add solutions for the trigger excercise

db/4_sem/BuchAutoren/BuchAutoren/BuchAutoren.ssmssqlproj

@@ -37,6 +37,12 @@
           <AssociatedConnUserName />
           <FullPath>insert_data.sql</FullPath>
         </FileNode>
+        <FileNode Name="triggger_solutions.sql">
+          <AssociatedConnectionMoniker>8c91a03d-f9b4-46c0-a305-b5dcc79ff907:(local)\SQLEXPRESS:True</AssociatedConnectionMoniker>
+          <AssociatedConnSrvName>(local)\SQLEXPRESS</AssociatedConnSrvName>
+          <AssociatedConnUserName />
+          <FullPath>triggger_solutions.sql</FullPath>
+        </FileNode>
       </Items>
     </LogicalFolder>
     <LogicalFolder Name="Miscellaneous" Type="3" Sorted="true">

db/4_sem/BuchAutoren/BuchAutoren/insert_data.sql

@@ -1,4 +1,5 @@
 -- Daten einfügen
+use BuchAutorDB;
 INSERT INTO buch.tblBuch
     VALUES ('3-89842-141-1', 'SELECT * FROM SQL Server 2000', 49.90);
 INSERT INTO buch.tblBuch (ISBN, Titel)

db/4_sem/BuchAutoren/BuchAutoren/triggger_solutions.sql

@@ -0,0 +1,60 @@
+-- ================================================
+-- Template generated from Template Explorer using:
+-- Create Trigger (New Menu).SQL
+--
+-- Use the Specify Values for Template Parameters
+-- command (Ctrl-Shift-M) to fill in the parameter
+-- values below.
+--
+-- See additional Create Trigger templates for more
+-- examples of different Trigger statements.
+--
+-- This block of comments will not be included in
+-- the definition of the function.
+-- ================================================
+SET ANSI_NULLS ON
+GO
+SET QUOTED_IDENTIFIER ON
+GO
+-- =============================================
+-- Author:		Zweili Andreas
+-- Create date: 2017-11-24
+-- Description:
+-- =============================================
+ALTER TRIGGER buch.trigAutorBuch_Insert_Update
+   ON  buch.tblAutorBuch
+   AFTER INSERT, UPDATE
+AS
+BEGIN
+	-- SET NOCOUNT ON added to prevent extra result sets from
+	-- interfering with SELECT statements.
+	SET NOCOUNT ON;
+
+    -- Insert statements for trigger here
+
+    declare @ID int;
+    declare @ISBN char(13);
+    declare @anteil decimal(5,2);
+    declare @anteil_summe decimal(5,2);
+
+    select @ID = ID, @ISBN = ISBN from inserted;
+
+    select @anteil_summe = sum(Anteil) from tblAutorBuch
+        where tblAutorBuch.ISBN = @ISBN;
+
+    if @anteil_summe > 100.00 delete from tblAutorBuch
+        where tblAutorBuch.ID = @ID;
+        print 'Summe ist zu hoch'
+END
+GO
+
+-- Trigger Test
+use BuchAutorDB;
+insert into buch.tblAutor (Nachname, Vorname)
+    values ('Muster', 'Max');
+
+insert into buch.tblAutorBuch (ID, ISBN, Anteil)
+    values (1, '3-89842-129-5', 90.00);
+
+insert into buch.tblAutorBuch (ID, ISBN, Anteil)
+    values (2, '3-89842-129-5', 15.00);