exists

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How to detect page redirect with PHP?

I\'m trying to detect whether an image exists on a remote server. However, I\'ve tried several methods and can\'t get any of them to work.[详细]

2022-12-30 20:46 分类：问答
How to return a message from my repository class to my controller and then to my view in asp.net-mvc?

I use this for checking an existing emailId in my table and inserting it...It works fine how to show message to user when he tries to register with an existing mailId....[详细]

2022-12-30 18:26 分类：问答
Creating a MySQL trigger to verify data on another table

I am trying to set up a MySQL trigger that does the following: When someone inserts data into databaseA.bills, it ve开发者_如何学运维rifies if databaseB.bills already has that row, if it doesn\'t, t[详细]

2022-12-30 09:06 分类：问答
T-SQL: if exists always return true?

What do you think , does the Stored Procedure always return 1 ? I am concerned about the 开发者_JS百科if exists(..)[详细]

2022-12-29 17:20 分类：问答
How to find with javascript if element exists in DOM or it's virtual (has been just created by createElement)

I\'m looking for a way to find 开发者_Python百科if element referenced in javascript has been inserted in the document.[详细]

2022-12-28 12:12 分类：问答
If-exists-UPDATE-else-INSERT with Linq-to-Entities?

is there a way to write this same SQL atomic instruction using Entities and LinQ? IF EXISTS (SELECT * FROM MyTable WHERE ID = @Id)[详细]

2022-12-27 03:42 分类：问答
Union and If Exists - not working together - Please help

I need to get dummy values if they do no rows returned from table. The If exists works by itself, but gives error with a Union. Can someone please guide me with a solution or a workaround?[详细]

2022-12-26 06:23 分类：问答
Connect Chiba xForm to a restful web service (exist db)

I need to read an xml instance from an exist db. I am attempting to connect chiba to a restful web service via the following command:[详细]

2022-12-25 16:30 分类：问答
How do I reject if exists? for non-nested attributes?

Currently my controller lets a user submit muliple \"links\" at a time.It collects them into an array, creates them for that user, but catches any errors for the User to go back and fix. How can I ign[详细]

2022-12-25 03:43 分类：问答
Check if row already exists, if so tell the referenced table the id

Let\'s assume I have a table magazine: CREATE TABLE magazin开发者_Python百科e ( magazine_id integer NOT NULL DEFAULT nextval((\'public.magazine_magazine_id_seq\'::text)::regclass),[详细]

2022-12-22 22:21 分类：问答