如何使用 MySQL 修剪逗号?
mysqlmysqli database
修剪逗号的语法如下 −
SELECT TRIM(BOTH ',' FROM yourColumnName) from yourTableName;
让我们看一个例子 −
mysql> create table TrimCommasDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> AllTechnicalSkills text -> ); Query OK, 0 rows affected (0.81 sec)
现在，您可以使用 insert 命令在表中插入一些记录。查询如下 −
mysql> insert into TrimCommasDemo(AllTechnicalSkills) values(',C,C++,Java,');
Query OK, 1 row affected (0.14 sec)
mysql> insert into TrimCommasDemo(AllTechnicalSkills) values(',MySQL,SQL
Server,MongoDB,');
Query OK, 1 row affected (0.13 sec)
mysql> insert into TrimCommasDemo(AllTechnicalSkills) values(',Spring
Framework,Hibernate Framework,');
Query OK, 1 row affected (0.13 sec)
使用 select 语句显示表中的所有记录。查询如下 −
mysql> select *from TrimCommasDemo;
这是输出 −
+----+----------------------------------------+ | Id | AllTechnicalSkills | +----+----------------------------------------+ | 1 | ,C,C++,Java, | | 2 | ,MySQL,SQL Server,MongoDB, | | 3 | ,Spring Framework,Hibernate Framework, | +----+----------------------------------------+ 3 rows in set (0.00 sec)
以下是使用 MySQL 修剪前导和尾随逗号的查询 −
mysql> select TRIM(BOTH ',' FROM AllTechnicalSkills) from TrimCommasDemo;
这是输出 −
+----------------------------------------+ | TRIM(BOTH ',' FROM AllTechnicalSkills) | +----------------------------------------+ | C,C++,Java | | MySQL,SQL Server,MongoDB | | Spring Framework,Hibernate Framework | +----------------------------------------+ 3 rows in set (0.00 sec)
