For removing both leading and trailing spaces at once from a string by using LTRIM() and RTRIM() functions, we must have to use one function as an argument for other function. In other words, we must have to pass either LTRIM() function as an argument of RTIM() function or vice versa. It can be understood from the following example −
Example
Suppose we have a table ‘test_trim’ having a column ‘Name’ containing the values with leading and trailing spaces both −
mysql> Select * from test_trim;
+---------------+
| Name |
+---------------+
| Gaurav |
| Rahul |
| Aarav |
+---------------+
3 rows in set (0.00 sec)
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现在，以下查询将使用LTRIM()和RTRIM()函数一次性从名称中删除前导和尾随空格 −
mysql> Select Name, LTRIM(RTRIM(Name))AS 'Name Without Spaces' from test_trim;
+---------------+---------------------+
| Name | Name Without Spaces |
+---------------+---------------------+
| Gaurav | Gaurav |
| Rahul | Rahul |
| Aarav | Aarav |
+---------------+---------------------+
3 rows in set (0.00 sec)
mysql> Select Name, RTRIM(LTRIM(Name))AS 'Name Without Spaces' from test_trim;
+---------------+---------------------+
| Name | Name Without Spaces |
+---------------+---------------------+
| Gaurav | Gaurav |
| Rahul | Rahul |
| Aarav | Aarav |
+---------------+---------------------+
3 rows in set (0.00 sec)
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以上就是如何使用 MySQL LTRIM() 和 RTRIM() 函数同时删除字符串中的前导空格和尾随空格？的详细内容，更多请关注每日运维网(www.mryunwei.com)其它相关文章！
