SQLite生成Guid(uuid)
SELECT lower( hex(randomblob(4)) || '-' || hex(randomblob(2)) || '-' || '4' || substr(hex( randomblob(2)), 2) || '-' || substr('AB89', 1 + (abs(random()) % 4) , 1) || substr(hex(randomblob(2)), 2) || '-' || hex(randomblob(6)) ) GUID