hashtag_usages

Column Name	Type	Comment	Default	Null	Remark
id	bigint UNSIGNED	Primary Key ID		NO	Auto Increment
usage_type	tinyint UNSIGNED	Type of target		NO
usage_id	bigint UNSIGNED	Key ID		NO
hashtag_id	bigint UNSIGNED	Topic ID		NO	Related field hashtags->id
created_at	timestamp	Create Time	CURRENT_TIMESTAMP	NO
updated_at	timestamp	Update Time		YES
deleted_at	timestamp	Delete Time		YES