triggers

问题 I am working with a WPF client application that uses a list box to display an itinerary. my task is to implement a drag and drop functionality to reorder the list items in the work list, thereby reordering the itinerary. Each of the items in the work list has its own view and viewmodel, and the orange arrow(starts a permit inspection), the red permit number(brings up more info on the permit) and the check box(selects the item in order to upload the inspection, or save changes. also triggers

问题 I'm having problems with creating this trigger in PostgreSQL 8.4. CREATE OR REPLACE FUNCTION tbi_Usuarios() RETURNS TRIGGER AS $tbi_Usuarios$ BEGIN IF trim(both ' ' from NEW.Nombre_usuario) = '' OR NEW.Nombre_usuario IS NULL THEN RAISE EXCEPTION 'Debes ingresar un nombre de usuario.'; END IF; IF NEW.Password = '' OR NEW.Password IS NULL THEN RAISE EXCEPTION 'Debes ingresar una contraseña correctamente'; ELSE NEW.Password := md5(NEW.Password); END IF; IF Fecha_registro IS NULL THEN NEW.Fecha

问题 I am looking back at Oracle (11g) development after few years for my team project and need help. We are trying to implement a POC where any add/drop column will drop and recreate a corrosponding view. View refers to a Mapping table for producing its alias names and selection of columns. My solutions : --1. DDL Trigger that scans for Add Column, Drop Column -> Identifies Column Names -> Updates Field_Map table -> Drops View -> Creates View with Field_Map table alias names Challenge: Received

问题 I wrote a trigger that runs before a row is deleted that updates a table summarizing the data from this table. The trigger works well when I delete a single row at a time. However, if I were to delete multiple rows at once with a statement like DELETE FROM myTable WHERE id BETWEEN 1 and 100; Will the trigger completely run on the first row before the next row is deleted or will the triggers run all at the same time? 回答1: The trigger will completely run for every single row, see Trigger FAQ A

问题 I have using mysql 5.1 with cpanel /whm centOS. I had to use trigger for one of my website. so i installed trigger as root so that when something gets inserted on one table there some more rows gets inserted in other table Everything was working fine, but i have seen that there is no trigger in my dtabase. How does that be deleted from DB. I am bit worried because currently site is not live , but it can cause problem if this happens in live site. Does any mysql updation cause the trigger to

问题 Supposed I have a MongoDB, and I am storing data in it. Is there any possibility to get triggered by MongoDB when data is inserted, updated or deleted? I know that there are tailable cursors, but they only work with capped collections. Anything else? Basically, is there some kind of "event" in the JavaScript API I could listen to? 回答1: MongoDB does not have a concept of "triggers" and instead defers to you to work your own API to handle the tasks you typically associate with SQL Database

问题 Any one help me to create a trigger for auto increment fld_id and Unix datetime. My table field is fld_id(int),fld_date(number),fld_value(varchar2). My insert query is insert into table (fld_value)values('xxx'); insert into table (fld_value)values('yyy'); I need the table record like this fld_id fld_date fld_value 1 1354357476 xxx 2 1354357478 yyy Please help me to create this.I can't able to do this.. 回答1: If you want fld_id to be a sequential value, you'll need to create a sequence and a

问题 Please I did this trigger to update table rating after each insert when 2 columns (id_prof,id_etud) inserted are already in the table but it gives mi this error > #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 6 The trigger : CREATE TRIGGER Before_Insert_Rate BEFORE INSERT ON rating FOR EACH ROW BEGIN IF (EXISTS(SELECT * FROM rating WHERE id_prof=NEW.id_prof and id_etud = NEW.id_etud))

问题 So that when you insert 'abc',it'll be converted to 'ABC' automatically. I'm using MySQL,is it possible? 回答1: You could write an INSERT trigger that does this for you. Something like: CREATE TRIGGER Capitalize BEFORE INSERT ON MyTable SET NEW.MyColumn = UPPER(NEW.MyColumn) 回答2: What about using Upper function while executing query ? lets say You are using a SP to insert the values ... cast the value to upper case using UPPER function and then insert ? 回答3: this really should be done before it

问题 I'm creating a trigger to initialize the value plazas_disponibles on table VUELO with the value capacidad on table MODELO. Like this: create or replace TRIGGER inicializar_plazas_disponibles BEFORE INSERT OR UPDATE ON VUELO BEGIN SET VUELO (plazas_disponibles) = MODELO (capacidad); END inicializar_plazas_disponibles; And I'm getting the following errors: Error(2,10): PL/SQL: SQL Statement ignored Error(2,14): PL/SQL: ORA-00922: missing or invalid option Error(2,23): PL/SQL: ORA-00971: missing