我正在尝试获取特定日期的第一个收货号和最后一个收货号。有没有办法在一句话中得到它？我可以使用2条语句来获得它，如下所示：
cnn.Open()
query = "select top 1(invoice) from invoice_tbl where transaction_date = @transaction_date order by invoice Desc"
cmd = new sqlCommand(query,cnn)
.......
和
cnn.Open()
query = "select top 1(invoice) from invoice_tbl where transaction_date = @transaction_date order by invoice Asc"
cmd = new sqlCommand(query,cnn)
.......
我可以在单个语句中获取展位值并将其放置在变量中，以便将其分别放置在两个标签上吗？
谢谢！
尝试这个
select
(select top 1(invoice)
from invoice_tbl
where transaction_date = @transaction_date order by invoice Desc) as last_inv ,
(select top 1(invoice)
from invoice_tbl
where transaction_date = @transaction_date order by invoice Asc) as First_inv
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我来说两句