Question

我正在开发Android应用程序我想从sq-lite数据库表中删除最后两行。如果有人知道那么请帮助。

我实现了一个只删除最后一行的查询

PageView

Answer 1

您可以使用此查询

"DELETE FROM my_chat WHERE project_id ='" + project_id + "' AND id in (select id from my_chat order by id desc limit 2)"

Answer 2

您可以使用

toolbar.setNavigationOnClickListener(new Button.OnClickListener() {
        @Override
        public void onClick(View v) {
            main = new Intent(SettingActivity.this, MainActivity.class);
            main.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
            finish();

            InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
            inputMethodManager.hideSoftInputFromWindow(v.getWindowToken(), 0);

            startActivity(main);
            overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
        }
    });

参考：How to delete last 10 records in sqlite

Answer 3

DELETE FROM my_chat WHERE  project_id ='" + project_id + "' AND id IN (
     SELECT id
     FROM my_chat
     ORDER BY id DESC
     LIMIT 0, 2
)

我的代码不会删除Android中sqlite数据库表的最后2行

3 个答案: