When a parent-child (Head-detail) relationship exists for both parties, and Cascade is All-delete-orphan, the parent object has the following features:
1. When the parent object is saved or updated, Cascade saves or updates all associated child objects, equivalent to Cascade Save-update
2. When the parent object is deleted, Cascade deletes
Today we are dealing with a need to delete cookies. I added the query criteria to the cookie when I queried the page, so that the next time I had the query, I could bring the condition of the previous query. However, you need to delete all cookies when you switch the organization and log out.Here to illustrate the problem, just embed part of the Code @requestmapp
Delete all files in directory and directory * DEL_DIR (deleted path, 1 means delete directory data, 0 default delete this directory);
Delete all files in directory and directory* DEL_DIR (dele
Answer supplementYou can use the external command Delete to delete the object.
Replace "C: //" with your specified path to copy the following:CodeEnter notepadDelete the empty folder of drive C. Use rd to delete the folder. If you want to delete the folder in batches, use the Connection Symbol to
Method one, log in to the background of the dream, find the system and system settings->sql command line toolRun the following command, respectively:Clear the data in the table and delete all articles:TRUNCATE table ' dede_arctiny '; TRUNCATE table ' dede_archives '; TRUNCATE table ' dede_addonarticle ';Newly published article ID starting from 1:ALTER TABLE ' dede_arctype ' auto_increment = 1;Then publish t
Function code: Deletes only the files in the specified directory, and does not delete the directory folder.
The code is as follows
Copy Code
Class Shanchu {All files under the looping directoryfunction Delfileunderdir ($dirName = ". /smarty/templates/templates_c "){if ($handle = Opendir ("$dirName")) {while (false!== ($item = Readdir ($handle))) {if ($item!= "." $item!= "...")
--. SQL script-- The only note is that f: \ dropobj. SQL is the operated. SQL;-- Your computer does not have a drive F. Replace it with drive D or E.-- Used to delete all objects of the current user-- Use for drop all objects in current user;Set heading off;Set feedback off;Spool f: \ dropobj. SQL;Prompt -- delete Cons
{display:none} to assign it to the HeaderStyle, FooterStyle, and ItemStyle CssClass properties of the primary key. The primary key columns are not displayed at run time. You need to specify the primary key for the GridView control when you bind the data source:
Gridview1.datasource = ds. tables["Categories"];gridview1.datakeynames = new string[] {"CategoryID"};Gridview1.databind ();
It's easy to use:gridview1.datakeys[i]. Value.tostring (), which returns the primary key value, where I is the lin
How to delete all files in the directory (keep the top level directory)
I want to delete directories and files in a directory, but keep the most advanced directory. How to say, to delete all directories and files under/upload/, but keep the/upload directory.
The following fu
Phenomenon and background
Tip Hard disk space remaining 0 bytes, not when the event is selected to ignore, and want to resolve the "failure" by restarting. However, "reboot" failed to start successfully. There is a background to prompt the system update, I choose to update all, that is, the kernel upgrade to 3.19*61, the original is 3.19*25, as well as to crack Sony's binocular camera Ps4eye driver, may be related to "bug" (the remaining 0 bytes
Reason Analysis:This method is available when Web management cannot delete a primary volume.Solution:Command: Delete all-master-volumes
Description: Deletes all primary volumes associated with the specified snapshot pool. All schedules for this volume are also deleted.
Not
1. Recursively delete filesSuppose a folder below also have subfolders, delete the words will be error, this time to use a recursive way to delete all files in this file folder and foldersPackage Cn.itcast.digui;import java.io.file;/** * Recursive removal of all files contai
(Confirm ( " ") Are you sure you want to delete the selected data? ' ) ... { document.getElementById ( Btnshowid ). Click (); } }
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Here, just grab a control to touch the method "Select All" and "select" JS function
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Original post address: http://hi.baidu.com/liyanlin84/blog/item/eb306616cdb51e1c972b4389.html
Delete all data in the table, and you want to automatically increase the column from 1! Use truncate table tblname
Truncate is a SQL statement used to delete data table content. It is used as follows:Truncate table [Table name].The following describes the methods and
Command: Delete all-master-volumes
Description: Deletes all primary volumes associated with the specified snapshot pool. All schedules for this volume are also deleted.
Note: Before you delete a primary volume, you must first delete
If all DIY do not want to, manually empty the _common_block, _common_diy_data and _common_template_block table, and then delete all sub-folders under \data\diy\, to ensure that all your previous DIY clean , just like Disciz X, which has never been DIY.After the removal of DIY content, honestly first
A piece of code recursively deletes a department and all its sub-departments. For your reference only and for your future use, when deleting information, you need to delete all the information under this information. This requires recursive deletion. The following is a piece of code that recursively deletes a department and a
In the previous three articles, we described in detail
Python MySQL DatabaseThe creation and use of the method, but in practical problems, it is also necessary to
MySQL Delete all lists under library, this article, as an additional article in the previous three articles, to introduce
MySQL Deletes all the lists under the library.
Similar to deleting
thinkphp Clear Cache/Delete all files under folder
Today did a thinkphp to clear the cache function, on the internet opened a little bit of a simpler way of writing but that is a thinkphp built-in class, I found a half-day did not find this class, gas dead I have to use PHP to delete all files under the file this meth
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