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找出varchar在MySQL中是否包含百分号？

2024-05-14 10:27:04 351

要在MySQL中找出包含百分号的varchar，可以使用LIKE运算符。语法如下-

SELECT * FROM yourTableName WHERE yourColumnName like '%|%%' escape '|';

为了理解上述语法，让我们创建一个表。创建表的查询如下-

mysql> create table FindPercentInVarcharDemo
   -> (
   -> Id int NOT NULL AUTO_INCREMENT,
   -> Words varchar(30),
   -> PRIMARY KEY(Id)
   -> );

使用insert命令插入一些带有％符号的记录。查询如下-

mysql> insert into FindPercentInVarcharDemo(Words) values('This is a My%SQL Program');

mysql> insert into FindPercentInVarcharDemo(Words) values('Java is an object oriented');

mysql> insert into FindPercentInVarcharDemo(Words) values('C# is also an object%oriented');

使用select语句显示表中的所有记录。查询如下-

mysql> select *from FindPercentInVarcharDemo;

以下是输出-

+----+-------------------------------+
| Id | Words                         |
+----+-------------------------------+
| 1  | This is a My%SQL Program      |
| 2  | Java is an object oriented    |
| 4  | C# is also an object%oriented |
+----+-------------------------------+
3 rows in set (0.00 sec)

以下是查询以找出varchar包含％符号。查询如下-

mysql> select *from FindPercentInVarcharDemo where Words like '%|%%' escape '|';

以下是仅显示带有％符号的值的输出-

+----+-------------------------------+
| Id | Words                         |
+----+-------------------------------+
| 1 | This is a My%SQL Program       |
| 4 | C# is also an object%oriented  |
+----+-------------------------------+
2 rows in set (0.00 sec)

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找出varchar在MySQL中是否包含百分号？

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