使用占位符进行模糊查询时,一定要将“%”放在参数值里面,不能放在sql里面。
例如:
1.SELECT * FROM User WHERE Name like %?%"
ps.setString(1,"刘")
错误
2.SELECT * FROM User WHERE Name like ?
ps.se…
mysql 中 find_in_set() 方法:
让我们先列举一个示例:
1. 测试代码:
2. CREATE TABLE test (
3. id int(8) NOT NULL auto_increment,
4. name varchar(255) NOT NULL,
5. list varchar(255) NOT NULL,
6. PRIMARY KEY (…
一、原题 You need to extract details of those products in the SALES table where the PROD_ID column contains the string _D123.Which WHERE clause could be used in the SELECT statement to get the required output?A. WHERE prod_id LIKE %_D123% ESCAPE _B. WHER…