Question

我想删除数据库中包含.jpg扩展名所在的URL的所有行！

我正在使用

 try{
 java.sql.Statement mystat=connection.createStatement();
 String delete_jpg="DELETE FROM mytable WHERE mycol LIKE '%.jpg%' ";
 mystat.executeUpdate(delete_jpg);
 }catch(Exception e){
  }

使用Java JDBC执行此查询根本不会产生任何错误，但它也不会删除行！请有人告诉我，我做错了，请!!!

示例网址为：

 images/affiliation-logo4.png HTTP/1.1
 images/661.jpg HTTP/1.1
 footerslider/images/blue-left-arrow.png HTTP/1.1
 footerslider/images/blue-right-arrow.png HTTP/1.1
 media/contentHeader/32.jpg HTTP/1.1     //I want to delete this type of rows
 index.php?option=com_content&task=view&id=543 HTTP/1.1
 images/favic.ico HTTP/1.1
 src/ HTTP/1.0
 uiit/faculty.php?dept_id=31 HTTP/1.1
 uims/faculty.php?dept_id=32 HTTP/1.1
 media/profile/dhS1t8X.jpg HTTP/1.1     //I want to delete this type of rows
 media/profile/SSbkpgG.jpg HTTP/1.1     //I want to delete this type of rows

Answer 1

您可以尝试对您的陈述进行此修改：

String delete_jpg="DELETE FROM mytable WHERE mycol LIKE '%' + .jpg + '%' ";

Answer 2

从示例网址中我发现模式是：

 media/profile/dhS1t8X.jpg HTTP/1.1     //I want to delete this type of rows

问题在于你做得对，但模式应该是：

try{
 java.sql.Statement mystat=connection.createStatement();
 String delete_jpg="DELETE FROM mytable WHERE mycol LIKE '%.jpg %' ";  //HERE YOU HAVE TO ADD A WHITE SPACE AFTER THE .jpg as you can also seen in your sample URL!
 mystat.executeUpdate(delete_jpg);
}catch(Exception e){
}

做到这一点，肯定会帮到你！

无法在SQL Server 2008 R2上执行（DELETE）查询

2 个答案: