MySQL 如何使用MySQL获取特定单词在列中出现的次数？

为此，你可以使用COUNT()函数。让我们首先创建一个表 –

mysql> create table DemoTable
   -> (
   -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> EmployeeName varchar(100)
   -> );
Query OK, 0 rows affected (0.62 sec)

使用插入命令将一些记录插入表中：

mysql> insert into DemoTable(EmployeeName) values('John');
Query OK, 1 row affected (0.21 sec)

mysql> insert into DemoTable(EmployeeName) values('Carol');
Query OK, 1 row affected (0.17 sec)

mysql> insert into DemoTable(EmployeeName) values('David');
Query OK, 1 row affected (0.14 sec)

mysql> insert into DemoTable(EmployeeName) values('Carol');
Query OK, 1 row affected (0.14 sec)

mysql> insert into DemoTable(EmployeeName) values('Carol');
Query OK, 1 row affected (0.29 sec)

mysql> insert into DemoTable(EmployeeName) values('Bob');
Query OK, 1 row affected (0.22 sec)

mysql> insert into DemoTable(EmployeeName) values('Sam');
Query OK, 1 row affected (0.12 sec)

使用选择语句显示表中的所有记录 –

mysql> select *from DemoTable;

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输出

这将产生以下输出 –

+------------+--------------+
| EmployeeId | EmployeeName |
+------------+--------------+
| 1 | John |
| 2 | Carol |
| 3 | David |
| 4 | Carol |
| 5 | Carol |
| 6 | Bob |
| 7 | Sam |
+------------+--------------+
7 rows in set (0.00 sec)

以下是获取MySQL中特定单词出现次数的查询。在这里，我们查找员工“Carol”的出现次数 –

mysql> select EmployeeName,count(EmployeeId) as Occurrence from DemoTable where
EmployeeName='Carol';

输出

这将产生以下输出：

+--------------+------------+
| EmployeeName | Occurrence |
+--------------+------------+
| Carol | 3 |
+--------------+------------+
1 row in set (0.05 sec)