如何通过查询语句从SQLite android中的表中删除一行？

Question

我的代码没有在按钮点击时执行删除操作。

Button delete_user= (Button) findViewById(R.id.delete_user);

    delete_user.setOnClickListener(new View.OnClickListener() {
        @Override

        public void onClick(View view) {


            SignIn_Signup.sqLiteDatabase.execSQL("DELETE FROM mytable WHERE name='name.getText()';");

        }
    });

Answer 1

更正语法：

SignIn_Signup.sqLiteDatabase.execSQL("DELETE FROM mytable WHERE name='" + name.getText().toString() + "'")

Answer 2

"DELETE FROM mytable WHERE name='"+name.getText().toString()+"';"

Answer 3

Java在引号中发送文本表达式。在你的案例表达中：

  

DELETE FROM mytable WHERE name =＆＃39; name.getText（）＆＃39;;

更改您的代码：

 SignIn_Signup.sqLiteDatabase.execSQL("DELETE FROM mytable WHERE name=\'" + name.getText().toString() + "\';");