Question

我需要结合查看同一个表中的SELECT语句的2个结果。

我的工作有效，但我确信有更好的方法可以做到。

SELECT  
    games._id,win.winner,deal.dealer
FROM
    games,
    (SELECT 
         players.name as winner
     FROM 
         games, players
     WHERE 
         players._id = games.winner 
         AND  games._id = 2) AS win,
    (SELECT 
         players.name as dealer
     FROM  
         games, players
     WHERE 
         players._id = games.dealer 
         AND  games._id = 2) AS deal
WHERE 
    games._id = 2

感谢您帮助优化此查询。

编辑：

表的架构是：

CREATE TABLE games 
(
     _id INTEGER PRIMARY KEY,
     winner integer, 
     dealer integer
)

CREATE TABLE players 
(
     _id INTEGER PRIMARY KEY, 
     name text
)

Answer 1

下面的内容（未经测试的代码）应该有效：

    protected override XmlReader GetReaderForMessage(SoapClientMessage message, int bufferSize)
    {
        var newStream = new MemoryStream();
        var orgStream = message.Stream;
        byte[] buf = new byte[bufferSize];
        orgStream.Read(buf, 0, bufferSize);
        string response = Encoding.UTF8.GetString(buf);            
        int pos = response.IndexOf("Response xmlns=");
        if (pos == -1)
        {
            pos = response.IndexOf("Response>");
            if (pos > -1)
                response = response.Insert(pos + 8, " xmlns=\"http://tempuri.org/\"");
        }
        if (pos > -1)
        {
            int pos2 = pos + 8;
            int pos3 = pos + 14;
            while (response[--pos-1] != '<') ;
            string tagName = response.Substring(pos, pos2 - pos);
            response = response.Insert(pos3, ":ns2").Insert(pos, "ns2:");
            int pos4 = response.IndexOf("</" + tagName) + 2;
            response = response.Insert(pos4, "ns2:");
        }
        StreamWriter sw = new StreamWriter(newStream, Encoding.UTF8);
        sw.WriteLine(response);
        sw.Flush();
        newStream.Position = 0;
        return new System.Xml.XmlTextReader(newStream);
    }

Sqlite - 组合来自同一个表的2个SELECT语句

1 个答案: