car_types

Description

car types (e.g. Series 0 with 16 car length)

Table Definition

```sql CREATE TABLE `car_types` ( `id` bigint unsigned NOT NULL AUTO_INCREMENT COMMENT 'counter to identify each record', `train_line_id` bigint unsigned NOT NULL COMMENT 'line id that has this car type', `car_type_name` varchar(64) NOT NULL COMMENT 'car type name', `car_length` int NOT NULL COMMENT 'car length', PRIMARY KEY (`id`), UNIQUE KEY `train_line_id` (`train_line_id`,`car_type_name`), CONSTRAINT `car_types_ibfk_1` FOREIGN KEY (`train_line_id`) REFERENCES `train_lines` (`id`) ON DELETE CASCADE ) ENGINE=InnoDB AUTO_INCREMENT=[Redacted by tbls] DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='car types (e.g. Series 0 with 16 car length)' ```

Columns

#	Name	Type	Default	Nullable	Extra Definition	Children	Parents	Comment
1	id	bigint unsigned		false	auto_increment	a_works		counter to identify each record
2	train_line_id	bigint unsigned		false			train_lines	line id that has this car type
3	car_type_name	varchar(64)		false				car type name
4	car_length	int		false				car length

Constraints

#	Name	Type	Definition
1	car_types_ibfk_1	FOREIGN KEY	FOREIGN KEY (train_line_id) REFERENCES train_lines (id)
2	PRIMARY	PRIMARY KEY	PRIMARY KEY (id)
3	train_line_id	UNIQUE	UNIQUE KEY train_line_id (train_line_id, car_type_name)

Indexes

#	Name	Definition
1	PRIMARY	PRIMARY KEY (id) USING BTREE
2	train_line_id	UNIQUE KEY train_line_id (train_line_id, car_type_name) USING BTREE

Relations

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Generated by tbls