보미네

if object_id ('temp') is not null
drop table temp 
go

create table temp
(id varchar(20)
, time time 
, product varchar(100)
) 
go

insert into temp (id, time, product)
select id, time, product 
from 
	( 
	  values 
	  ('A', '08:10', 'pizza' )
	, ('A', '09:55', 'noodle' )
	, ('B', '12:30', 'pizza' )
	) a (id, time, product)
go

-- Consider the pros and cons of both queries.
-- 1 
; with a
as 
(
select row_number() over (partition by id order by time asc) rn , * 
from temp 
)
select *
from a 
where rn = 1 

-- 2
select b.*
from 
	(
	select distinct id 
	from temp a
	) a
	cross apply 
	(
	select top 1 * 
	from temp 
	where id = a.id
	order by time 
	) b

if object_id ( 'tblx') is not null 
drop table tblx 
go
 
select 
	c1, c2, c3, isnull(sign(c3-lag(c3, 1) over (partition by c1 order by (c2))),0) c4 
into tblx 
from 
	(
	select char(a.idx % 26 + 65) c1
		, cast ('20180101' as datetime) + b.idx c2
		, cast(abs(checksum(newid())) % 100000 as int) c3
	from 
		(
		select top 26 cast(row_number() over (order by (select 1)) as int) -1 idx
		from sys.objects a1
		) a, 
		(
		select top 365 cast(row_number() over (order by (select 1)) as int) -1 idx
		from sys.objects a1
			, sys.objects a2
		) b 
	) a 
where 
   datepart(weekday, c2 ) not in (1,7)

--
select * from tblx 

-- 1 
; with a as
(
select row_number() over ( partition by c1, c order by c2) rn 
	, * 
from tblx 
	, 
	(
	select 0 c union all 
	select 1 union all 
	select 2 union all
	select 3 union all
	select 4 union all
	select 5
	) b
) 
select 
	  max(c1) c1, min(c2) c2
	, max(case when c = 0 then c3 else null end ) d0
	, max(case when c = 1 then c3 else null end ) d1
	, max(case when c = 2 then c3 else null end ) d2 
	, max(case when c = 3 then c3 else null end ) d3
	, max(case when c = 4 then c3 else null end ) d4 
	, max(case when c = 5 then c3 else null end ) d5 
from a 
group by c1, rn-c
having max(case when c = 0 then c3 else null end ) is not null
	and sign (max(case when c = 1 then c3 else null end ) - max(case when c = 0 then c3 else null end )) 
	  + sign (max(case when c = 2 then c3 else null end ) - max(case when c = 1 then c3 else null end )) 
	  + sign (max(case when c = 3 then c3 else null end ) - max(case when c = 2 then c3 else null end )) 
	  + sign (max(case when c = 4 then c3 else null end ) - max(case when c = 3 then c3 else null end )) 
	  + sign (max(case when c = 5 then c3 else null end ) - max(case when c = 4 then c3 else null end )) 
	  = 5
order by c1, c2 

-- 2 
; with a 
as
(
select *
	, lag(c3, 1) over (partition by c1 order by (c2)) dm1
	, lag(c3, 2) over (partition by c1 order by (c2)) dm2
	, lag(c3, 3) over (partition by c1 order by (c2)) dm3
	, lag(c3, 4) over (partition by c1 order by (c2)) dm4
	, lag(c3, 5) over (partition by c1 order by (c2)) dm5
from tblx
)
select * 
from a 
where 
	sign(dm4-dm5)
	+ sign(dm3-dm4)
	+ sign(dm2-dm3)
	+ sign(dm1-dm2)
	+ sign(c3-dm1)  = 5

-- 3 
select a.c1, a.c2, a.c3
from 
	(
	select a.* , count(*) over (partition by c1, rn2) as cn
	from 
		(
			select a.*
				, row_number() over (partition by c1 order by c2) 
				  - row_number() over (partition by c1, c4 order by c2) as rn2
			from tblx a
		) a
	where c4 = 1
	) a
where cn >= 5 
order by c1, c2

function SqlQuery 
{
    param (
        [parameter(Mandatory=$true)]  [string] $server, 
        [parameter(Mandatory=$true)]  [string] $port,
        [parameter(Mandatory=$true)]  [string] $database, 
        [parameter(Mandatory=$true)]  [string] $id, 
        [parameter(Mandatory=$true)]  [string] $pass, 
        [parameter(Mandatory=$true)]  [string] $query,
        [parameter(Mandatory=$false)] [switch] $isRead = $false , 
        [parameter(Mandatory=$false)] [int]    $queryTimeout = 0 ,
        [parameter(Mandatory=$false)] [int]    $connTimeout = 5 ,

        [parameter(Mandatory=$false)] [string] $appName = "PowerShell"  
    ) 
    try
    {
        $substringLen = 30
        if ($query.Length -lt $substringLen)
        {
            $substringLen = $query.Length
        }
        $querySubstring = $query.substring(0, $substringLen)
        
        $conn = New-Object System.Data.SQLClient.SQLConnection
        $conn.ConnectionString = "server=$($server),$($port);database=$($database);User Id=$($id);Password=$($pass);Connect Timeout=$($connTimeout);Application Name=$($appName)"
        $conn.Open()
        $cmd = New-Object System.Data.SQLClient.SQLCommand
        $cmd.Connection = $conn
        $cmd.CommandText = $query
        $cmd.CommandTimeout=$queryTimeout
        if($isRead)
        {
            $ds=New-Object system.Data.DataSet
            $da=New-Object system.Data.SqlClient.SqlDataAdapter($cmd)
            $da.fill($ds) | Out-Null
            Write-Host ($ds.Tables | Format-Table | Out-String)
        }
        else
        {
            $cmd.ExecuteNonQuery() | Out-Null
        }
        $conn.Close()

        Write-Host "SUCCESS, SERVER : $($server), QUERY : $($querySubstring) ..."
    }
    catch 
    {
        Write-Host "FAILED, SERVER : $($server), QUERY : $($querySubstring) ..."
        throw "FAILED SERVER : $($server), ERROR MESSAGE : $($_)"
    }
}



[string] $port = "1433"
[string] $id = "id"
[string] $pass = "pass"
[string] $query = 
@"
select @@version
"@

SqlQuery -server "ip" -port "1433" -database "master" -id  $id -pass $pass -query $query -isRead:$true