LIKE

语法说明

LIKE 操作符用于在 WHERE 子句中搜索列中的指定模式。

有两个通配符经常与LIKE操作符一起使用: * 百分号(%) 代表了0、1或多个字符。 * 下划线(_) 代表单个字符。

语法结构

1. > SELECT column1, column2, ...
2. FROM table_name
3. WHERE columnN LIKE pattern;

示例

1. > SELECT * FROM Customers
2. WHERE CustomerName LIKE 'a%'; //The following SQL statement selects all customers with a CustomerName starting with "a"

4. > SELECT * FROM Customers
5. WHERE CustomerName LIKE '%a'; //The following SQL statement selects all customers with a CustomerName ending with "a"

7. > SELECT * FROM Customers
8. WHERE CustomerName LIKE '%or%'; //The following SQL statement selects all customers with a CustomerName that have "or" in any position

10. > SELECT * FROM Customers
11. WHERE CustomerName LIKE '_r%'; //The following SQL statement selects all customers with a CustomerName that have "r" in the second position

13. > SELECT * FROM Customers
14. WHERE CustomerName LIKE 'a__%'; //The following SQL statement selects all customers with a CustomerName that starts with "a" and are at least 3 characters in length

16. > SELECT * FROM Customers
17. WHERE ContactName LIKE 'a%o'; //The following SQL statement selects all customers with a ContactName that starts with "a" and ends with "o"

19. > SELECT * FROM Customers
20. WHERE CustomerName NOT LIKE 'a%'; //The following SQL statement selects all customers with a CustomerName that does NOT start with "a"

限制

现不支持NOT LIKE语句。