This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
i have a parent table: tbl_document, child table: tbl_attachment.
1)Currently when i do delete, it only delete the data from parent table.
2)When i do the update without attaching any attachment, the child will be update with null. but i want the child to actually not to do any update when no attachment is attached (which means it should be retaining its orginial values).