您可以使用count(1)。首先让我们看一下语法-
select count(1) from yourTableName;
让我们首先创建一个表-
mysql> create table DemoTable ( StudentName varchar(100) );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable(StudentName) values('John Smith'); mysql> insert into DemoTable(StudentName) values('Chris Brown'); mysql> insert into DemoTable(StudentName) values('David Miller'); mysql> insert into DemoTable(StudentName) values('Carol Taylor');
使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
输出结果
+--------------+ | StudentName | +--------------+ | John Smith | | Chris Brown | | David Miller | | Carol Taylor | +--------------+ 4 rows in set (0.00 sec)
以下是获取表中的行数而不使用count(*)的查询-
mysql> select count(1) from DemoTable;
输出结果
+----------+ | count(1) | +----------+ | 4 | +----------+ 1 row in set (0.03 sec)