我的所有专栏详情如下：
SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'table1'
AND DATA_TYPE IN ('int','decimal','numeric')
我的表格结构如下：
CREATE TABLE [dbo].[table1](
[col1] int not NULL,
[col2] [numeric](7, 0) NULL,
[col3] [varchar](30) NULL,
[col4] [varchar](8) NULL,
[col5] [varchar](2) NULL,
[col6] [varchar](8) NULL,
[col7] [varchar](3) NULL,
[col8] [varchar](7) NULL,
[col9] [varchar](5) NULL,
[col10] [varchar](8) NULL,
[col11] [numeric](7, 0) NULL,
[col12] [numeric](7, 3) NULL,
[col13] [numeric](7, 2) NULL,
[col14] [decimal](7, 2) NULL,
[col15] [varchar](1) NULL,
) ON [PRIMARY]
以下是我查询table1时的几个示例值
col1 col2 col11 col12 col13 col14
------------------------------------------------------------
1 10.0 80.00 10.000 12.00 90.00
2 70.0 10.00 97.960 14.00 10.00
3 30.00 12.00 14.000 115.00 11.00
4 40.00 11.00 15.000 15.80 12.00
我希望我的结果如下：
for max:
Table_name max_col_name max_col_value max_col_value_length
---------------------------------------------------------------------
table1 col3 115.00 6
for min value:
Table_name min_col_name min_col_value min_col_value_length
---------------------------------------------------------------------
table1 col1 1 1
我怎样才能实现这个目标？
答案 0 :(得分：0)
您可以使用以下代码来获得所需的结果。如果列名是动态的，那么您可以轻松地将以下代码转换为动态sql。
CREATE TABLE [dbo].[table1](
[col1] int not NULL,
[col2] [numeric](7, 0) NULL,
[col3] [varchar](30) NULL,
[col4] [varchar](8) NULL,
[col5] [varchar](2) NULL,
[col6] [varchar](8) NULL,
[col7] [varchar](3) NULL,
[col8] [varchar](7) NULL,
[col9] [varchar](5) NULL,
[col10] [varchar](8) NULL,
[col11] [numeric](7, 0) NULL,
[col12] [numeric](7, 3) NULL,
[col13] [numeric](7, 2) NULL,
[col14] [decimal](7, 2) NULL,
[col15] [varchar](1) NULL,
) ON [PRIMARY]
GO
insert into table1 (col1,col2,col11,col12,col13,col14) values
(1, 10.0 , 80.00, 10.000 , 12.00 , 90.00),
(2, 70.0 , 10.00 , 97.960 , 14.00 , 10.00),
(3, 30.00, 12.00 , 14.000 , 115.00 , 11.00),
(4, 40.00, 11.00 , 15.000 , 15.80 , 12.00)
declare @sql varchar(max)
declare @col varchar(max)=''
select @col=@col+ COLUMN_NAME +', ' FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'table1'
AND DATA_TYPE IN ('int','decimal','numeric')
SELECT ColumnName,ColumnValue
into #TableMax
from (select cast(max(col1) as numeric(7,3))C1, CAST(max(col2) as numeric(7,3))C2,
cast(max(col11) as numeric(7,3))C11, CAST(max(col12) as numeric(7,3))C12,
CAST(max(col13) as numeric(7,3))C13, CAST(Max(col14) as numeric(7,3))C14
from table1) T
Unpivot(ColumnValue For ColumnName IN (C1,C2,C11,C12,C13,C14)) AS H
SELECT ColumnName,ColumnValue
into #TableMin
from (select cast(Min(col1) as numeric(7,3))C1, CAST(Min(col2) as numeric(7,3))C2,
cast(Min(col11) as numeric(7,3))C11, CAST(Min(col12) as numeric(7,3))C12,
CAST(Min(col13) as numeric(7,3))C13, CAST(Min(col14) as numeric(7,3))C14
from table1) T
Unpivot(ColumnValue For ColumnName IN (C1,C2,C11,C12,C13,C14)) AS H
select top 1 columnname max_columnname,columnvalue max_columnvalue,len(columnvalue)max_col_value_length from #TableMax order by columnvalue desc
select top 1 columnname min_columnname,columnvalue min_columnvalue,len(columnvalue)min_col_value_length from #TableMin order by columnvalue
