triggers

问题 If a user changes table HelloWorlds , then I want 'action they did', time they did it, and a copy of the original row insert into HelloWorldsHistory . I would prefer to avoid a separate triggers for insert, update, and delete actions due to the column lengths. I've tried this: create trigger [HelloWorlds_After_IUD] on [HelloWorlds] FOR insert, update, delete as if @@rowcount = 0 return if exists (select 1 from inserted) and not exists (select 1 from deleted) begin insert into

问题 (Note: updated with adopted answer below.) For a PostgreSQL 8.1 (or later) partitioned table, how does one define an UPDATE trigger and procedure to "move" a record from one partition to the other, if the UPDATE implies a change to the constrained field that defines the partition segregation? For example, I've a table records partitioned into active and inactive records like so: create table RECORDS (RECORD varchar(64) not null, ACTIVE boolean default true); create table ACTIVE_RECORDS (

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I'm trying to set up a trigger so that whenever the PL_Witness table is updated, it makes a record of this in the PLAUDWIT table which is an auditing table. However, every single time I try to make this trigger I get bad bind variable, and I am getting this on other audit triggers I am attempting to make too.

问题 while creating trigger in mysql i m getting error 1046. my query is: CREATE TABLE test.Employee( id int, first_name VARCHAR(30), last_name VARCHAR(15), start_date DATE, end_date DATE, city VARCHAR(10), description VARCHAR(15) ); CREATE TABLE test.Employee_log( id int, first_name varchar(50), last_name varchar(50), start_date date, end_date date, city varchar(50), description varchar(50), Lasinserted Time ); when i am executing below lines it is giving error: Error Code : 1064 You have an

问题 I want to use trigger to make foreign key in MySql. I have the following tables: 1) 'content' table: teacher_id varchar(20) sub_id varchar(20) path varchar(100) file_name varchar(100) 2) 'teacher' table: teacher_id varchar(20) teacher_name varchar(45) and I am using the following code for trigger(delimiter //): CREATE TRIGGER fk_content_teacher_temp BEFORE INSERT ON `content` FOR EACH ROW BEGIN DECLARE has_row TINYINT; SET has_row = 0; SELECT 1 INTO has_row FROM `teacher` INNER JOIN `content`

问题 Recently I have been working with a SQL Server database and I was trying to create some triggers for some tables using SQuirreL SQL Client and for some reason I was unable to get rid of the following pesky error message: "Error: 'CREATE TRIGGER' must be the first statement in a query batch. SQLState: S0001 ErrorCode: 111" The query I was attempting to execute was the following (I started out with a really simple trigger to make sure the syntax was correct): CREATE TRIGGER meeting_overlap on

问题 I have two tables 'survey' and 'results' survey table ----------------------------------------------- survey_id | name | p1q1 | p1q2 | p1q5 ----------------------------------------------- 1 | John | 10 | 10 | 5 ----------------------------------------------- 2 | Erick | 12 | 15 | 23 ----------------------------------------------- results table id | Uptake | PY5Q1 | ---------------------------- 1 | AZT | NULL | ---------------------------- 2 | UPDP | NULL | ---------------------------- I'm new

问题 I have tried to perform update on table which was trigger by update on other table and I got error message: The row value(s) updated or deleted either do not make the row unique or they alter multiple rows. For example I have this tables: table_1 =========== int id (primary_key,identity) nchar(10) state_name table_2 =========== int number And after updating table_2 I want to change all values in column 'state_name' to 'false' create trigger tr on table_2 after update as update table_1 set

问题 I'm working with an Oracle database, interacting with it both from Oracle SQL Developer and from R. This database is shared between several people, but because of some company rules we all use the same user to interact with it. In one of our tables we found a strange behaviour, were a line is constantly inserted without any order that we know of. Say, on Table1, sometimes there is a line with value Name = "Test" created >8K times, and we can't figure out why is this happening. What I wanted

问题 Let's say I have two databases 'db1' & 'db2' on different mysql servers 'A' & 'B' respectively. I want to check every 6 hours if there is any update found in 'table1' in 'db2', then the 'table1' in 'db1' will be automatically updated. How can I do that with trigger or a cron job? and when it will be fired? 回答1: You could do with with a cron job, simply could run a php file every minute. this file can check for a new row in a table1 in db2 (saving current count of rows in a text file for