在创建时间维度的代码中添加 SET DATEFIRST 1，表示每周以周一开始
USE db_name
GO
SET NOCOUNT ON
2024年08月31日
在创建时间维度的代码中添加 SET DATEFIRST 1，表示每周以周一开始
USE db_name
GO
SET NOCOUNT ON
2024年08月31日
从 SQL Server 2005 开始，我们在TRY 和 CATCH块的帮助下提供了结构错误处理机制。使用TRY-CATCH的语法如下所示。
2024年08月31日
最进工作中发现明明表数据很少，可是查询很慢，于是就猜想，是不是被锁啦，因此就有了下面语句。当然这些语句也只能解燃眉之急，根本解决办法还需要自己去排查表被锁的原因~~
select request_session_id spid,OBJECT_NAME(resource_associated_entity_id) tableName
2024年08月31日
在以前经常使用mssql server做数据库，现在人工智能席卷全球。今年改用sqlite3做数据库，虽然都是关系型数据库，都支持sql标准语法，但是在实际使用中依然有细微差别。常言道细节决定成败。在自己使用过程中就发现在mssql server经常使用的东西在sqllite3无法运行。有几个遇到情况如下：
2024年08月31日
--分页显示存储过程
if(exists(select * from sys.objects where name='pr_ShowPage'))
drop proc pr_ShowPage
go
create proc pr_ShowPage
(
2024年08月31日
--插入测试数据
select '基层员工' as '范围',21826 as '在职人数',497 as '离职人数',201812 as '时间' into #T
union all
select '主管级及以上员工' as '范围',3904 as '在职人数',40 as '离职人数',201812 as '时间'
union all
select '基层员工' as '范围',21835 as '在职人数',488 as '离职人数',201901 as '时间'
union all
select '主管级及以上员工' as '范围',3883 as '在职人数',19 as '离职人数',201901 as '时间'
union all
select '基层员工' as '范围',21819 as '在职人数',472 as '离职人数',201902 as '时间'
union all
select '主管级及以上员工' as '范围',3900 as '在职人数',36 as '离职人数',201902 as '时间'
union all
select '基层员工' as '范围',22095 as '在职人数',748 as '离职人数',201903 as '时间'
union all
select '主管级及以上员工' as '范围',3914 as '在职人数',50 as '离职人数',201903 as '时间'
union all
select '基层员工' as '范围',22006 as '在职人数',659 as '离职人数',201904 as '时间'
union all
select '主管级及以上员工' as '范围',3927 as '在职人数',63 as '离职人数',201904 as '时间'
union all
select '基层员工' as '范围',22080 as '在职人数',733 as '离职人数',201905 as '时间'
union all
select '主管级及以上员工' as '范围',3935 as '在职人数',71 as '离职人数',201905 as '时间'
union all
select '基层员工' as '范围',22016 as '在职人数',669 as '离职人数',201906 as '时间'
union all
select '主管级及以上员工' as '范围',3935 as '在职人数',71 as '离职人数',201906 as '时间'
union all
select '基层员工' as '范围',22039 as '在职人数',692 as '离职人数',201907 as '时间'
union all
select '主管级及以上员工' as '范围',3911 as '在职人数',47 as '离职人数',201907 as '时间'
union all
select '基层员工' as '范围',22061 as '在职人数',714 as '离职人数',201908 as '时间'
union all
select '主管级及以上员工' as '范围',3934 as '在职人数',70 as '离职人数',201908 as '时间'
union all
select '基层员工' as '范围',21904 as '在职人数',557 as '离职人数',201909 as '时间'
union all
select '主管级及以上员工' as '范围',3913 as '在职人数',49 as '离职人数',201909 as '时间'
union all
select '基层员工' as '范围',21905 as '在职人数',558 as '离职人数',201910 as '时间'
union all
select '主管级及以上员工' as '范围',3902 as '在职人数',38 as '离职人数',201910 as '时间'
union all
select '基层员工' as '范围',21915 as '在职人数',568 as '离职人数',201911 as '时间'
union all
select '主管级及以上员工' as '范围',3907 as '在职人数',43 as '离职人数',201911 as '时间'
union all
select '基层员工' as '范围',21929 as '在职人数',482 as '离职人数',201912 as '时间'
union all
select '主管级及以上员工' as '范围',3905 as '在职人数',41 as '离职人数',201912 as '时间'
select * from #T
?
declare @sql varchar(max) =''
select @sql = @sql+
',max(case when a.时间='+cast(t.时间 as varchar(20))+' then a.在职人数 else NULL end) 在职人数 '+
',max(case when a.时间='+cast(t.时间 as varchar(20))+' then a.离职人数 else NULL end) 离职人数 '+
',max(case when a.时间='+cast(t.时间 as varchar(20))+' then a.时间 else NULL end) 时间 '
from #T t group by t.时间
set @sql = 'select a.范围'+ @sql +'from #T a group by a.范围'
--set @sql = 'select * from #T'
print(@sql)
exec(@sql)