❶ sql语句合并
你都写成xx你不会看晕吗?
insertintoxxx(xx,yy,zz)selectxx,yy,idfromyyywhereid=5
❷ 多条sql语句如何拼接
SQL语句拼接一般使用【union all】和【union】
两者的区别是:
【union all】:显示多条语句里的全部记录;
【union】:显示多条语句里的不重复的记录,也就是有DIstinct的功效;
【union all】示例:
select'2016-02-06'date_timeunionall
select'2016-02-14'unionall
select'2016-06-12'unionall
select'2016-09-18'unionall
select'2016-10-09'unionall
select'2016-10-09'
结果为6行
【union】示例:
select'2016-02-06'date_timeunionall
select'2016-02-14'unionall
select'2016-06-12'unionall
select'2016-09-18'unionall
select'2016-10-09'unionall
select'2016-10-09'
结果为5行
❸ sql语句 组合问题
你确定是所有组合吗?比如你有3个值a,b,c,那么所有组合就是3+3^2+3^3=39条记录。这其实就是笛卡尔积啊。
selecta,bfromtestunionall--一个的
selectt1.a+t2.a,t1.b+','+t2.bfromtest05t1,testt2unionall--二个的
selectt1.a+t2.a+t3.a,t1.b+','+t2.b+','+t3.bfromtestt1,testt2,testt3--三个的
结果如下:
❹ sql语句 两条sql语句怎么合并在一起
方法/步骤
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 )
❺ 插入和查询SQL语句组合
insert into table_a (aaa,bbb,ccc)
SELECT 111
,222
,id
FROM table_b
❻ 这两个sql 语句怎么组合在一起
select * from ( select top 20 ,(select count(*) from dp_Comments where dp_Comments.c_TextID= dp_Gossip.g_ID) as cnt from dp_Gossip ) as stas inner join (select top 20 * from (select ROW_NUMBER() OVER (order by g_PublishTime desc) AS RowNumber,* from dp_Gossip)A) as stf where stf.RowNumber > 20*(2-1)
order by stas.cnt desc
❼ 急求 SQL 组合语句
select * from 表名称 where l_customer+l_year+l_mouth+convert(varchar,l_amt) in (select l_customer+l_year+l_mouth+convert(varchar,l_amt) FROM (select l_customer,l_year,l_mouth,max(l_amt) l_amt from 表名称 group by l_customer,l_year,l_mouth) as a)
❽ 如何把两条SQL语句合并
insert into sum1(fullwork, parttime) select count(staffKind='全职'), count(staffKind='兼职') from basicInfo