After Insert Trigger and multiple rows - sql

Question

These are my tables
CREATE TABLE Courses
(
Course_ID INT IDENTITY (100 , 10) NOT NULL ,
CONSTRAINT PK_Courses PRIMARY KEY (Course_ID)
Catalog_Course_ID NVARCHAR(10) NOT NULL,
CONSTRAINT FK_Catalog_Course_ID FOREIGN KEY (Course_Number_ID) REFERENCES Course_Catalog (Course_Number_ID)
Schedule_ID INT NOT NULL ,
CONSTRAINT FK_Schedule_ID FOREIGN KEY (Schedule_ID) REFERENCES Classs_Schedule(Schedule_ID)
S_Date DATE NOT NULL ,
E_Date DATE NOT NULL ,
)
CREATE TABLE Course_Management
(
Number INT IDENTITNY (1,1) PRIMARY KEY '
Course_ID INT NOT NULL ,
CONSTRAINT FK_Course_ID FOREIGN KEY (Course_ID) REFERENCES Courses (Course_ID)
Course_Date_Meeting DATE NOT NULL,
Duration INT NOT NULL ,
)
Now what I want to do is to insert data to Courses table, the Course_Management will hold all the meeting that happened or will happen in the course.
Schedule_ID - which days the course have a meeting and also how many hours will be the meating.
Catalog_Course_ID can find the total hours of the course
So if I insert one course with Course_Number_ID (from catalog course table), Schedule_ID and S.Date (strat date) the trigger will find how many meetings we should do (by finding the course duration and divide it by meeting duration ) after finding the all meetings, E.Date (end date) will be update as the last meeting that inserted.
I wrote this trigger
CREATE TRIGGER CouseMetting
ON [dbo].[Courses] AFTER INSERT
AS
BEGIN
DECLARE #Course_ID INT --Last Course ID insert
SET #Course_ID = (Select ##IDENTITY)
DECLARE #CCID INT -- Course Catlog ID reference to CourseID last insert
SET #CCID = (SELECT [Course_Number_ID]
FROM [dbo].[Courses]
WHERE [Course_ID] = #Course_ID)
DECLARE #NUM INT -- Duration of the course in hours reference Course Catlog ID
SET #NUM = (select [Duration]
from [dbo].[Course_Catalog] where [Number_ID] = #CCID)
DECLARE #MET INT -- Numbers of meeting
DECLARE #DUR INT -- Duration of 1 meeting
DECLARE #DATE DATE -- Start date of the CourseID
SET #DATE = (SELECT [S_Date]
FROM [dbo].[Courses]
WHERE [Course_ID] = #Course_ID)
DECLARE #Holiday varchar (24) -- Holiday in Israel
DECLARE #DAY_NAME NVARCHAR(10) -- English day name
DECLARE #Schedule_ID INT
SET #Schedule_ID = (SELECT [Schedule_ID]
FROM [dbo].[Courses]
WHERE [Course_ID] = #Course_ID)
SET #DUR = (SELECT [Meeting_Dur]
FROM [dbo].[Classs_Schedule] WHERE [Schedule_ID] = #Schedule_ID)
SET #MET = #NUM/#dur
While #MET > 0
Begin
SET #Holiday = (SELECT [HolidayISR] FROM [dbo].[FullDates] WHERE [Date] = #DATE)
IF #Holiday IS NULL
BEGIN
INSERT INTO [dbo].[Course_Management] ([Course_ID] , [Course_Date_Meeting] ,[Duration] )
VALUES (#Course_ID , #DATE , #DUR )
SET #met = #met - 1
END
SET #DAY_NAME = (SELECT [DayName] FROM [dbo].[FullDates] WHERE [Date] = #DATE)
IF #Schedule_ID = 1
BEGIN
IF #DAY_NAME LIKE 'Sunday'
BEGIN
SET #DATE= DATEADD(DD , 2 , #DATE)
END
ELSE SET #DATE= DATEADD(DD , 5 , #DATE)
END
IF #Schedule_ID = 2
BEGIN
IF #DAY_NAME LIKE 'Sunday'
BEGIN
SET #DATE= DATEADD(DD , 3 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 4 , #DATE)
END
IF #Schedule_ID = 3
BEGIN
IF #DAY_NAME LIKE 'Sunday'
BEGIN
SET #DATE= DATEADD(DD , 4 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 3 , #DATE)
END
IF #Schedule_ID = 4
BEGIN
IF #DAY_NAME LIKE 'Sunday'
BEGIN
SET #DATE= DATEADD(DD , 2 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 5 , #DATE)
END
IF #Schedule_ID = 5
BEGIN
IF #DAY_NAME LIKE 'Sunday'
BEGIN
SET #DATE= DATEADD(DD , 3 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 4 , #DATE)
END
IF #Schedule_ID = 6
BEGIN
IF #DAY_NAME LIKE 'Sunday'
BEGIN
SET #DATE= DATEADD(DD , 4 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 3 , #DATE)
END
IF #Schedule_ID = 7
BEGIN
IF #DAY_NAME LIKE 'Monday'
BEGIN
SET #DATE= DATEADD(DD , 2 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 5 , #DATE)
END
IF #Schedule_ID = 8
BEGIN
IF #DAY_NAME LIKE 'Monday'
BEGIN
SET #DATE= DATEADD(DD , 3 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 4 , #DATE)
END
IF #Schedule_ID = 9
BEGIN
IF #DAY_NAME LIKE 'Monday'
BEGIN
SET #DATE= DATEADD(DD , 2 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 5 , #DATE)
END
IF #Schedule_ID = 10
BEGIN
IF #DAY_NAME LIKE 'Monday'
BEGIN
SET #DATE= DATEADD(DD , 3 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 4 , #DATE)
END
IF #Schedule_ID = 11
BEGIN
IF #DAY_NAME LIKE 'Tuesday'
BEGIN
SET #DATE= DATEADD(DD , 2 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 5 , #DATE)
END
IF #Schedule_ID = 12
BEGIN
IF #DAY_NAME LIKE 'Tuesday'
BEGIN
SET #DATE= DATEADD(DD , 2 , #DATE)
END
ELSE SET #DATE = DATEADD(DD , 5 , #DATE)
END
END
UPDATE [dbo].[Courses]
SET [E_Date] = (SELECT TOP 1 [Course_Date_Meeting]
FROM [dbo].[Course_Management]
WHERE Course_ID = #Course_ID
ORDER BY [Course_Date_Meeting] DESC )
END
The Fulldates table is table the hold all the dates and holidays so if the meeting date is some holiday that trigger will now insert it and will continue to the next meeting
Now if I insert one course with Course_Number_ID (from catalog courses table) and a Schedule_ID and S.Date, every thing works fine.
When I try to insert multiple rows for the course table it works but for the Course_Management only the last row that has been inserted.
I got 5K rows table with Course_Number_ID , Schedule_ID , S.Date and I want to insert it.
I also tried to enter row by row with where clause and it's working.
So the only problem it with multiple rows.
Anyone know where is the problem?