更新 SQLite - “WHERE”附近：语法错误（代码 1 SQLITE_ERROR）：

Posted 2023-04-19

【中文标题】更新 SQLite - “WHERE”附近：语法错误（代码 1 SQLITE_ERROR）：

【英文标题】：Updating SQLite - near "WHERE": syntax error (code 1 SQLITE_ERROR):

【发布时间】：2021-06-09 14:16:33

【问题描述】：

我最近在我的 SQLite 数据库中添加了一个列，因为添加此列是我拥有的一个按钮，该按钮将数据库列之一的值设置为“1”或“0”，现在当该按钮开始使我的应用程序崩溃时尝试使用updateData(),，所以我认为这就是我的问题所在，在updateData()的代码或语法中

错误：

android.database.sqlite.SQLiteException：靠近“WHERE”：语法错误 （代码 1 SQLITE_ERROR）：，编译时：UPDATE my_manager SET location_name = 'Blarney Stone' , location_county = '软木'，location_description = 'jj'，location_route = '1',location_position = '2',location_longg = 'null',location_lat = 'null',location_url = 'JJ',location_url2 = 'jj',location_url3 = 'jj', WHERE location_id = '1' 在 android.database.sqlite.SQLiteConnection.nativePrepareStatement（本机 方法）

代码：

 void updateData(String id, String row_id, String name, String county, String description, String 
  in_route, String position, String lat, String longg, String url, String url2, String url3) 
    System.out.println(TABLE_NAME+"; "+row_id +"; "+ name +"; "+ county+"; "+ description+"; " + lat 
   +"; "+ longg+"; "+ url +"; "+ url2 +"; "+ url3 +"; ");
    SQLiteDatabase db = this.getReadableDatabase();
    db.execSQL("UPDATE " + "my_manager" + " SET location_name = "+"'"+ name + "' " + ", " +
            "location_county = " + "'"+ county + "'"+ "," +
            "location_description = " + "'"+ description +  "'" + "," +
            "location_route = " + "'"+ in_route +  "'" + "," +
            "location_position = " + "'"+ position +  "'" + "," +
            "location_longg = " + "'"+ longg +  "'" + "," +
            "location_lat = " + "'"+ lat +  "'" + "," +
            "location_url = " + "'"+ url +  "'" + "," +
            "location_url2 = " + "'"+ url2 +  "'" + "," +
            "location_url3 = " + "'"+ url3 +  "'" + "," + " WHERE location_id = "+"'"+ row_id+"'");

【问题讨论】：

去掉 WHERE 前的,。

正如@forpas 所说，应该是："location_url3 = " + "'"+ url3 + "' WHERE

不要使用字符串粘贴；使用参数化语句。

删除“，”，干杯，男士们

【参考方案1】：

对不起，我的朋友不要认为这是一件坏事，但如果可能的话，你如何避免不必要的“+”。

void updateData("UPDATE my_manager SET location_name = '"+ name + "', " +
            "location_county = '"+ county + "', " +
            "location_description = '"+ description +  "'," +
            "location_route = '"+ in_route +  "', " +
            "location_position = '" + position + "', " +
            "location_longg = '" + longg + "'," +
            "location_lat = '" + lat +  "'," +
            "location_url = '" + url +  "', " +
            "location_url2 = '"+ url2 +  "', " +
            "location_url3 = '"+ url3 +  "' WHERE location_id = '"+ row_id+"'");