google-cloud-spanner

I have a People table (Id, first_name, last_name) , where the primary key is id . I want to be able to look up the first N people in the table ordered by (last_name, first_name, Id) . In some cases, I need to lookup the next N people, and so on. I want to do this efficiently. What is the best way to do this? There are two primary ways: Use LIMIT and OFFSET Use LIMIT and key-of-previous-page The OFFSET strategy lets you read an arbitrary page, but is not efficient since each time the query runs it must read the rows from all previous pages. It is the easiest to implement and can be an

I tried to read the document multiple times but failed to understand it. Can someone explain it in layman's terms? TrueTime is an API available at Google that directly exposes clock uncertainty. Comparing to standard datetime libraries , instead of a particular timestamp, TrueTime's now() function returns an interval of time [earliest, latest]. It also provides two functions: after(t) returns true if t has definitely passed. E.g. t < now().earliest . before(t) returns true if t has definitely not arrived, or t > now().latest . What's impressive, is that the implementation of now() returns