
1 row in set (0.00 sec)

MySQL TRIM()函数的作用是什么？

语法

示例

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