Say there are two relations r and s such that the foreign key B of r references the primary key A 开发者_运维百科of s.How can the trigger mechanism be used to implement the on delete cascade option, w
I\'ve never used triggers before, but this seems like a solid use case. I\'d like to know if triggers are what I should be using, and if so, I could use a little hand-holding on how to go 开发者_开发技
I have a WPF application that has a light and a switch. When I press the switch the switch and light should change to its \"ON\" image and when I press again they should change to their \"OFF\" images
I can\'t figure out why this trigger creation syntax fails: CREATE TRIGGER mytrigger BEFORE UPDATE ON mytable
NameDeptID MARKXYZ25 DENIMABC35 SOLODEF45 The above is my table.Here when the update is done, a trigger will be executed to get the old values and store that in a existing log table with the updated
I have a table called Events that I want to insert information to. Here is the Event table schema: create table Evento
I need to create an audit log like feature where most of one table\'s fields are copied to another when they are modified.Normally, I would create 开发者_StackOverflowa SQL trigger to do this.
I\'m trying to execute the following trigger: create trigger t23 on studies after insert, update, delete
If I run an insert query, but I have a trigger on a table to increment another value bas开发者_高级运维ed upon the trigger, but there\'s something wrong with the trigger, will it still execute my quer
create tablestudent (spnrVARCHAR(5)PRIMARY KEY, s开发者_运维技巧nameVARCHAR(10), saddressVARCHAR(10),
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