title: SQlite: Column format for unix timestamp; Integer types
body: <p>Original problem:
  What is the right column format for a unix timestamp?</p>
  
  <p>The net is full of confusion: some posts claim SQLite has no unsigned types - either whatsoever, or with exception of the 64bit int type (but there are (counter-)examples that invoke UNSIGNED INTEGER). The data types page mentions it only in a bigint example. It also claims there is a 6-byte integer but doesn't give a name for it. It seems my tries with INTEGER being 4-byte signed signed store unix timestamps as negative numbers. I've heard that some systems return 64-bit timestamps too. OTOH I'm not too fond of wasting 4 bytes to store 1 extra bit (top bit of timestamp), and even if I have to pick a bigger data format, I'd rather go for the 6-byte one. I've even seen a post that claims SQLite unix timestamp is of type REAL...</p>
  
  <p>Complete problem:
  Could someone please clarify that mess?</p>