diff --git a/ag_beispieldaten_mr_c.sql b/ag_beispieldaten_mr_c.sql
new file mode 100644
index 0000000..d22d1fc
--- /dev/null
+++ b/ag_beispieldaten_mr_c.sql
@@ -0,0 +1,256 @@
+
+INSERT INTO lehrkraft (Kuerzel, Name, Vorname) VALUES
+('CAKM','Cakmaz','Ferit'),
+('HARJ','Harjes','Olaf'),
+('STRI','Stricker','Ines'),
+('BRUE','Brückler','Thomas'),
+('MNDT','Mundt','Meline'),
+('WEIS','Weis','Torsten'),
+('GOEL','Göldner','Marcus'),
+('LANG','Lange','Judith'),
+('POEP','Poeplau','Nicola'),
+('GROE','Grön','Judith'),
+('MEYR','Meyer','Merlin'),
+('SHUT','Schuh','Teresa'),
+('SCHA','Schäfer','Alexander'),
+('DENZ','Denz','Steffi'),
+('GOTT','Ilka','Goltsche');
+
+INSERT INTO ag (AGName, AnzahlSus, Raum, Tag, Stunden, Kuerzel) VALUES
+('Robotik-AG', 15, '111', 'Montag', 2, 'CAKM'),
+('Fair Trade-AG', 12, 'E15', 'Dienstag', 2, 'SHUT'),
+('Goetheater-AG', 14, 'Bühne', 'Mittwoch', 3, 'WEIS'),
+('Vogel-AG', 10, 'BioTop', 'Donnerstag', 2, 'POEP'),
+('Sanitäter-AG', 16, 'E3', 'Freitag', 3, 'GROE'),
+('Basketball-AG', 20, 'THG2', 'Montag', 2, 'STRI'),
+('Umwelt-AG', 18, 'K3', 'Dienstag', 2, 'LANG'),
+('Tanz-AG', 22, 'THG1', 'Mittwoch', 3, 'MNDT'),
+('Fußball-AG', 25, 'THG1', 'Donnerstag', 2, 'GOEL'),
+('Technik-AG', 17, '101', 'Freitag', 3, 'SCHA'),
+('Video-AG', 13, '111', 'Montag', 2, 'BRUE'),
+('Mint-Garage', 19, 'Lab1', 'Dienstag', 3, 'HARJ'),
+('Mathe-AG', 21, 'R104', 'Mittwoch', 2, 'MEYR'),
+('Goethe-Band', 11, 'Musik', 'Donnerstag', 3, 'DENZ'),
+('Garten-AG', 9, 'K3', 'Freitag', 2, 'GOTT');
+
+INSERT INTO schueler (SNr, Name, Vorname, Klasse) VALUES
+(1, 'Chen', 'Kim', '6B'),
+(2, 'Meyer', 'Sofia', '7A'),
+(3, 'Khan', 'Arjun', '8B'),
+(4, 'Müller', 'Mila', '9A'),
+(5, 'Ivanova', 'Noah', '5B'),
+(6, 'Tachid', 'Fatima', '6A'),
+(7, 'Ali', 'Polat', '7B'),
+(8, 'Schneider', 'Leila', '8A'),
+(9, 'Nakamura', 'Mateo', '9B'),
+(10, 'Hernandez', 'Zara', '5A'),
+(11, 'Kim', 'Hugo', '6B'),
+(12, 'Meyer', 'Yara', '7A'),
+(13, 'Müller', 'Emir', '8B'),
+(14, 'Abdi', 'Nina', '9A'),
+(15, 'Rahman', 'Omar', '5B'),
+(16, 'Costa', 'Ivy', '6A'),
+(17, 'Bakker', 'Ravi', '7B'),
+(18, 'Dubois', 'Maya', '8A'),
+(19, 'Smith', 'Tariq', '9B'),
+(20, 'Schäfer', 'Amina', '5A'),
+(21, 'Chen', 'Luca', '6B'),
+(22, 'Singh', 'Sofia', '7A'),
+(23, 'Khan', 'Arjin', '8B'),
+(24, 'Silva', 'Mila', '9A'),
+(25, 'Meyer', 'Noah', '5B'),
