Question

我在一个相当复杂的选择查询中的名为games._id的列上得到一个Sqlite不明确的列名，如下所示：

public Cursor getStatsByResult(String result)
{
    SQLiteDatabase db = this.getReadableDatabase();

    String buildSQL = "SELECT games._id AS game, games.lge, games.date, games.opp, games.ven, games.scr, " +
            "SUM(CASE WHEN s_event = \"1on1\" THEN s_att END) ||\"/\"||"+
            "SUM(CASE WHEN s_event = \"1on1\" THEN s_point END) AS \"1 On 1 \","+
            "SUM(CASE WHEN s_event = \"MyDef\" THEN s_att END) ||\"/\"|| "+
            "SUM(CASE WHEN s_event = \"MyDef\" THEN s_point END) AS \"Switching Def\","+
            "SUM(CASE WHEN s_event = \"Defl\" THEN s_point END) AS Deflections "+
            "FROM records "+
            "INNER JOIN myplayers ON myplayers_id = s_myplayersid "+
            "INNER JOIN games ON games._id = myplayers_gameid "+
            "INNER JOIN games ON sessions.sessions_id = games.sessions_id AND games._id = myplayers.myplayers_game_id "+
            "WHERE games.result=\""+result+"\" AND games.date BETWEEN sessions.sessions_start AND sessions.sessions_end GROUP BY "+
            "games.date,games.rslt,games.opp";

    return db.rawQuery(buildSQL, null);

}

为什么它仍然会显示此消息，即使我放了games._id而不仅仅是_id？

Answer 1

我认为您已经尝试了别名，问题在于别名。我想是的。

String buildSQL = "SELECT games._id , games.lge, games.date, games.opp, games.ven, games.scr, " +
            "SUM(CASE WHEN s_event = \"1on1\" THEN s_att END) ||\"/\"||"+
            "SUM(CASE WHEN s_event = \"1on1\" THEN s_point END) AS \"1 On 1 \","+
            "SUM(CASE WHEN s_event = \"MyDef\" THEN s_att END) ||\"/\"|| "+
            "SUM(CASE WHEN s_event = \"MyDef\" THEN s_point END) AS \"Switching Def\","+
            "SUM(CASE WHEN s_event = \"Defl\" THEN s_point END) AS Deflections "+
            "FROM records game"+
            "INNER JOIN myplayers ON myplayers_id = s_myplayersid "+
            "INNER JOIN games ON games._id = myplayers_gameid "+
            "INNER JOIN games ON sessions.sessions_id = games.sessions_id AND games._id = myplayers.myplayers_game_id "+
            "WHERE games.result=\""+result+"\" AND games.date BETWEEN sessions.sessions_start AND sessions.sessions_end GROUP BY "+
            "games.date,games.rslt,games.opp";

希望此查询解决您的问题。

Android中的Sqlite模糊列名称为什么没有解决方案不起作用

1 个答案: