如何删除包含下划线单词(如 MONTH_JAN')的记录?
为此,您可以使用 LIKE 运算符。让我们先创建一个表 -
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(40), BornMonth varchar(40) ); Query OK, 0 rows affected (0.47 sec)
使用 insert 命令向表中插入一些记录 -
mysql> insert into DemoTable(Name,BornMonth) values('Chris','MONTH_DEC'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Name,BornMonth) values('Bob','MONTH_JAN'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(Name,BornMonth) values('Mike','MONTH_FEB'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(Name,BornMonth) values('David','MONTH_JAN'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Name,BornMonth) values('Carol','MONTH_MARCH'); Query OK, 1 row affected (0.16 sec)
使用 select 语句显示表中的所有记录 -
mysql> select *from DemoTable;
这将生成以下输出 -
+----+-------+-------------+ | Id | Name | BornMonth | +----+-------+-------------+ | 1 | Chris | MONTH_DEC | | 2 | Bob | MONTH_JAN | | 3 | Mike | MONTH_FEB | | 4 | David | MONTH_JAN | | 5 | Carol | MONTH_MARCH | +----+-------+-------------+ 5 rows in set (0.00 sec)
以下是删除基于单词的记录的查询 -
mysql> delete from DemoTable where BornMonth LIKE '%MONTH_JAN%'; Query OK, 2 rows affected (0.18 sec)
让我们再次检查表记录 -
mysql> select *from DemoTable;
这将生成以下输出 -
+----+-------+-------------+ | Id | Name | BornMonth | +----+-------+-------------+ | 1 | Chris | MONTH_DEC | | 3 | Mike | MONTH_FEB | | 5 | Carol | MONTH_MARCH | +----+-------+-------------+ 3 rows in set (0.00 sec)
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