Sql 此声明较短/按顺序
我能把这句话写短一点吗Sql 此声明较短/按顺序,sql,Sql,我能把这句话写短一点吗 Select S_name from Supplier JOIN Nation ON Supplier.S_nationkey = Nation.N_nationkey JOIN Region on Nation.n_regionkey = region.R_regionkey Where Region.r_name = 'AFRICA' Union Select C_name from Customer JOIN Nation ON
Select S_name
from
Supplier
JOIN Nation ON Supplier.S_nationkey = Nation.N_nationkey
JOIN Region on Nation.n_regionkey = region.R_regionkey
Where
Region.r_name = 'AFRICA'
Union
Select C_name
from
Customer
JOIN Nation ON Customer.C_Nationkey = Nation.N_nationkey
JOIN Region on Nation.N_regionkey = Region.R_regionkey
Where
Region.R_name = 'AFRICA'
我想按名称对输出进行排序,但我不知道为什么,因为我有C_名称和S_名称作为输出
谢谢至于order by子句,请尝试
ORDER BY 1
在查询结束时如果希望所有数据都在同一列中,则可以在其周围放置一个
选择
,然后按进行排序
Select S_name As Names
from Supplier
JOIN Nation
ON Supplier.S_nationkey = Nation.N_nationkey
JOIN Region
on Nation.n_regionkey = region.R_regionkey
Where Region.r_name = 'AFRICA'
Union
Select C_name As Names
from Customer
JOIN Nation
ON Customer.C_Nationkey = Nation.N_nationkey
JOIN Region
on Nation.N_regionkey = Region.R_regionkey
Where Region.R_name = 'AFRICA'
ORDER BY Names
如果不需要同一列中的数据,则可以这样做:
Select S_name, c.C_name
from Supplier
JOIN Nation
ON Supplier.S_nationkey = Nation.N_nationkey
JOIN Region
on Nation.n_regionkey = region.R_regionkey
JOIN Customer c
on Nation.N_nationkey = c.C_Nationkey
Where Region.r_name = 'AFRICA'
ORDER BY S_name, c.c_name
您使用的是什么数据库管理系统?(mssql、mysql或oracel)?如果您希望S_name和C_name一起在一列中输出,则不能真正缩短它。考虑使用<代码>联合所有< /代码>,以使结果不被重复,然后只向它们添加别名>代码> SyNEX,作为名称< /COD> <代码> CyNeX作为名称< /C> >按代码< >按名称< /Cord>排序。在EndUn中,您不需要外部<代码>选择< /COD>或括号。代码>选择。。。联合选择。。。按姓名排序就行了。