MySQL 如何在不使用count(*) 查询的情况下获取表格中的行数

您可以使用count(1)。首先让我们看一下语法−

select count(1) from yourTableName;

首先我们创建一个表格−

mysql> create table DemoTable
   (
   StudentName varchar(100)
   );
Query OK, 0 rows affected (0.84 sec)

使用insert语句向表格中插入一些记录−

mysql> insert into DemoTable(StudentName) values('John Smith');
Query OK, 1 row affected (0.24 sec)
mysql> insert into DemoTable(StudentName) values('Chris Brown');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(StudentName) values('David Miller');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable(StudentName) values('Carol Taylor');
Query OK, 1 row affected (0.15 sec)

使用select语句从表格中显示所有记录−

mysql> select *from DemoTable;

阅读更多：MySQL 教程

输出

+--------------+
| StudentName  |
+--------------+
| John Smith   |
| Chris Brown  |
| David Miller |
| Carol Taylor |
+--------------+
4 rows in set (0.00 sec)

以下是在不使用count(*)的情况下获取表格中行数的查询语句−

mysql> select count(1) from DemoTable;

输出

+----------+
| count(1) |
+----------+
| 4        |
+----------+
1 row in set (0.03 sec)