If the field was essentially changed, then change the value of one of its column - sql

Question

I have the essence of the "Requirements". If the user has changed the field "Description" in this instance, it should automatically change the value of the field "Stability" (dropdownlist). That is, if you had to change the description of the requirements, it becomes unstable. I wrote a trigger
CREATE TRIGGER [ChangeStabilityRequirement]
ON [dbo].[Requirement] AFTER UPDATE
AS
BEGIN
if update([Definition])
begin
update [Requirement] set Stability = 2
where RequirementId in (select RequirementId from inserted)
end
end
But the problem is that the trigger is activated when any change entries in the table. A need to respond only to changes in the column "Definition".
MY TABLE
CREATE TABLE [dbo].[Requirement] (
[RequirementId] INT IDENTITY (1, 1) NOT NULL,
[Rationale] NVARCHAR (MAX) NULL,
[CreatedOn] DATE CONSTRAINT [DF__Requireme__Creat__473C8FC7] DEFAULT (getdate()) NULL,
[CurentVersion] NVARCHAR (MAX) NULL,
[State] INT NOT NULL,
[Priority] INT NOT NULL,
[Type] INT NOT NULL,
[Source_BusinessRuleId] INT NULL,
[Stability] INT NOT NULL,
[UserPart] NVARCHAR (MAX) NULL,
[CreatedBy_UserId] INT NULL,
[Responsible_UserId] INT NULL,
[ImplementationVersion] NVARCHAR (MAX) NULL,
[ResponsibleId] INT DEFAULT ((0)) NULL,
[SourceId] INT DEFAULT ((0)) NULL,
[InterfacePoint_InterfacePointId] INT NULL,
[InterfacePointId] INT DEFAULT ((0)) NULL,
[CreatedById] INT DEFAULT ((0)) NULL,
[Definition] NVARCHAR (MAX) DEFAULT ('') NOT NULL,
CONSTRAINT [PK_dbo.Requirement] PRIMARY KEY CLUSTERED ([RequirementId] ASC),
CONSTRAINT [FK_dbo.Requirement_dbo.User_CreatedById] FOREIGN KEY ([CreatedById]) REFERENCES [dbo].[User] ([UserId]),
CONSTRAINT [FK_dbo.Requirement_dbo.User_ResponsibleId] FOREIGN KEY ([ResponsibleId]) REFERENCES [dbo].[User] ([UserId]),
CONSTRAINT [FK_dbo.Requirement_dbo.BusinessRule_SourceId] FOREIGN KEY ([SourceId]) REFERENCES [dbo].[BusinessRule] ([BusinessRuleId])
);
Update table
Updating occurs in a web application interface
This is query from SQL SERVER Profile
exec [dbo].[Requirement_Update]
#RequirementId=32,
#Definition=N'Реализовать возможность выбора значения "Без пени" в поле "Тип начисления пени". Диалоговое окно АР-12',
#Rationale=N'В соответствии с изменением бизнес-правила',
#CreatedOn='2014-12-18 00:00:00',
#CurentVersion=N'2.1',
#ImplementationVersion=N'2.2',
#State=0,
#Priority=1,
#Stability=1,
#Type=0

Answer 1

Ok, if you need update Requirement only when Definition is updated then change your trigger as:
CREATE TRIGGER [ChangeStabilityRequirement]
ON [dbo].[Requirement] AFTER UPDATE
AS
BEGIN
if update([Definition]) AND NOT update([Rationale]) AND NOT update([CurentVersion])
--AND NOT UPDATE(.....list here all possible columns that may be updated
begin
update [Requirement] set Stability = 2
where RequirementId in (select RequirementId from inserted)
end
end