Question

我在Access

中有这个咨询

    document.getElementById(shortname).addEventListener('click', function() {
    copyToClipboardMsg(document.getElementById('$id'), 'msg');
});
function copyToClipboardMsg(elem, msgElem) {
      var succeed = copyToClipboard(elem);
    var msg;
    if (!succeed) {
        msg = 'Copy not supported or blocked.  Press Ctrl+c to copy.'
    } else {
        msg = 'Text copied to the clipboard.'
    }
    if (typeof msgElem === 'string') {
        msgElem = document.getElementById(msgElem);
    }
    msgElem.innerHTML = msg;
    setTimeout(function() {
        msgElem.innerHTML = '';
    }, 2000);
}

function copyToClipboard(elem) {
      // create hidden text element, if it doesn't already exist
    var targetId = '_hiddenCopyText_';
    var isInput = elem.tagName === 'INPUT' || elem.tagName === 'TEXTAREA';
    var origSelectionStart, origSelectionEnd;
    if (isInput) {
        // can just use the original source element for the selection and copy
        target = elem;
        origSelectionStart = elem.selectionStart;
        origSelectionEnd = elem.selectionEnd;
    } else {
        // must use a temporary form element for the selection and copy
        target = document.getElementById(targetId);
        if (!target) {
            var target = document.createElement('textarea');
            target.style.position = 'absolute';
            target.style.left = '-9999px';
            target.style.top = '0';
            target.id = targetId;
            document.body.appendChild(target);
        }
        target.textContent = elem.textContent;
    }
    // select the content
    var currentFocus = document.activeElement;
    target.focus();
    target.setSelectionRange(0, target.value.length);

    // copy the selection
    var succeed;
    try {
          succeed = document.execCommand('copy');
    } catch(e) {
        succeed = false;
    }
    // restore original focus
    if (currentFocus && typeof currentFocus.focus === 'function') {
        currentFocus.focus();
    }

    if (isInput) {
        // restore prior selection
        elem.setSelectionRange(origSelectionStart, origSelectionEnd);
    } else {
        // clear temporary content
        target.textContent = '';
    }
    return succeed;
}

这里的一切都很好我得到了我想要的东西，但现在我需要在咨询SELECT CREDITOS.Id AS [Num Credito], CREDITOS.CLIENTE AS [Cedula Cliente], CLIENTES.NOMBRES AS [Nombres Cliente], CLIENTES.APELLIDOS AS [Apellidos Cliente], CREDITOS.FECHA_INICIAL AS [Fecha Inicial], CREDITOS.FECHA_FINAL AS [Fecha Final], CREDITOS.CONCEPTO AS [Concepto], CREDITOS.VALOR_CREDITO AS [Valor], CREDITOS.NUMERO_CUOTAS AS [Numero Cuotas], CREDITOS.MONTO AS [Monto], CREDITOS.PORCENTAJE AS [Porcentaje], CREDITOS.UTILIDAD AS [Utilidad], CREDITOS.VALOR_CUOTAS AS [Valor Cuotas], CREDITOS.EMPLEADO AS [Cedula Empleado], EMPLEADOS.NOMBRES AS [Nombres Empleado], EMPLEADOS.APELLIDOS AS [Apellidos Empleado], Nz(t.Conteo,0) AS [Días de retraso] FROM (CLIENTES INNER JOIN (EMPLEADOS INNER JOIN (CREDITOS LEFT JOIN ( SELECT CREDITOS.Id AS Cred, Count(RECAUDOS.Id) AS Conteo FROM CREDITOS INNER JOIN RECAUDOS ON(CREDITOS.Id = RECAUDOS.CREDITO AND CREDITOS.VALOR_CUOTAS = RECAUDOS.SALDO) GROUP BY CREDITOS.Id ) AS t ON CREDITOS.Id = t.Cred) ON EMPLEADOS.ID = CREDITOS.EMPLEADO) ON CLIENTES.Id = CREDITOS.CLIENTE)中添加一个列，但是当我在第一个SUM(RECAUDOS.VALOR_RECAUDO)之前添加该列时，我得到了错误{ {1}}。我认为这个问题是因为FROM Your query does not include the specified expression 'Num Credito' as part of an aggregate function INNER JOIN，但是我需要计算表格RECAUDOS中符合此条件{{1}的记录}，但是现在我需要每个ON(CREDITOS.Id = RECAUDOS.CREDITO AND CREDITOS.VALOR_CUOTAS = RECAUDOS.SALDO)的所有RECAUDOS的总和，即使这个总数为零，请我真的需要帮助

Answer 1

只需将新聚合添加到派生表（JOIN子句中的嵌套LEFT JOIN ( SELECT CREDITOS.Id AS Cred, Count(RECAUDOS.Id) AS Conteo, SUM(RECAUDOS.VALOR_RECAUDO) AS new_field FROM CREDITOS INNER JOIN RECAUDOS ON(CREDITOS.Id = RECAUDOS.CREDITO AND CREDITOS.VALOR_CUOTAS = RECAUDOS.SALDO) GROUP BY CREDITOS.Id ) AS t查询），然后在外部主查询中引用它，就像使用 t.Conteo ：

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Answer 2

对于这个解决方案，对Parfait gime的一个好主意，问题在于子查询，最准确的是在INNER JOIN... ON(CREDITOS.Id = RECAUDOS.CREDITO AND CREDITOS.VALOR_CUOTAS = RECAUDOS.SALDO) Sum(RECAUDOS.VALOR_RECAUDO)的条件下我不知道为什么给我所有的零这些行，但我认为对于所有与INNER JOIN中的条件不匹配的值，由于obius原因而给我null ...所以，我以这种方式离开JOIN INNER JOIN... ON(CREDITOS.Id = RECAUDOS.CREDITO)现在{{1做他的工作，问题是SUM()，我需要条件COUNT()来计算，如果我为JOIN CREDITOS.VALOR_CUOTAS = RECAUDOS.SALDO删除它们将“计算”所有行在COUNT()中（没有条件），所以我设想了这个this，所以我将RECAUDOS替换为Count(RECAUDOS.Id)，现在一切都在轨道上，最后的咨询是这样的：

Count(IIf(CREDITOS.VALOR_CUOTAS = RECAUDOS.SALDO, 1, Null))

使用SUM（）在Access中进行咨询

2 个答案: