Basic implementation event signup

lib/database/kompass_veranstaltungen_gruppen.sql

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+SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
+START TRANSACTION;
+
+CREATE TABLE `%tablename%` (
+                               `id` int NOT NULL AUTO_INCREMENT,
+                               `eventId` int NOT NULL,
+                               `group_name` varchar(1024) NOT NULL,
+                               `max_participants` int NOT NULL,
+                               `amount_reduced` decimal(8,2) DEFAULT NULL,
+                               `amount_default` decimal(8,2) DEFAULT NULL,
+                               `amount_social` decimal(8,2) DEFAULT NULL,
+                               PRIMARY KEY  (id)
+
+) %charset%;
+
+
+ALTER TABLE `%tablename%`
+    ADD PRIMARY KEY (`id`),
+    ADD KEY `event_group` (`eventId`);
+
+
+ALTER TABLE `%tablename%`
+    MODIFY `id` int NOT NULL AUTO_INCREMENT;
+
+ALTER TABLE `%tablename%`
+    ADD CONSTRAINT `event_group` FOREIGN KEY (`eventId`) REFERENCES `%prefix%kompass_veranstaltungen_index` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT;
+
+COMMIT;