Question

我正在尝试为报告生成表单执行日期过滤。我有一个带有此复选框的DateTimePicker，如果选中复选框，查询将添加一个WHERE子句。

目前我这样做： -

         If DateTimePicker1.Checked Then
              query = "SELECT payment_type, sales_payment_dtl.payment_amt, payment_remark, sales_payment_dtl.created_date, sales.inv_no
                    FROM sales_payment_dtl
                    INNER JOIN sales_payment
                    ON sales_payment_dtl.payment_id = sales_payment.payment_id
                    INNER JOIN sales
                    ON sales_payment.sales_id = sales.sales_id
                    WHERE sales_payment_dtl.created_date = '"& DateTimePicker.Text &"'"
         Else
              query = "SELECT payment_type, sales_payment_dtl.payment_amt, payment_remark, sales_payment_dtl.created_date, sales.inv_no
                    FROM sales_payment_dtl
                    INNER JOIN sales_payment
                    ON sales_payment_dtl.payment_id = sales_payment.payment_id
                    INNER JOIN sales
                    ON sales_payment.sales_id = sales.sales_id"
         End If

是否可以缩短代码？因为我将来需要添加更多的过滤器，那么代码会变得很长，也许是这样的？

 query = "SELECT payment_type, sales_payment_dtl.payment_amt, payment_remark, sales_payment_dtl.created_date, sales.inv_no
                    FROM sales_payment_dtl
                    INNER JOIN sales_payment
                    ON sales_payment_dtl.payment_id = sales_payment.payment_id
                    INNER JOIN sales
                    ON sales_payment.sales_id = sales.sales_id

                    IF '"& DateTimePicker.Checked = True &"' THEN 
                    WHERE sales_payment_dtl.created_date = '"& DateTimePicker.Text &"'
                    ELSE 
                    do nothing"

Answer 1

简单的逻辑。

    query = "SELECT payment_type, sales_payment_dtl.payment_amt, payment_remark, sales_payment_dtl.created_date, sales.inv_no " & _
    "FROM(sales_payment_dtl) " & _
    "INNER JOIN sales_payment " & _
    "ON sales_payment_dtl.payment_id = sales_payment.payment_id " & _
    "INNER JOIN sales " & _
    "ON sales_payment.sales_id = sales.sales_id"

    If DateTimePicker1.Checked Then
        query &= " WHERE sales_payment_dtl.created_date = '" & DateTimePicker.Text & "'"
    End If

如何缩短MySQL代码？

1 个答案: