Question

我是Alasql的新手，我想知道如何创建一个PIVOT并显示两个聚合。在下面的示例中，如何为每个名称和安全性显示AVG值和价格和。另外，我如何为每个聚合提供别名，即

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    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
    <title>Untitled Document</title>
    <script  type="text/javascript" src="https://rawgit.com/agershun/alasql/develop/dist/alasql.js"></script>
    </head>
    <body>
    <xmp id="output"></xmp>
    <script  type="text/javascript">
    var data = [
        { security: 'Preferred Stock',  name: 'Robert',    value: 5,   price:10 ,  date: '2014-1-3' },
        { security: 'Preferred Stock',  name: 'Robert',    value: 5,   price:10 ,  date: '2014-1-5' },
        { security: 'Common Stock',     name: 'Bert',      value: 20,  price:10 ,  date: '2014-1-6' },
        { security: 'Preferred Stock',  name: 'Elizabeth', value: 10,  price:10 ,  date: '2014-1-6' },
        { security: 'Common Stock',     name: 'Robert',    value: 20,  price:10 ,  date: '2014-1-9' },
        { security: 'Preferred Stock',  name: 'Bert',      value: 20,  price:10 ,  date: '2014-1-11' },
        { security: 'Preferred Stock',  name: 'Robert',    value: 5,   price:10 ,  date: '2014-1-12' },
        { security: 'Preferred Stock',  name: 'Robert',    value: 15,  price:10 ,  date: '2014-1-12' },
        { security: 'Options',          name: 'Bert',      value: 10,  price:10 ,  date: '2014-1-13' },
        { security: 'Preferred Stock',  name: 'Robert',    value: 5,   price:10 ,  date: '2014-1-14' },
        { security: 'Options',          name: 'Robert',    value: 15,  price:10 ,  date: '2014-1-17' }
    ];

    var res = alasql('SELECT name, "Series1" AS SeriesName, security, [value] \
                FROM ?  PIVOT (AVG([value]) FOR security)',[data]);

    print( res );                   

    var res1 = alasql('SELECT name, "Series2" AS SeriesName, security, price \
                FROM ?  PIVOT (SUM([price]) FOR security)',[data]);     
    print( res1 );

    function print(x){
        document.getElementById('output').textContent += JSON.stringify(x,  null, '\t')+"\n";
    }
    </script>
    </body>
    </html>

上面的代码我得到的结果低于结果。

[{
        "name": "Robert",
        "SeriesName": "Series1",
        "Preferred Stock": 7,
        "Common Stock": 20,
        "Options": 15
    },
    {
        "name": "Bert",
        "SeriesName": "Series1",
        "Common Stock": 20,
        "Preferred Stock": 20,
        "Options": 10
    },
    {
        "name": "Elizabeth",
        "SeriesName": "Series1",
        "Preferred Stock": 10
    }
]
[{
        "name": "Robert",
        "SeriesName": "Series2",
        "Preferred Stock": 50,
        "Common Stock": 10,
        "Options": 10
    },
    {
        "name": "Bert",
        "SeriesName": "Series2",
        "Common Stock": 10,
        "Preferred Stock": 10,
        "Options": 10
    },
    {
        "name": "Elizabeth",
        "SeriesName": "Series2",
        "Preferred Stock": 10
    }
]

如何获得以下结果。提前致谢

[{
        "name": "Robert",
        "Series1 - Preferred Stock": 7,
        "Series1 - Common Stock": 20,
        "Series1 - Options": 15 "Series2 - Preferred Stock": 50,
        "Series2 - Common Stock": 10,
        "Series2 - Options": 10
    },
    {
        "name": "Bert",
        "Series1 - Common Stock": 20,
        "Series1 - Preferred Stock": 20,
        "Series1 - Options": 10 "Series2 - Common Stock": 10,
        "Series2 - Preferred Stock": 10,
        "Series2 - Options": 10
    },
    {
        "name": "Elizabeth",
        "Series1 - Preferred Stock": 10 "Series2 - Preferred Stock": 10
    }
]

Answer 1

要附加“系列名称”，您可以像这样修改您的SQL查询。

SELECT name, ("Series1" + security) AS security, [value] \
                    FROM ?  PIVOT (AVG([value]) FOR security)

你可以在这里查看输出..

 https://jsfiddle.net/jit_mehta023/qzdfrg0x/1/

在alasql中的多列上进行透视

1 个答案: