triggers

问题 I am using EF with a SQL Server database. I created a view and an Instead Of Insert trigger for that view which looks like this: insert into Target (value, someFk) select value, 4 from inserted select id from Target where @@ROWCOUNT > 0 and id = scope_identity() I mapped the view into an EF edmx. When I try to add an entity I get the following exception when I call SaveChanges() : Unable to update the EntitySet 'TargetView' because it has a DefiningQuery and no element exists in the element

问题 If I run an insert query, but I have a trigger on a table to increment another value based upon the trigger, but there's something wrong with the trigger, will it still execute my query? 回答1: The following reference article should help. Basically, an error during either a BEFORE or AFTER trigger results in failure of the entire statement that caused trigger invocation. You shouldn't need to test this out, but if you wanted to quickly test this out, simple create a dummy table with a failed

问题 Can I check condition inside an event trigger? how can I do something like that using only XAML? <EventTrigger RoutedEvent="MouseDown"> <Trigger Property="IsPressed" Value="true"> <Setter Property = "Foreground" Value="Green"/> 回答1: Buttons and menu items have an IsPressed property that would work for you but other controls does. It is however easy to add an IsPressed property using some attached behavior. This will let you write XAML like this: <TextBlock Text="Hello" TriggerTest

问题 Can I check condition inside an event trigger? how can I do something like that using only XAML? <EventTrigger RoutedEvent="MouseDown"> <Trigger Property="IsPressed" Value="true"> <Setter Property = "Foreground" Value="Green"/> 回答1: Buttons and menu items have an IsPressed property that would work for you but other controls does. It is however easy to add an IsPressed property using some attached behavior. This will let you write XAML like this: <TextBlock Text="Hello" TriggerTest

问题 I called update query from table1 trigger, when that query runs, it updates other table2 successfully but update trigger of table2 is fired only 1 time means not for every record that was updated from query of update I'm using SQL Server 2008 Express edition- Please guide me where I am wrong 回答1: Finally got the anwser :/, Trigger fire once for single query execution. mass or bulk update/insert/delete will not awake trigger for every row :(, i really appreciate Mr. Markov & Mr. David Dubois,

问题 I am using Oracle 11gR2 on an Academic Assignment. There is a constraint which a room must have 3 - 5 people. I know that I can write a Trigger like this to check if a room has more than 5 people: CREATE TABLE People ( PID INTEGER PRIMARY KEY ); CREATE TABLE Room ( RID INTEGER PRIMARY KEY ); CREATE TABLE Living ( RID INTEGER, PID INTEGER, CONSTRAINT Living_PK PRIMARY KEY (RID, PID), CONSTRAINT Living_FK_RID FOREIGN KEY (RID) REFERENCES Room(RID), CONSTRAINT Living_FK_PID FOREIGN KEY (PID)

问题 This question already has answers here : UIScrollView, reaching the bottom of the scroll view (7 answers) Closed 6 years ago . I am making an application, just like Instagram, Path, etc. I need to know, trigger point, where, if the user scrolls to the bottom point and when it bounces, I need to make some calls. How do I get that trigger point? 回答1: Take a look at the UIScrollviewDelegate methods: http://developer.apple.com/library/ios/#documentation/uikit/reference/uiscrollviewdelegate

问题 im currently struggling with a jquery animation. its just a little animation to change height and opacity on scroll. the problem is, that the animation doesnt run fluently while i scroll. when i scroll really slow the animation does not finish in time. its like it pauses till i stop scrolling. jquery: $(window).scroll(function(){ if ($(window).scrollTop() > 0){ //$('#navigation').addClass('scroll'); $('#navigation').stop().animate({height: '92px'}); $('#navigation .bg').stop().animate(

问题 I am trying to create a trigger, so that when ever I add a new record it adds another record in the same table. The session field will only take values between 1 and 4. So when I add a 1 in session I want it to add another record but with session 3 blocked. But the problem is that it leads to cascading triggers and it inserts itself again and again because the trigger is triggered when inserted. I have for example a simple table: CREATE TABLE example ( id SERIAL PRIMARY KEY ,name VARCHAR(100)

问题 I want to use the same table data after deleting the data which fails in following method. The issue I faced is the latest change is not getting committed before the after trigger is completed. create table test_tbl(id_ number, type_ varchar2(100) , count_ number); create table test_count_tbl(type varchar2(100), count_ number) ; begin insert into test_tbl(id_ , type_ , count_ ) values (1,'type1', 10 ); insert into test_tbl(id_ , type_ , count_ ) values (2,'type1', 20 ); insert into test_tbl