SQL数据-以特定格式编码json

Question

我有与sql一起使用的php代码，可从基于EA编号和ID编号的数据库中获取结果以图形化它们。

<?php   
            $sql=
                ("SELECT D as y,Total as a,PoweredOn as b 
                FROM MasterUsageTable 
                WHERE ID IN 
                (SELECT ID FROM MasterUsageTable
                WHERE EA_Number = '$valueEA' AND D BETWEEN #$valueSDate# AND #$valueEDate#)");

            $rs = odbc_exec($con, $sqlVMs);
            if (!$rs) {
                exit("Enter EA!");
            }
            $data = array();
                while ($row = odbc_fetch_array($rs)){
                    $data[] = $row;
                }           

            echo json_encode($data);
        ?>

目前，我在json编码后获取结果的方式是这样的：

[{“ y”：“ 2015-03-26”，“ a”：“ 16”，“ b”：“ 14”}，{“ y”：“ 2015-03-26”，“ a”：“ 59 “，” b“：” 12“}，{” y“：” 2015-03-26“，” a“：” 21“，” b“：” 5“}，{” y“：” 2015-03 -26“，” a“：” 35“，” b“：” 12“}，{” y“：” 2015-03-26“，” a“：” 17“，” b“：” 2“} ]

我希望可以通过某种方式将它们分开：

[{“ y”：“ 2015-03-26”，“ a”：“ 16”，“ b”：“ 14”}，{“ y”：“ 2015-03-26”，“ a”：“ 59 “，” b“：” 12“}，{” y“：” 2015-03-26“，” a“：” 21“，” b“：” 5“}]]，[{” y“：” 2015 -03-26“，” a“：” 35“，” b“：” 12“}，{” y“：” 2015-03-26“，” a“：” 17“，” b“：” 2 “}]

因此，它是基于其ID的多个数据数组。 希望有道理，谢谢

Answer 1

一种方法是使用ID进行外循环，并使用内循环为每个ID值检索值，如下所示：

<?php
// test data
$valueSDate = "2015-03-26";
$valueEDate = "2015-03-26";
$valueEA = "EA1";

$allData = array();
$con = odbc_connect(
        "Driver={Microsoft Access Driver (*.mdb, *.accdb)};" .
        "Dbq=C:\\Users\\Public\\Database1.accdb;",
        "Admin", "");
$rs1 = odbc_exec($con, 
        "SELECT DISTINCT ID " .
        "FROM MasterUsageTable " .
        "WHERE EA_Number = '$valueEA' " .
            "AND D BETWEEN #$valueSDate# AND #$valueEDate#");
while ($row1 = odbc_fetch_array($rs1)) {
    $id = $row1["ID"];
    $rs2 = odbc_exec($con, 
            "SELECT D as y,Total as a,PoweredOn as b " .
            "FROM MasterUsageTable " .
            "WHERE ID = $id AND EA_Number = '$valueEA' " .
                "AND D BETWEEN #$valueSDate# AND #$valueEDate#");
    $idData = array();
    while ($row2 = odbc_fetch_array($rs2)) {
        $idData[] = $row2;
    }
    $allData[] = $idData;
}

echo json_encode($allData);