Question

我有一个包含多个值的视图。该视图被直接调用到我的ERP中的下拉列表中。我想知道是否可以根据ERP中的另一个字段来限制此视图的值？

使用字段打开表单的页面将调用3个过程：before_open，before_close，after_save

我找不到任何信息。

我已经尝试过使用where子句来限制值，但是它没有用。

//我的观点

CREATE VIEW Values
AS
SELECT N_values = 1 , Value = 'Working'
UNION ALL
SELECT N_values = 2 , Value = 'Pause'
UNION ALL
SELECT N_values = 3 , Value = 'Home'
UNION ALL 
SELECT N_values = 4 , Value = 'Vacations'
GO

///要限制值，我这样做是在ID像1,5,6

IF(field = 'Not at work') SELECT field FROM view WHERE N_values IN(3,4)

我希望下拉列表的输出仅为[N_values] 3和4，但是我得到了所有列表。

Answer 1

您是否正在寻找where子句？

SELECT field
FROM view
WHERE (@field = 'Not at work' and N_values IN (3, 4)) OR
      (@field <> 'Not at work');

Answer 2

为什么不添加其他（计算列）working

CREATE VIEW Values
AS
SELECT N_values = 1 , Value = 'Working'
UNION ALL
SELECT N_values = 2 , Value = 'Pause'
UNION ALL
SELECT N_values = 3 , Value = 'Home'
UNION ALL 
SELECT N_values = 4 , Value = 'Vacations'
GO


//this view add a 'calculated field' that is true if forking
CREATE VIEW values_extended AS
SELECT *, case when n_values >2 then 'not-working' else 'working' end
FROM values
GO

所以你可以选择

select n_values, Value
from value_extended
where working like 'not-working'

会给你

3, Home
4, Vacations

是否可以限制SQL视图的值？

2 个答案: