Question

I want to do all these update in one statement.

update table set ts=ts_1 where id=1
update table set ts=ts_2 where id=2
...
update table set ts=ts_n where id=n

Is it?

Answer 1

Yes you can but that would require a table (if only virtual/temporary), where you’s store the id + ts value pairs, and then run an UPDATE with the FROM syntax.
Assuming tmpList is a table with an id and a ts_value column, filled with the pairs of id value, ts value you wish to apply.

UPDATE table, tmpList
  SET table.ts = tmpList.ts_value
WHERE table.id = tmpList.id
  -- AND table.id IN (1, 2, 3, .. n)  
  -- above "AND" is only needed if  somehow you wish to limit it, i.e 
  -- if tmpTbl has more idsthan you wish to update

A possibly table-less (but similar) approach would involve a CASE statement, as in:

UPDATE table
  SET ts = CASE id
      WHEN 1 THEN 'ts_1'
      WHEN 2 THEN 'ts_2'
      -- ..
      WHEN n THEN 'ts_n'
  END
  WHERE id in (1, 2, ... n)  -- here this is necessary I believe