Question

您好，那些3“PE_ ..”我首先在创建时添加值，并且那些3“et .._ getText（）。toString（）..”由用户获取新的更改。你明白了吗？仍然我的应用程序停止，因为我在db下面调用update方法：

controller.update_pw(PE_Desc, PE_Pass, PE_Note, etDesc.getText().toString(), etPass.getText().toString(), etNote.getText().toString());

这是我在我的数据库上的更新方法：

public void update_pw(String old_description, String old_password, String old_note, String new_description, String new_password, String new_note){
    this.getWritableDatabase().execSQL("UPDATE PASSWALL SET PW_DESC='"+new_description+"', PW_PASS='"+new_password+"', PW_NOTE='"+new_note+"' " +
            "WHERE PW_DESC='"+old_description+"', PW_PASS='"+old_password+"', PW_NOTE='"+old_note+"'");

我想知道“PW_DESC =''，PW_PASS =''，PW_NOTE =''WHERE ...”之间的逗号，这是正确的吗？需要帮助，感谢您的建议。谢谢！

Answer 1

您在 WHERE 子句中缺少 AND 条件必须由 AND 运算符分隔。

<强>编辑：更新值的另一种方法。

ContentValues newValues = new ContentValues();
newValues.put("PW_DESC", new_description);
newValues.put("PW_PASS", new_password);
newValues.put("PW_NOTE", new_note);
SQLiteDatabase db=getReadableDatabase();
db.update("PASSWALL", newValues, "PW_DESC= '" + old_description + "' AND "+"PW_PASS= '" +old_password+ "' AND "+ "PW_NOTE= '" + old_note+ "'", null);

Answer 2

试试这个，

     public void update_pw(String old_description, String old_password, String old_note, String new_description, String new_password, String new_note) {

            SQLiteDatabase db = this.getWritableDatabase();
            String strSQL = "UPDATE PASSWALL SET PW_DESC='" + new_description + "', PW_PASS='" + new_password + "', PW_NOTE='" + new_note + "' WHERE PW_DESC='" + old_description + "' AND PW_PASS='" + old_password + "' AND PW_NOTE='" + old_note + "'";
            db.execSQL(strSQL);
        }

SQLite数据库 - 更新查询

2 个答案: