triggers

问题 I'm having problems updating row in a table with value selected from another table in MySQL Trigger. My Trigger looks like this CREATE TRIGGER update_user_last_login AFTER INSERT or UPDATE ON last FOR EACH ROW BEGIN DECLARE _user_id INTEGER; SELECT user_id INTO _user_id FROM user_profile WHERE user_name = NEW.username; UPDATE user set last_login = NEW.seconds WHERE id = _user_id; END I'm getting error message: ERROR 1054 (42S22): Unknown column '_user_id' in 'where clause' Could somebody

问题 I have the following tables: CREATE TABLE QUESTION( id varchar(10) NOT NULL PRIMARY KEY, que_type numeric(1)); CREATE TABLE ESSAY( que_id varchar(10) NOT NULL PRIMARY KEY, ans varchar(2000), FOREIGN KEY (que_id) REFERENCES QUESTION (id)); CREATE TABLE TFFB( que_id varchar(10) NOT NULL PRIMARY KEY, ans varchar(50), FOREIGN KEY (que_id) REFERENCES QUESTION (id)); CREATE TABLE MCQ( que_id varchar(10) NOT NULL PRIMARY KEY, ans varchar(200), FOREIGN KEY (que_id) REFERENCES QUESTION (id)); and try

问题 I want people to jump to the current date row when opening the sheet. However, this should be the case for everyone viewing the sheet and irrespective of their edit-rights. For example, I want that people edit the current date row in the sheet every day over the link. In this case, onOpen() does not work. Is there any alternative or modification to the function? I am informed about onOpen trigger, however, this would not work if somebody is editing the sheet only over the link with edit

问题 I would like a nice little orange border around my Textbox whilst the user is typing in it (Has Focus). I defined styles for the tiggers I think I need, but there is a strange behavior. When the cursor is in the TextBox and the WPF app has focus, it has a blue border. But while the cursor is focused and I click outside of the app (like in visual studio) it becomes orange. I've tried overriding many triggers but to no avail. This is what happens when I focus on the textbox but am focused on

问题 Working in a VR unity project, trying to do some C# scripting. My character model has two feet that are controlled in VR using trackers. I need a way to find out when both feet are colliding with cubes. cube A for left foot and cube B for the right foot at the same time. So that I can spawn another object when the condition is met. What would be the way of doing it? What object should have the script? Right now, the cubes have a OnTriggerStay function that checks for collision with feet and

问题 I'm trying to implement a Cassandra trigger such that when there is an update or a delete on keyspace1.tableA, the trigger will add a row to keyspace1.tableB. The names of the columns in tableB are completely different than the columns in tableA. I'm working with Cassandra 2.1, no option to move to a more recent version. Looking at the InvertedIndex trigger example at https://github.com/apache/cassandra/blob/cassandra-2.1/examples/triggers/src/org/apache/cassandra/triggers/InvertedIndex.java

问题 Is there any way to automatically create a trigger on creation of new table in MySQL? 回答1: As I've pointed out in your other question, I think a process and security review is in order here. It's an audited database, so nobody ( especially third-party service providers) should be creating tables in your database without your knowledge . The issue you've got is, as well as the new table being created, you will also need to have another table created to store the audited/changed records, which

问题 I am looking for a way for a trigger to insert into a second table only where the value in table 1 changes. It is essentially an audit tool to trap any changes made. The field in table 1 is price and we want to write additional fields. This is what I have so far. CREATE TRIGGER zmerps_Item_costprice__update_history_tr ON [ITEM] FOR UPDATE AS insert into zmerps_Item_costprice_history select NEWID(), -- unique id GETDATE(), -- CURRENT_date 'PRICE_CHANGE', -- reason code a.ima_itemid, -- item id

问题 I have an UPDATE trigger that produces INSERTED and DELETED table like this: INSERTED Id Name Surname 1 Stack Overflow 2 Luigi Saggese DELETED Id Name Surname 1 Stacks Overflow 2 Luigi Sag I want to capture this update to a log table. My Log table (that is global for all tables) is like this (then I must process my INSERTED and DELETED table): Id_Table Table_Key_Value Id_Value Old_Value New_Value 12345 1 4556645 Stack Stacks 12345 1 544589 Overflow Overflows 12345 2 544589 Saggese Sag Id

问题 I have a ComboBox, and i want to change its look when the ItemsSource property is null. When it is in that state, i want to show a TextPanel with the text "Retrieving data" in it, and give it a look kind of similar to the watermarked textbox. I figure to do this i need a ControlTemplate, and a trigger. I have the ControlTemplate here: <ControlTemplate x:Key="LoadingComboTemplate" TargetType="{x:Type ComboBox}"> <Grid> <TextBlock x:Name="textBlock" Opacity="0.345" Text="Retrieving data..."