triggers

问题 I have created a trigger which inserts the last record of conversation table in conversation_h table, and delete that record from conversation using before insert event. Any other logic or code is also welcome but i want achieve the above using trigger only. DELIMITER $$ CREATE TRIGGER `transfer_data` BEFORE INSERT ON `conversation` FOR EACH ROW BEGIN if (select count(*) from `conversation`) > 2 then set @mid = (select id from conversation order by id asc limit 0,1); insert into conversation

问题 In my table I have besides rest following fields Email UpperEmail I should create trigger which will populate UpperEmail field with Email value transformed to upper letters. How to do this? 回答1: Instead of having a separate column for UpperEmail, I would suggest that you create a computed column that does this. With a computed column, you would not need to use a trigger. Ex: Alter Table YourTableName Add UpperEmail As Upper(Email) 回答2: As an alternative solution, have you thought about

问题 Is possible to create or replace a view inside a trigger in Oracle? The view is created by joining 2 tables and one of them is the one updated by the trigger 回答1: Just to provide all options (however weird the idea of creating a view inside a trigger might be...) you can create a view in a trigger. Yes, an implicit COMMIT will follow, but if we make the trigger work in autonomous transaction, then the dynamic DDL will not fail. Using Luke Woodward's example: CREATE TABLE test (a integer);

问题 I have a rectange with several labels and images over it, and I have it so that when the user hovers their mouse over the rectangle the background changes to a gradient: <Rectangle Height="88" HorizontalAlignment="Left" Margin="54,28,0,0" Name="rectangle2" VerticalAlignment="Top" Width="327" Cursor="Hand"> <Rectangle.Style> <Style TargetType="{x:Type Rectangle}"> <Setter Property="Fill" Value="Transparent" /> <Style.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property=

问题 im stuck on calling stored procedures inside a SELECT CASE on a Trigger, it gaves me the following error: [Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'empata(NEW.eqvis)) WHEN 'loc' THEN pierde(NEW.eqvis) WHEN 'vis' THEN g' at line 16 Here is the code: DELIMITER | CREATE TRIGGER updpartido AFTER UPDATE ON partidos FOR EACH ROW BEGIN SET @vgls = vgoles(NEW.eqvis); SET @lgls = vgoles(NEW.eqloc)

问题 I'm using ListView along with the GridView for displaying the data in tabular format: <ListView> <ListView.View> <GridView> <GridViewColumn Header="Name" Width="120" DisplayMemberBinding="{Binding Name}" /> <GridViewColumn Header="Risk" Width="150" DisplayMemberBinding="{Binding RiskName}" /> </GridView> </ListView.View> I have to change the background color based on the RiskName . For example, if RiskName is "High" then the background would be Red, if RiskName is "Medium" then the background

问题 I want this onEdit script on google Spreadsheet to start with Row 2, which skips my header row, but I cannot get it to work with my existing code? Can someone out there help a noob out? function onEdit(e) { var ss = e.source.getActiveSheet(); var rr = e.source.getActiveRange(); //comment 2 lines below if you want it working on all sheets, not just on 2nd one if(ss.getIndex()!= 1) if(ss.getIndex()!= 2) if(ss.getIndex()!= 3) return; /// var firstRow = rr.getRow(); var lastRow = rr.getLastRow();

问题 Recently I created a new website based on codeigniter 3-php and PHPMyADMIN-mysql and I integate one pagination more than that i did a dynamic search with ajax. My problem is when I have more than 1 million 500 thousand results the query starts to put a lot of time. And for this solution I considered using triggers. So I have a little trouble when I use triggers is when I try to make a dynamic filter, I make an example to better understand,I want to know the number of rows corresponding to a

问题 I am trying to change the mail body depending on the macro which trigger the macro called "SendFromGmail" Sub SendFromGmail() Dim rng1 As Range Dim rng2 As Range Dim rng3 As Range Set NewMail = New CDO.Message Set rng1 = Worksheets("Sheet3").Range("H22") Set rng2 = Worksheets("Sheet4").Range("H14") Set rng3 = Worksheets("Sheet5").Range("H18") 'bla bla bla '... '... If rng1.Value > 0.02 Then HTMLBody = "XYZ is up more than" & RangetoHTML(rng1) ElseIf rng2.Value > 0.02 Then .HTMLBody = "XYZ is

问题 I have following stored procedure DELIMITER // CREATE TRIGGER OrderDetail_AFTER_INSERT AFTER INSERT ON OrderDetail FOR EACH ROW BEGIN UPDATE Order SET total = total + NEW.subtotal WHERE id = NEW.orderid; END; // DELIMITER ; the error I am getting is ERROR 1064 <4200>: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version fir the right syntax to use ner 'Order SET total = total + NEW.subtotal WHERE id = NEW.orderid; END' at line 5 any idea? Please