Question

我的查询是

select distinct PoNo, PoDate, SupplierId, BillNo
FROM Purchase_Product
order by  PoNo

如下所示 order

但我需要PO0001，Po0002，PO0003，PO0004 ......

所以，我正在使用

select distinct PoNo, PoDate, SupplierId, BillNo
FROM Purchase_Product
order by SUBSTRING(PoNo,5,1)

但是它显示了像

这样的错误

如果SELECT DISTINCT为，则
ORDER BY项必须出现在选择列表中指定。帮帮我

Answer 1

您可以改为使用GROUP BY：

SELECT PoNo, PoDate, SupplierId, BillNo
FROM Purchase_Product
GROUP BY PoNo, PoDate, SupplierId, BillNo
ORDER BY SUBSTRING(PoNo, 5, 1)

Answer 2

您也可以尝试以下一个：

SELECT PoNo, PoDate, SupplierId, BillNo
FROM (
    select distinct CAST(SUBSTRING(PoNo,2,LEN(PoNo)-2) AS INT) AS Pid, PoNo, PoDate, SupplierId, BillNo
    FROM Purchase_Product
) AS tbl
order by  Pid

Answer 3

2.6

从SELECT PoNo, PoDate, SupplierId, BillNo FROM Purchase_Product GROUP BY PoNo, PoDate, SupplierId, BillNo ORDER BY Cast(SUBSTRING(PoNo, 3, len(PoNo)) as int)中提取数字并按该数字排序。

如何在sql server 2008中使用不同的SUBSTRING

3 个答案: