‘壹’ sql怎样合并表中两列的值为一列来显示
select concat(name,id) as nameid,age
from example
具体可以参考:网页链接
‘贰’ sql中如何将多列用一点合并成一列查询出
select (segment1(01)+'.'+segment2(01-02-03)+'.'+segment3(0000)) as 别名
‘叁’ sql 怎样合并列 将一行中多列 合并成指定数量的列
先转字符型再加就可以了。
select id,cast(col1 as varchar) + '~' + cast(col2 as varchar) as col from 你的表
‘肆’ 怎样用SQL语句合并两个表中的两个列
你给个条件好让两条合并成一条啊。如
select a.names, b.names as typ from table1 as a ,table2 as bwhere a.id=b.id
‘伍’ SQL 多行多列数据清洗合并为一行
SELECT
A,
GROUP_CONCAT( B SEPARATOR ',' ),
GROUP_CONCAT( C SEPARATOR ',' )
FROM
table_name
GROUP BY
A
1.GROUP_CONCAT()中的值为你要合并的数据的字段名;
2.SEPARATOR 函数是用来分隔这些要合并的数据的 ,' ' 中是你要用哪个符号来分隔,可以直接不填符号默认为空值;
2.必须要用GROUP BY 语句来进行分组管理,不然所有的数据都会被合并成一条记录
参考链接
https://www.cnblogs.com/shoshana-kong/p/11147690.html
‘陆’ SQL Server 列合并
创建表,数据
createtable表1
(idint,
qtyint)
createtable表2
(idint,
aaaint)
insertinto表1values(1,2)
insertinto表1values(1,3)
insertinto表1values(2,4)
insertinto表2values(1,5)
insertinto表2values(2,3)
insertinto表2values(2,6)
执行:
selecta.id,a.qty,b.aaafrom
(selectid,qty,row_number()over(partitionbyidorderbyqty)rnfrom表1)ainnerjoin
(selectid,aaa,row_number()over(partitionbyidorderbyaaa)rnfrom表2)bona.id=b.idanda.rn=b.rn
union
selecta.id,a.qty,b.aaafrom
(selectid,qty,row_number()over(partitionbyidorderbyqty)rnfrom表1)aleftjoin
(selectid,aaa,row_number()over(partitionbyidorderbyaaa)rnfrom表2)bona.id=b.idanda.rn=b.rn
union
selecta.id,b.qty,a.aaafrom
(selectid,aaa,row_number()over(partitionbyidorderbyaaa)rnfrom表2)aleftjoin
(selectid,qty,row_number()over(partitionbyidorderbyqty)rnfrom表1)bona.id=b.idanda.rn=b.rn
结果:
‘柒’ SQL怎么列合并
1、我用Toad做演示,我先新建两张table,create table #AA(ID int,name nvarchar(10),age int)
create table #BB(ID int,name nvarchar(10),age int )。