SQLite - 删除id最低的行

Question

如何从具有最低rowid的表中删除行？ 谢谢。

Answer 1

DELETE FROM
  MyTable
WHERE
  Id = (SELECT MIN(Id) FROM MyTable);

Answer 2

在大多数情况下，rowid是一个索引列。如果是这种情况，多更快的解决方案是：

DELETE FROM 
  tablename
WHERE
  rowid= (SELECT rowid FROM tablename order by rowid limit 1)

如果没有索引rowid，那么：

DELETE FROM 
  tablename
WHERE
  rowid= (SELECT MIN(rowid) FROM tablename)

我仍然会测试第一个，因为它通常会更快，即使rowid没有编入索引。

Answer 3

DELETE FROM 
  tablename
WHERE
  rowid= (SELECT MIN(rowid) FROM tablename)