-- pageHeader:
select total, etched_at from pages where page_num = ? and count = ?;

-- pageItems:
select items.json
from page_members
join items on items.item_id = page_members.item_id
where page_members.page_num = ?
order by page_members.pos;

-- knownTotal:
select total from pages where total > 0 order by etched_at desc limit 1;

-- deepestPageSince:
select max(page_members.page_num) as last
from page_members
join items on items.item_id = page_members.item_id
where cast(items.updated as integer) >= ?;

-- pagesThrough:
select count(*) as n from pages where page_num <= ?;

-- itemsByUpdated:
select json from items
where cast(updated as integer) >= ? and cast(updated as integer) < ?
order by cast(updated as integer) desc, item_id;

-- itemsByCreated:
select json from items
where cast(json_extract(json, '$.created_at') as integer) >= ?
	and cast(json_extract(json, '$.created_at') as integer) < ?
order by cast(json_extract(json, '$.created_at') as integer) desc, item_id;