大约有 44,000 项符合查询结果（耗时：0.0429秒） [XML]
How to delete an object by id with entity framework
It seems to me that I have to retrieve an object before I delete it with entity framework like below
9 Answers
...
Multiple Updates in MySQL
...t want that row to be inserted. what should id do? because i am fetching information from another site which maintains tables with id's. I am inserting values with respect to that id. if the site has new records then i will end up inserting only the ids and count except all other information. if and...
How to delete from select in MySQL?
This code doesn't work for MySQL 5.0, how to re-write it to make it work
4 Answers
4
...
MySQL foreign key constraints, cascade delete
I want to use foreign keys to keep the integrity and avoid orphans (I already use innoDB).
3 Answers
...
In Flux architecture, how do you manage Store lifecycle?
I'm reading about Flux but the example Todo app is too simplistic for me to understand some key points.
3 Answers
...
SQL RANK() versus ROW_NUMBER()
...
ROW_NUMBER : Returns a unique number for each row starting with 1. For rows that have duplicate values,numbers are arbitarily assigned.
Rank : Assigns a unique number for each row starting with 1,except for rows that have duplicate values,in which case the same...
How may I reference the script tag that loaded the currently-executing script?
... custom attribute to the script tag
id attribute may cause weird behaviour for scripts in some browsers for some edge cases
3. Select the script using a data-* attribute
Giving the script a data-* attribute will let you easily select it from within.
<script data-name="myscript">
var me = ...
Find the index of a dict within a list, by matching the dict's value
...
tom_index = next((index for (index, d) in enumerate(lst) if d["name"] == "Tom"), None)
# 1
If you need to fetch repeatedly from name, you should index them by name (using a dictionary), this way get operations would be O(1) time. An idea:
def bui...
PHP Session Fixation / Hijacking
...s is where an attacker explicitly sets the session identifier of a session for a user. Typically in PHP it's done by giving them a url like http://www.example.com/index...?session_name=sessionid. Once the attacker gives the url to the client, the attack is the same as a session hijacking attack.
T...
How to delete from multiple tables in MySQL?
...ND p.pet_id = :pet_id
...to delete only from pets_activities
See this.
For single table deletes, yet with referential integrity, there are other ways of doing with EXISTS, NOT EXISTS, IN, NOT IN and etc. But the one above where you specify from which tables to delete with an alias before the FR...