Question

我用Google搜索并搜索了这个地方，但不是我能找到的答案，因为其他人的情况有所不同。

USE TestDatabase
Select Firstname,Lastname,Salary From Employee as E 
Join JobTitle as J
on E.JobTitleID = J.JobTitleID

WHERE Salary 
BETWEEN $25000.00 AND $50000.00

这有效，但我试图显示JobTitle表中的两列，我不知道要搜索哪些字词或谷歌，也不能找到一个简单的答案。任何人都可以帮助一些人，但我很困惑。我正在使用server 2008 t-sql for school

Answer 1

您可以使用JobTitle表{/ 1}}的别名来选择要选择的任何额外列

Answer 2

使用别名设置您在该字段中使用的表格。

Select
    E.Firstname,E.Lastname,E.Salary,
    j.JobTitle, j.Otherfieldyouwanttoselect
From Employee as E Join JobTitle as J on E.JobTitleID = J.JobTitleID
WHERE
    Salary BETWEEN $25000.00 AND $50000.00

Answer 3

Select E.Firstname, E.Lastname, E.Salary, J.Column1, J.Column2
    From Employee as E 
        Join JobTitle as J
            on E.JobTitleID = J.JobTitleID
    WHERE E.Salary BETWEEN $25000.00 AND $50000.00

Answer 4

你是说这个意思吗？

USE TestDatabase
Select Firstname,Lastname,Salary,J.YourcolumnfromJobTitle  From Employee as E 
Join JobTitle as J
on E.JobTitleID = J.JobTitleID

WHERE Salary 
BETWEEN $25000.00 AND $50000.00

Answer 5

你应该为这两个表使用别名：

USE TestDatabase
Select E.Firstname,E.Lastname,E.Salary,J.Column1,j.Column2 From Employee as E 
Join JobTitle as J
on E.JobTitleID = J.JobTitleID

WHERE E.Salary 
BETWEEN $25000.00 AND $50000.00

使用“选择”连接两个表，仅显示几列，并且还具有两个条件

5 个答案: