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MySQL查询从字段值中计数逗号？

2024-05-19 11:57:05 468

以下是语法-

select length(yourColumnName) - length(replace(yourColumnName, ',', '')) as anyAliasName from yourTableName;

让我们首先创建一个表-

create table DemoTable1510
   -> (
   -> Value varchar(50)
   -> );

使用插入命令在表中插入一些记录-

insert into DemoTable1510 values('20,35');
insert into DemoTable1510 values('45,67,89');
insert into DemoTable1510 values('90,97,101,190');

使用select语句显示表中的所有记录-

select * from DemoTable1510;

这将产生以下输出-

+---------------+
| Value         |
+---------------+
| 20,35         |
| 45,67,89      |
| 90,97,101,190 |
+---------------+
3 rows in set (0.00 sec)

这是从字段值中计数逗号的查询-

select length(Value) - length(replace(Value, ',', '')) as NumberOfComma from DemoTable1510;

这将产生以下输出-

+---------------+
| NumberOfComma |
+---------------+
|             1 |
|             2 |
|             3 |
+---------------+
3 rows in set (0.00 sec)

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MySQL查询从字段值中计数逗号？

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