在MySQL中查找超过特定分数的学生记录?
mysqlmysqli database更新于 2023/11/26 17:44:00
通过WHERE设置，获取超过特定分数的学生记录。我们首先创建一个表。 −
mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(100), -> StudentScore int -> ); Query OK, 0 rows affected (1.65 sec
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(StudentName,StudentScore) values('John',43);
Query OK, 1 row affected (0.81 sec)
mysql> insert into DemoTable(StudentName,StudentScore) values('Sam',48);
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(StudentName,StudentScore) values('Chris',33);
Query OK, 1 row affected (1.50 sec)
mysql> insert into DemoTable(StudentName,StudentScore) values('Robert',89);
Query OK, 1 row affected (0.27 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
这将产生以下输出 −
+----+-------------+--------------+ | Id | StudentName | StudentScore | +----+-------------+--------------+ | 1 | John | 43 | | 2 | Sam | 48 | | 3 | Chris | 33 | | 4 | Robert | 89 | +----+-------------+--------------+ 4 rows in set (0.00 sec)
下面是获取分数超过45分的学生记录的查询 −
mysql> select StudentName from DemoTable where StudentScore > 45;
输出
这将产生以下输出 −
+-------------+ | StudentName | +-------------+ | Sam | | Robert | +-------------+ 2 rows in set (0.00 sec)
