无法在SQL Server 2008 R2上执行（删除）查询

Question

I want to delete all the rows in the data base that contain the URL in which .jpg extension comes!

I am using

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

Executing this query using Java JDBC gives no errors at all but it is not deleting the rows as well! Please can somebody tell me that what I'm doing wrong please!!!

Example URLs are:

 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

您可以尝试对语句进行以下修改：

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

Answer 2

As from your sample URLs I see that the pattern is:

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

The thing is that you're doing correctly but the pattern should be like:

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){
}

Do it and will definitely help you!