+(26, 'Yamamoto', 'Folir', '6A'),
+(27, 'Ali', 'Kenji', '7B'),
+(28, 'Garcia', 'Lia', '8A'),
+(29, 'Nakamura', 'Mateo', '9B'),
+(30, 'Hernandez', 'Zara', '5A'),
+(31, 'Kim', 'Hugo', '6B'),
+(32, 'Meyer', 'Yara', '7A'),
+(33, 'Novak', 'Emir', '8B'),
+(34, 'Abdi', 'Nina', '9A'),
+(35, 'Rahman', 'Omar', '5B'),
+(36, 'Costa', 'Ivy', '6A'),
+(37, 'Schäfer', 'Ravi', '7B'),
+(38, 'Krauss', 'Lina', '8A'),
+(39, 'Smith', 'Tariq', '9B'),
+(40, 'Okoye', 'Alina', '5A'),
+(41, 'Chen', 'Luca', '6B'),
+(42, 'Schäfer', 'Sofia', '7A'),
+(43, 'Khan', 'Arjun', '8B'),
+(44, 'Silva', 'Mila', '9A'),
+(45, 'Ivanov', 'Noah', '5B'),
+(46, 'Schäfer', 'Fatima', '6A'),
+(47, 'Schmitt', 'Kenji', '7B'),
+(48, 'Garcia', 'Maria', '8A'),
+(49, 'Nakamura', 'Mateo', '9B'),
+(50, 'Hernandez', 'Lucas', '5A'),
+(51, 'Meyer', 'Hugo', '6B'),
+(52, 'Schild', 'Yara', '7A'),
+(53, 'Novak', 'Emir', '8B'),
+(54, 'Abdi', 'Nina', '9A'),
+(55, 'Rahman', 'Omar', '5B'),
+(56, 'Costa', 'Ivy', '6A'),
+(57, 'Bakker', 'Ravi', '7B'),
+(58, 'Dubois', 'Lina', '8A'),
+(59, 'Braun', 'Tariq', '9B'),
+(60, 'Okoye', 'Amina', '5A'),
+(61, 'Chen', 'Luca', '6B'),
+(62, 'Müller', 'Sofia', '7A'),
+(63, 'Khan', 'Arjun', '8B'),
+(64, 'Silva', 'Mila', '9A'),
+(65, 'Ivanova', 'Noah', '5B'),
+(66, 'Götz', 'Fatima', '6A'),
+(67, 'Ali', 'Murat', '7B'),
+(68, 'Gopez', 'Leila', '8A'),
+(69, 'Nakamura', 'Mateo', '9B'),
+(70, 'Hernandez', 'Zara', '5A'),
+(71, 'Kim', 'Hugo', '6B'),
+(72, 'Popescu', 'Yara', '7A'),
+(73, 'Kara', 'Emir', '8B'),
+(74, 'Abdi', 'Nina', '9A'),
+(75, 'Rahman', 'Omar', '5B'),
+(76, 'Costa', 'Ivy', '6A'),
+(77, 'Becker', 'Ravi', '7B'),
+(78, 'Hoppe', 'Lina', '8A'),
+(79, 'Smith', 'Tariq', '9B'),
+(80, 'Okoye', 'Amina', '5A'),
+(81, 'Chen', 'Luca', '6B'),
+(82, 'Singh', 'Sofia', '7A'),
+(83, 'Khan', 'Arjun', '8B'),
+(84, 'Silva', 'Mila', '9A'),
+(85, 'Ivanova', 'Noah', '5B'),
+(86, 'Yamamoto', 'Fatima', '6A'),
+(87, 'Ali', 'Kenji', '7B'),
+(88, 'Garcia', 'Leila', '8A'),
+(89, 'Nakamura', 'Mateo', '9B'),
+(90, 'Hernandez', 'Zara', '5A'),
+(91, 'Kim', 'Hugo', '6B'),
+(92, 'Popescu', 'Yara', '7A'),
+(93, 'Novak', 'Emir', '8B'),
+(94, 'Sahin', 'Nina', '9A'),
+(95, 'Rahman', 'Omar', '5B'),
+(96, 'Stützer', 'Ivy', '6A'),
+(97, 'Maier', 'Ravi', '7B'),
+(98, 'Schumacher', 'Lina', '8A'),
+(99, 'Smith', 'Tariq', '9B'),
+(100, 'Zimmermann', 'Amina', '5A');
