update trigger to update records in another table - sql

Question

I have on User_Table
CREATE TABLE [dbo].[User_TB]
(
[User_Id] [varchar](15) NOT NULL,
[User_FullName] [varchar](50) NULL,
[User_Address] [varchar](150) NULL,
[User_Gender] [varchar](10) NULL,
[User_Joindate] [varchar](50) NULL,
[User_Email] [varchar](50) NULL,
[User_Branch] [varchar](50) NULL,
[User_TeamLeader] [varchar](50) NULL,
[User_Department] [varchar](50) NULL,
[User_Position] [varchar](50) NULL,
[TID] [int] NULL
)
Break_Table
CREATE TABLE [dbo].[Break_TB]
(
[Break_Id] [int] IDENTITY(1,1) NOT NULL,
[User_Id] [varchar](15) NOT NULL,
[Date] [date] NULL,
[Break_Time] [int] NULL,
[Status] [varchar](50) NULL,
[Late_time] [int] NULL,
[TL_Id] [varchar](15) NULL,
[start_Time] [time](7) NULL,
[end_Time] [time](7) NULL,
)
Log_Table
CREATE TABLE [dbo].[Log_TB]
(
[User_Id] [varchar](50) NOT NULL,
[First_Login] [time](0) NULL,
[Logout] [time](0) NULL,
[Date] [date] NULL,
[Working_Hrs] [time](0) NULL,
)
Now what am trying to do is that whenever the User_Id from User_Table is Updated , I want trying to update User_Id of Another two tables,
I have written trigger for that
Alter TRIGGER [dbo].[updateUserId] on [dbo].[User_TB]
FOR Update
AS
declare #Branch_Name varchar(50),
#User_Id varchar(15)
select #User_Id = i.User_Id from inserted i;
Update Break_TB set User_Id = #User_Id where User_Id = #User_Id;
Update Log_TB set User_Id = #User_Id where User_Id = #User_Id;
But
It only updates records from Break_TB, It not works for Log_TB
Am not very good at triggers, if am wrong please Help me.

Answer 1

You would need something like this - a set-based solution that takes into account that in an UPDATE statement, you might be updating multiple rows at once, and therefore your trigger also must deal with multiple rows in the Inserted and Deleted tables.
CREATE TRIGGER [dbo].[updateUserId]
ON [dbo].[User_TB]
FOR UPDATE
AS
-- update the "Break" table - find the rows based on the *old* User_Id
-- from the "Deleted" pseudo table, and set it to the *new* User_Id
-- from the "Inserted" pseudo table
SET User_Id = i.User_Id
FROM Inserted i
INNER JOIN Deleted d ON i.TID = d.TID
WHERE
Break_TB.User_Id = d.User_Id
-- update the "Log" table - find the rows based on the *old* User_Id
-- from the "Deleted" pseudo table, and set it to the *new* User_Id
-- from the "Inserted" pseudo table
UPDATE Break_TB
SET User_Id = i.User_Id
FROM Inserted i
INNER JOIN Deleted d ON i.TID = d.TID
WHERE
Break_TB.User_Id = d.User_Id
This code assumes that the TID column in the User_TB table is the primary key which remains the same during updates (so that I can join together the "old" values from the Deleted pseudo table with the "new" values after the update, stored in the Inserted pseudo table)