java - 无法在 SQL Server 2008 R2 上执行(删除)查询

Question

我想删除数据库中包含 .jpg 扩展名的 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出现任何错误，但它也不会删除行!请有人告诉我我做错了什么!!!

示例 URL 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

从您的示例 URL 中我看到该模式是:

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

问题是你做得正确，但模式应该是这样的:

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){
}

去做吧，一定会对你有帮助!