Complex SQL request with double join - sql

Question

There is two tables, first one contains variable name and its ID
VARIABLE NAME GUID
1000131 AddIn_EM63Alarms_Alarm_ShotCycle
1000132 AddIn_EM63Alarms_Alarm_Status
1000133 AddIn_EM63Alarms_Alarm_Code
1000134 AddIn_EM63Alarms_Alarm_Message
Second one contains variable ID and data of those variables in one column called "STRVALUE"
VARIABLE CALCULATION TIMESTAMP_S TIMESTAMP_MS VALUE STATUS GUID STRVALUE
1000131 0 1646404026 664 33 1078067200 1209
1000132 0 1646404026 664 122 1078067200 1
1000133 0 1646404026 664 48 1078067200 650
1000134 0 1646404026 664 61 1078067200 HOPPER TEMP.: TOL. LIM. +/-
1000131 0 1646404026 886 131 1078067200 1209
1000132 0 1646404026 886 220 1078067200 1
1000133 0 1646404026 886 146 1078067200 650
1000134 0 1646404026 886 159 1078067200 HOPPER TEMP.: TOL. LIM. +/-
1000131 0 1646404027 146 229 1078067200 1209
1000132 0 1646404027 146 318 1078067200 0
1000133 0 1646404027 146 244 1078067200 650
1000134 0 1646404027 146 257 1078067200 HOPPER TEMP.: TOL. LIM. +/-
1000131 0 1646404027 360 327 1078067200 1209
1000132 0 1646404027 360 416 1078067200 0
1000133 0 1646404027 360 342 1078067200 650
1000134 0 1646404027 360 355 1078067200 HOPPER TEMP.: TOL. LIM. +/-
1000131 0 1646404027 607 425 1078067200 1209
1000132 0 1646404027 607 514 1078067200 1
1000133 0 1646404027 607 440 1078067200 650
1000134 0 1646404027 607 453 1078067200 HOPPER TEMP.: TOL. LIM. +/-
1000131 0 1646404027 777 523 1078067200 1209
1000132 0 1646404027 777 612 1078067200 1
1000133 0 1646404027 777 538 1078067200 650
1000134 0 1646404027 777 551 1078067200 HOPPER TEMP.: TOL. LIM. +/-
1000131 0 1646404028 190 621 1078067200 1512
1000132 0 1646404028 190 698 1078067200 1
1000133 0 1646404028 190 636 1078067200 306
1000134 0 1646404028 190 649 1078067200 REQUEST: INSPECTION 2
I would like write SQL query which should output those four variable data in separate column like that:
timestamp_s | timestamp_ms | strvalue of 1st variable | strvalue of 2nd variable | strvalue of 3rd variable | strvalue of 4th variable
There is what i try:
select
a.timestamp_ ,
a.strvalue as ShotCycle,
b.strvalue as Code
from
(
select
a.timestamp_s,
v.name ,
a.strvalue
from
IMM0190_VARIABLES as v
inner join
IMM0190_AL as a
on
a.variable=v.variable
where
v.nAME = 'AddIn_EM63Alarms_Alarm_ShotCycle' ) as a
left join
(
select
a.timestamp_s,
v.name ,
a.strvalue
from
IMM0190_VARIABLES as v
inner join
IMM0190_AL as a
on
a.variable=v.variable
where
v.nAME = 'AddIn_EM63Alarms_Alarm_Code' ) as b
on
a.timestamp_s=b.timestamp_s
Therefore result is not as expected.
We can observe that rows are duplicated
Timestamp_s ShotCycle Code
1646404026 1209 650
1646404026 1209 650
1646404026 1209 650
1646404026 1209 650
Please suggest solution how to achieve required result.

Answer 1

This is how I resolved it.
SELECT
Main.Time,
Main.Shot,
Main.Status,
Main.Code,
Main.Message
from
(SELECT
dateadd(S, b.TIMESTAMP_S, '1970-01-01') as Time,
b.STRVALUE as Shot,
c.STRVALUE as Status,
d.STRVALUE as Code,
e.STRVALUE as Message
FROM
(
select al.[VARIABLE]
,al.[TIMESTAMP_S]
,al.[TIMESTAMP_MS]
,al.[STRVALUE]
from [IMM0190_T].[dbo].[IMM0190_AL] as al
where (al.variable = 1000131)
) as b
left join
(
select al.[VARIABLE]
,al.[TIMESTAMP_S]
,al.[TIMESTAMP_MS]
,al.[STRVALUE]
from [IMM0190_T].[dbo].[IMM0190_AL] as al
where (al.variable = 1000132)
)as c on b.timestamp_s=c.timestamp_s and b.TIMESTAMP_MS=c.TIMESTAMP_MS
left join
(
select al.[VARIABLE]
,al.[TIMESTAMP_S]
,al.[TIMESTAMP_MS]
,al.[STRVALUE]
from [IMM0190_T].[dbo].[IMM0190_AL] as al
where (al.variable = 1000133)
)as d on b.timestamp_s=d.timestamp_s and b.TIMESTAMP_MS=d.TIMESTAMP_MS
left join
(
select al.[VARIABLE]
,al.[TIMESTAMP_S]
,al.[TIMESTAMP_MS]
,al.[STRVALUE]
from [IMM0190_T].[dbo].[IMM0190_AL] as al
where (al.variable = 1000134)
)as e on b.timestamp_s=e.timestamp_s and b.TIMESTAMP_MS=e.TIMESTAMP_MS
) Main