drop table table1
drop table #TableMax
drop table #TableMin
答案 1 :(得分：0)
检查一下：
DECLARE @TB TABLE(col1 int, col2 decimal(10,2), col11 decimal(10,3), col12 decimal(10,2),col13 decimal(10,2),col14 decimal(10,2))
insert into @tb
select 1 , 10.0 , 80.00 , 10.000 , 12.00 , 90.00 union all
select 2 , 70.0 , 10.00 , 97.960 , 14.00 , 10.00 union all
select 3 , 30.00 , 12.00 , 14.000 , 115.00 , 11.00 union all
select 4 , 40.00 , 11.00 , 15.000 , 15.80 , 12.00
select 'table1' as Table_Name,b.column_name as max_col_name, cast(a.max_col as decimal(10,2)) as max_col_value , len(cast(a.max_col as decimal(10,2))) as max_col_value_length from
(select max(max_col1) as max_col from
(select max(col1) as max_col1,'col1' as column_name from @tb union all
select max(col2) as max_col2,'col2' from @tb union all
select max(col11)as max_col11,'col11' from @tb union all
select max(col12)as max_col12,'col12' from @tb union all
select max(col13)as max_col13,'col13' from @tb union all
select max(col14)as max_col14,'col14' from @tb) as a) as a
left join
(select max(max_col1) as max_col,column_name from
(select max(col1) as max_col1,'col1' as column_name from @tb union all
select max(col2) as max_col2,'col2' from @tb union all
select max(col11)as max_col11,'col11' from @tb union all
select max(col12)as max_col12,'col12' from @tb union all
select max(col13)as max_col13,'col13' from @tb union all
select max(col14)as max_col14,'col14' from @tb) as a group by column_name) as b
on a.max_col = b.max_col
select 'table1' as Table_Name,b.column_name as min_col_name, cast(a.min_col as integer) as min_col_value , len(cast(a.min_col as integer)) min_col_value_length from
(select min(min_col1) as min_col from
(select min(col1) as min_col1,'col1' as column_name from @tb union all
select min(col2) as min_col2,'col2' from @tb union all
select min(col11)as min_col11,'col11' from @tb union all
select min(col12)as min_col12,'col12' from @tb union all
select min(col13)as min_col13,'col13' from @tb union all
select min(col14)as min_col14,'col14' from @tb) as a) as a
left join
(select min(min_col1) as min_col,column_name from
(select min(col1) as min_col1,'col1' as column_name from @tb union all
select min(col2) as min_col2,'col2' from @tb union all
select min(col11)as min_col11,'col11' from @tb union all
select min(col12)as min_col12,'col12' from @tb union all
select min(col13)as min_col13,'col13' from @tb union all
select min(col14)as min_col14,'col14' from @tb) as a group by column_name) as b
on a.min_col = b.min_col
结果为max：
table1 col13 115.00 6
结果为min：
table1 col1 1 1
答案 2 :(得分：-1)
我认为您可以通过两个步骤实现此目的，首先搜索每列的最大值或最小值然后将其取消（旋转表以使列成为行和行成为列）以查找总体最大值或最小值。
此查询将找到最大值
WITH cte1 AS (SELECT 'table1' AS Table_name
,max_col_name
,max_col_value
,LEN(max_col_value) AS max_col_value_length
FROM
(SELECT col2,col3,col4
FROM
(SELECT MAX(col2) AS col2
,MAX(col3) AS col3
,MAX(col4) AS col4 FROM table1) x) y
UNPIVOT
(Nilai FOR max_col_name IN (col2,col3,col4)) unpvt)
SELECT * FROM cte
WHERE max_col_value = (SELECT MAX(max_col_value) FROM cte)
要查找最小值，只需将最小值更改为最小值