triggers

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . i want to send an email as a user inserts some data into a table. is this possible in sql express? please help with the code. i would use a trigger for insertion on the table. for email what features shall i have on my PC. i have Windows XP. 回答1: As far as I know, SQL Express does

问题 I have a very interesting question. I am trying to generate value for the 'Name' field based on the value of the 'ID' (primary key field). So for example, 'ID' is 142 The 'Name' will be 19142. '19' indicating the current year. For this, I wrote the following trigger (which works fine): CREATE TRIGGER [dbo].[GenerateTheName] ON [dbo].[Table1] AFTER INSERT AS BEGIN UPDATE [dbo].[Table1] SET [Name] = (SELECT FORMAT(GETDATE(),'yy')) + (SELECT CAST(FORMAT([ID],'000','en-US') AS VARCHAR(4)) FROM

问题 Tring to achieve- I am trying to update color_status in tb_sites_3 (3 will be dynamic based on program_id which we will get from tb_tickets) Whenever any insert is made on tb_jobs. ERROR While creating a trigger I am getting the following error ERROR #1054 - Unknown column 'program_id' in 'NEW' tb_tickets tb_jobs tb_sites_3 DELIMITER // CREATE TRIGGER trig_job_color BEFORE INSERT ON `tb_jobs` FOR EACH ROW BEGIN SET NEW.program_id = (Select program_id from tb_tickets where tb_tickets.job_id =

问题 Tring to achieve- I am trying to update color_status in tb_sites_3 (3 will be dynamic based on program_id which we will get from tb_tickets) Whenever any insert is made on tb_jobs. ERROR While creating a trigger I am getting the following error ERROR #1054 - Unknown column 'program_id' in 'NEW' tb_tickets tb_jobs tb_sites_3 DELIMITER // CREATE TRIGGER trig_job_color BEFORE INSERT ON `tb_jobs` FOR EACH ROW BEGIN SET NEW.program_id = (Select program_id from tb_tickets where tb_tickets.job_id =

问题 I have two Oracle schemas A & B. Can I create a trigger in schema A that will listen to Create Tables on Schema B? If yes, which grants do I need to do? 回答1: Yes, you can. The user a needs to have CREATE ANY TRIGGER : As DBA: CREATE USER a IDENTIFIED BY a; GRANT CREATE SESSION, CREATE ANY TRIGGER TO a; CREATE USER b IDENTIFIED BY b; GRANT CREATE SESSION TO b; As a: CREATE OR REPLACE TRIGGER a.create_trigger BEFORE CREATE ON b.SCHEMA BEGIN raise_application_error(num => -20000, msg=> 'create

问题 I have a hierarchical structure stored in a table. Each element has a pointer to its previous, next and a parent create table CATALOGUE ( NAME VARCHAR2(300) not null, NEXT_ID NUMBER(38), PARENT_ID NUMBER(38), PREVIOUS_ID NUMBER(38), XID NUMBER(38) ); I have a java application, which uses O/R mapping to access and modify this table. Sometimes my catalog got corrupted, e.g. they are linked elements which don't have the same parent. I'm wondering if I can ensure data consistency using Oracle

问题 I have an Google form that field crews fill out and submit. The attached javascript emails the contents of the form as emails to everyone in the office. The execution times are super long. One has 19496 reported seconds, when Gsuite should automatically terminate any script at 5 minutes. Some have "Unknown" status in the Google app script execution log and 0 seconds. Is the Gsuite quota being used up? Is there an error in my script? The user running the script trigger also receives a bounce

问题 I am trying to create a trigger in a table called race that enforces a constraint which is "STARTDATE<=MEETING.ENDDATE" in other words startdate from the race table must be less than or equals to to the enddate of the meetings table (THE STARTDATE CANNOT BE RUN AFTER THIS DATE!) I would like the trigger to fire when adding a record to the race table and the startdate entered is wrong (startdate is after the enddate of the meetings table) I have created this so far but I don't know if I'm

问题 I would like to ask a question about triggers. Let's say that I have a table T and I need a trigger before update. However, I have a problem. I need to check a condition using the other rows of T from the trigger. My question is: Which RDBMS's support this? Where can I write triggers which perform selection(s) on the same table where the trigger fires. For instance: CREATE TRIGGER updtrigger BEFORE UPDATE ON Employee -> FOR EACH ROW -> BEGIN -> IF NEW.Salary<=500 THEN -> SET NEW.Salary=10000;

问题 I want to create a Trigger which create a new table Row. I'm completely new in the "Trigger Language" and i need your Help. My Database look like the following. user ---------------------------------------------------- | userid | username | password | full_name | email | ---------------------------------------------------- | 67 | testuser | xxxxxxxx | thefullna | email | ---------------------------------------------------- | 68 | testuse2 | xxxxxxxx | thefulln2 | email | ---------------------