+
+INSERT INTO veranstaltung (VerNr, Bezeichnung, Start, Ende, Dauer, AGName) VALUES
+(1, 'Roboter Kampf', '2026-11-12', '2026-11-13', 180, 'Robotik-AG'),
+(2, 'Voice of Goethe', '2026-04-03', '2026-04-03', 120, 'Fair Trade-AG'),
+(3, 'Dancing Time', '2026-06-04', '2026-06-04', 120, 'Goetheater-AG'),
+(4, 'Erste Hilfe Kurs', '2026-05-05', '2026-05-07', 120, 'Vogel-AG'),
+(5, 'Fußballturnier', '2026-06-11', '2026-06-11', 120, 'Sanitäter-AG'),
+(6, 'Basketballturnier', '2026-09-07', '2026-09-07', 180, 'Basketball-AG'),
+(7, 'Nachhaltigkeitsmesse 7', '2026-06-20', '2026-06-20', 120, 'Umwelt-AG'),
+(8, 'Theateraufführung', '2026-05-19', '2026-05-19', 60, 'Tanz-AG'),
+(9, 'Fußballturnier', '2026-06-10', '2026-06-14', 240, 'Fußball-AG'),
+(10, 'Coding Night', '2026-06-11', '2026-06-11', 90, 'Technik-AG'),
+(11, 'Filmabend', '2026-06-12', '2026-06-12', 60, 'Video-AG'),
+(12, 'Technik Expo', '2026-02-13', '2026-02-13', 120, 'Mint-Garage'),
+(13, 'Mathe Wettbewerb', '2026-11-14', '2026-11-14', 90, 'Mathe-AG'),
+(14, 'Band Konzert', '2026-10-25', '2026-06-26', 240, 'Goethe-Band'),
+(15, 'Gartenfest', '2026-06-16', '2026-06-16', 120, 'Garten-AG'),
+(16, 'Vogelbeobachtung', '2026-04-10', '2026-04-10', 45, 'Vogel-AG');
+
+INSERT INTO besucht (AGName, SNr) VALUES
+('Robotik-AG', 1),
+('Fair Trade-AG', 2),
+('Goetheater-AG', 3),
+('Vogel-AG', 4),
+('Sanitäter-AG', 5),
+('Basketball-AG', 6),
+('Umwelt-AG', 7),
+('Tanz-AG', 8),
+('Fußball-AG', 9),
+('Technik-AG', 10),
+('Video-AG', 11),
+('Mint-Garage', 12),
+('Mathe-AG', 13),
+('Goethe-Band', 14),
+('Garten-AG', 15),
+('Robotik-AG', 16),
+('Fair Trade-AG', 17),
+('Goetheater-AG', 18),
+('Vogel-AG', 19),
+('Sanitäter-AG', 20),
+('Basketball-AG', 21),
+('Umwelt-AG', 22),
+('Tanz-AG', 23),
+('Fußball-AG', 24),
+('Technik-AG', 25),
+('Video-AG', 26),
+('Mint-Garage', 27),
+('Mathe-AG', 28),
+('Goethe-Band', 29),
+('Garten-AG', 30),
+('Robotik-AG', 31),
+('Fair Trade-AG', 32),
+('Goetheater-AG', 33),
+('Vogel-AG', 34),
+('Sanitäter-AG', 35),
+('Basketball-AG', 36),
+('Umwelt-AG', 37),
+('Tanz-AG', 38),
+('Fußball-AG', 39),
+('Technik-AG', 40),
+('Video-AG', 41),
+('Mint-Garage', 42),
+('Mathe-AG', 43),
+('Goethe-Band', 44),
+('Garten-AG', 45),
+('Robotik-AG', 46),
+('Fair Trade-AG', 47),
+('Goetheater-AG', 48),
+('Vogel-AG', 49),
+('Sanitäter-AG', 50),
