在 MySQL 中有沒有辦法選擇部分匹配的值?
要部分匹配,請使用 LIKE 運算子。我們先建立一個表 -
mysql> create table DemoTable806( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(100), StudentSubject varchar(100) ); Query OK, 0 rows affected (0.57 sec)
使用 insert 命令在表中插入一些記錄 -
mysql> insert into DemoTable806(StudentName,StudentSubject) values('Chris','Java in Depth With Data Structure');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable806(StudentName,StudentSubject) values('Robert','Introduction to MySQL');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable806(StudentName,StudentSubject) values('Bob','C++ in Depth With Data Structure And Algorithm');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable806(StudentName,StudentSubject) values('Adam','Introduction to MongoDB');
Query OK, 1 row affected (0.11 sec)使用 select 語句顯示錶中的所有記錄 -
mysql> select *from DemoTable806;
這將產生以下輸出 -
+-----------+-------------+------------------------------------------------+ | StudentId | StudentName | StudentSubject | +-----------+-------------+------------------------------------------------+ | 1 | Chris | Java in Depth With Data Structure | | 2 | Robert | Introduction to MySQL | | 3 | Bob | C++ in Depth With Data Structure And Algorithm | | 4 | Adam | Introduction to MongoDB | +-----------+-------------+------------------------------------------------+ 4 rows in set (0.00 sec)
以下是選擇部分匹配的值的查詢 -
mysql> select *from DemoTable806 where StudentSubject LIKE '%Depth%';
這將產生以下輸出 -
+-----------+-------------+------------------------------------------------+ | StudentId | StudentName | StudentSubject | +-----------+-------------+------------------------------------------------+ | 1 | Chris | Java in Depth With Data Structure | | 3 | Bob | C++ in Depth With Data Structure And Algorithm | +-----------+-------------+------------------------------------------------+ 2 rows in set (0.00 sec)
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