如何找出 MySQL 中某個特定分數以上學生的記錄?
使用 WHERE 設定它並獲取分數高於特定分數的學生記錄。讓我們首先建立一個表 -
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記錄 -
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 語句從表中顯示所有記錄 -
mysql> select *from DemoTable;
輸出
這將產生以下輸出 -
+----+-------------+--------------+ | Id | StudentName | StudentScore | +----+-------------+--------------+ | 1 | John | 43 | | 2 | Sam | 48 | | 3 | Chris | 33 | | 4 | Robert | 89 | +----+-------------+--------------+ 4 rows in set (0.00 sec)
以下是獲取分數高於 45 分的學生記錄的查詢 -
mysql> select StudentName from DemoTable where StudentScore > 45;
輸出
這將產生以下輸出 -
+-------------+ | StudentName | +-------------+ | Sam | | Robert | +-------------+ 2 rows in set (0.00 sec)
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