+('Basketball-AG', 51),
+('Umwelt-AG', 52),
+('Tanz-AG', 53),
+('Fußball-AG', 54),
+('Technik-AG', 55),
+('Video-AG', 56),
+('Mint-Garage', 57),
+('Mathe-AG', 58),
+('Goethe-Band', 59),
+('Garten-AG', 60),
+('Robotik-AG', 61),
+('Fair Trade-AG', 62),
+('Goetheater-AG', 63),
+('Vogel-AG', 64),
+('Sanitäter-AG', 65),
+('Basketball-AG', 66),
+('Umwelt-AG', 67),
+('Tanz-AG', 68),
+('Fußball-AG', 69),
+('Technik-AG', 70),
+('Video-AG', 71),
+('Mint-Garage', 72),
+('Mathe-AG', 73),
+('Goethe-Band', 74),
+('Garten-AG', 75),
+('Robotik-AG', 76),
+('Fair Trade-AG', 77),
+('Goetheater-AG', 78),
+('Vogel-AG', 79),
+('Sanitäter-AG', 80),
+('Basketball-AG', 81),
+('Umwelt-AG', 82),
+('Tanz-AG', 83),
+('Fußball-AG', 84),
+('Technik-AG', 85),
+('Video-AG', 86),
+('Mint-Garage', 87),
+('Mathe-AG', 88),
+('Goethe-Band', 89),
+('Garten-AG', 90),
+('Robotik-AG', 91),
+('Fair Trade-AG', 92),
+('Goetheater-AG', 93),
+('Vogel-AG', 94),
+('Sanitäter-AG', 95),
+('Basketball-AG', 96),
+('Umwelt-AG', 97),
+('Tanz-AG', 98),
+('Fußball-AG', 99),
+('Technik-AG', 100);
diff --git a/ag_create_15_4_26.sql b/ag_create_15_4_26.sql
index ed55e18..fc46478 100644
--- a/ag_create_15_4_26.sql
+++ b/ag_create_15_4_26.sql
@@ -2,39 +2,40 @@ CREATE DATABASE AG;
 USE AG;
 
 CREATE TABLE schueler (
-    SNR int PRIMARY KEY,
+    SNr int PRIMARY KEY,
     Name varchar(255),
     Vorname varchar(255),
-    Klasse int
+    Klasse varchar(4)
 );
 
 CREATE TABLE lehrkraft (
-    Kuerzel varchar(3) PRIMARY KEY,
+    Kuerzel varchar(4) PRIMARY KEY,
     Name varchar(255),
     Vorname varchar(255)
 );
 
 CREATE TABLE ag (
     AGName varchar(255) PRIMARY KEY,
-    Raum varchar(255),
-    Tag date,
-    Stunden time,
     AnzahlSus int,
-    Kuerzel varchar(3)
+    Raum varchar(255),
+    Tag varchar(255),
+    Stunden time,
+    Kuerzel varchar(4),
+    FOREIGN KEY (Kuerzel) REFERENCES lehrkraft(Kuerzel)
 );
 
 CREATE TABLE veranstaltung (
     verNr int PRIMARY KEY,
-    Dauer time,
-    Ende date,
-    Start date,
     Bezeichnung varchar(255),
+    Start date,
+    Ende date,
+    Dauer int,
     AGName varchar(255)
 );
 
 CREATE TABLE besucht (
     AGName varchar(255),
-    SNR int,
+    SNr int,
     PRIMARY KEY (AGName, SNR),
     FOREIGN KEY (AGName) REFERENCES ag(AGName),
     FOREIGN KEY (SNR) REFERENCES schueler(SNR)