Question

此查询有效

SELECT 
    branch
    , total
    , typeA/1.2 AS [A]
    , typeB/1.2 AS [B]
    , dates
    , (typeA / 1.2 + typeB / 1.2) * 0.2 AS [V]
    , (typeA / 1.2 + typeB / 1.2) * 0.2 + typeA / 1.2 + typeB / 1.2 - total AS [DIFF]
FROM 
    detail
WHERE
    (branch = 'SW1'
     AND method in ('Visa', 'Mcard') OR branch = 'SW1'
     AND method = 'Coupon'
     AND receipt = 'Y' OR branch = 'SW1' 
     AND method = 'Coupon'
     AND qty <= 7)
    AND dates Between '04/01/2015' And '04/30/2015'
ORDER BY 
    dates;

但我需要从表单中的控件获取分支数据，如

Select("branch = " + ComboBox1.Text).FirstOrDefault();

我在查询中有3个引用分支的条件。如何删除对同一分支的多个引用，以便我可以在c＃中使用表单控件。我有尝试将分支转移到各种各样的职位之后 WHERE子句

Answer 1

通过反复试验解决了问题。从Where子句开始如下

WHERE  dates Between '04/01/2015' And '04/30/2015' 
       AND (method in ('Visa','MCard') 
       OR method= 'Coupon'AND receipt='Y'
       OR method='Coupon' AND qty<=5)
       AND branch='SW1'

修改SQL查询以允许表单条件

1 个答案: