我遇到以下错误:
信息209,级别16,状态1,第3行,列名称“ NUM_0”不明确。
SELECT BPR_0, BPAPAY_0, BPYNAM_0, BPYADDLIG_0, NUM_0 -- and so on
FROM PROD.SINVOICE, PROD.SINVOICED
WHERE SINVOICE.NUM_0 = SINVOICED.NUM_0
答案 0 :(得分:1)
使用表alise
明确限定列名:
select sin.col, . . ., sind.col, . . ., c.col, . . .
from prod.sininvoice sin inner join
prod.sininvoiced sind
on sind.num_0 = sin_num_0 inner join
prod.customer c
on . . .;
答案 1 :(得分:0)
由于SINVOICE和SINVOICED表中都存在“ NUM_0”列,因此您需要使用别名来指定该列。
例如,您选择select语句中的SINVOICE.NUM_O或SINVOICED.NUM_O取决于要从哪个表中此列值。
答案 2 :(得分:0)
正确使用Alias
示例
SELECT o.OrderID, o.OrderDate, c.CustomerName
FROM Customers AS c, Orders AS o
WHERE c.CustomerName="Around the Horn" AND c.CustomerID=o.CustomerID;
针对您的情况
select t1.col1,t1.col2 ....t1.coln from yourtable t1
inner join yourtable t2 on t1.num0=t2.num0