performance significantly reduced when inner join table and views - sql-server

Question

I have three views in my sql server:
CREATE VIEW [dbo].[v_CompanyLabelCreate]
AS
SELECT
c.Id AS Id,
c.[Name] AS CompanyName,
CASE WHEN r.ApprovedPatentCreativeApplication > 2 OR r.ApprovedCopyRightBookApplication + r.ApprovedCopyRightSoftwareApplication > 4 OR NumberInProduction + NumberNotInProduction > 10 THEN N'创造型'
ELSE NULL END AS Label
FROM Company c INNER JOIN ResearchInfo r ON c.Id = r.CompanyID
WHERE c.Submitted = 1
CREATE VIEW [dbo].[v_CompanyLabelHighPotential]
AS
SELECT
c.Id AS Id,
c.[Name] AS CompanyName,
CASE WHEN si1.Income >= 1000000 AND si2.Income <> 0 AND ((si1.Income -si2.Income)/si2.Income) >= 1 THEN N'潜力型'
WHEN n1.TotalProfit >= 500000 AND n2.TotalProfit <> 0 AND ((n1.TotalProfit - n2.TotalProfit)/n2.TotalProfit) >= 1 THEN N'潜力型'
WHEN nfa1.AssetsTotal >= 5000000 AND nfa2.AssetsTotal <> 0 AND ((nfa1.AssetsTotal - nfa2.AssetsTotal)/nfa2.AssetsTotal) >= 1 THEN N'潜力型'
ELSE NULL END AS Label
FROM Company c INNER JOIN SaleIncome si1 ON c.Id = si1.CompanyID AND si1.YearQuarterID = 2
INNER JOIN SaleIncome si2 ON c.Id = si2.CompanyID AND si2.YearQuarterID = 1
INNER JOIN NetProfit n1 ON c.Id = n1.CompanyID AND n1.YearQuarterID = 2
INNER JOIN NetProfit n2 ON c.Id = n2.CompanyID AND n2.YearQuarterID = 1
INNER JOIN NonFloatingAsset nfa1 ON c.Id = nfa1.CompanyID AND nfa1.YearQuarterID = 2
INNER JOIN NonFloatingAsset nfa2 ON c.Id = nfa2.CompanyID AND nfa2.YearQuarterID = 1
WHERE c.Submitted = 1
CREATE VIEW [dbo].[v_CompanyLabelHighTotalPolicies]
AS
SELECT
c.Id AS Id,
c.[Name] AS CompanyName,
CASE WHEN p.NumberOfPolicies >= 4 AND cp.PolicyID IS NOT NULL THEN N'政策大户'
ELSE NULL END AS Label
FROM Company c LEFT JOIN (SELECT CompanyID, COUNT(*) AS NumberOfPolicies FROM CompanyPolicy GROUP BY CompanyID) p ON c.Id = p.CompanyID
LEFT JOIN (SELECT CompanyID, PolicyID FROM CompanyPolicy WHERE PolicyID = 7) cp ON c.Id = cp.CompanyID
WHERE c.Submitted = 1
When I run a select query which inner joins these three views:
select *
from v_CompanyLabelCreate clc
INNER JOIN v_CompanyLabelHighPotential clhp ON clc.Id = clhp.Id
INNER JOIN v_CompanyLabelHighTotalPolicies chtp ON clc.Id = chtp.Id
It is fast and smooth. However, when I try to run a select query which inner join these three views with some other tables:
select *
FROM Company c
INNER JOIN BasicInfo b ON c.Id = b.CompanyID
INNER JOIN CompanyDimension cd ON c.Id = cd.CompanyID
INNER JOIN TotalProfit t ON c.Id = t.CompanyID AND t.YearQuarterID = 2
INNER JOIN SaleCost sc ON c.Id = sc.CompanyID AND sc.YearQuarterID = 2
INNER JOIN CompanyFinancialIndex cfi ON c.Id = cfi.CompanyID AND cfi.YearQuarterID = 6
INNER JOIN SaleIncome si1 ON c.Id = si1.CompanyID AND si1.YearQuarterID = 2
INNER JOIN SaleIncome si2 ON c.Id = si2.CompanyID AND si2.YearQuarterID = 1
INNER JOIN NetProfit n1 ON c.Id = n1.CompanyID AND n1.YearQuarterID = 2
INNER JOIN NetProfit n2 ON c.Id = n2.CompanyID AND n2.YearQuarterID = 1
INNER JOIN v_CompanyLabelCreate clc ON c.Id = clc.Id
INNER JOIN v_CompanyLabelHighPotential clhp ON clc.Id = clhp.Id
INNER JOIN v_CompanyLabelHighTotalPolicies chtp ON clc.Id = chtp.Id
WHERE c.Submitted = 1
It looks like it will take forever to get the result (Download the execution plan here: the execution plan). Now, if I just run the query without inner joining the three views like this:
select *
FROM Company c
INNER JOIN BasicInfo b ON c.Id = b.CompanyID
INNER JOIN CompanyDimension cd ON c.Id = cd.CompanyID
INNER JOIN TotalProfit t ON c.Id = t.CompanyID AND t.YearQuarterID = 2
INNER JOIN SaleCost sc ON c.Id = sc.CompanyID AND sc.YearQuarterID = 2
INNER JOIN CompanyFinancialIndex cfi ON c.Id = cfi.CompanyID AND cfi.YearQuarterID = 6
INNER JOIN SaleIncome si1 ON c.Id = si1.CompanyID AND si1.YearQuarterID = 2
INNER JOIN SaleIncome si2 ON c.Id = si2.CompanyID AND si2.YearQuarterID = 1
INNER JOIN NetProfit n1 ON c.Id = n1.CompanyID AND n1.YearQuarterID = 2
INNER JOIN NetProfit n2 ON c.Id = n2.CompanyID AND n2.YearQuarterID = 1
WHERE c.Submitted = 1
It is fast and smooth again.
About the tables used:
Company: A table which stores company Ids and company names. Of course c.Id is the PK and it will be referred to as Company ID later.
ResearchInfo, BasicInfo, CompanyDimension, CompanyFinancialIndex: CompanyID is foreign key, every company only has at most one row in this table.
SaleIncome, SaleCost, NetProfit, NonFloatingAsset, TotalProfit: the combination of CompanyID and YearQuarterID work as Primary Key, although every table has an identity field which is defined as the PK.

Answer 1

You also can have a missed index issue, but your query is a bit complex. You can try to reduce the complexity using cte table like (You need the field names be unique in CTEs):
WITH cte_tb1
AS (SELECT * -- UNIQUE NAMES FIELDS IS REQUIRED
FROM company c
INNER JOIN basicinfo b
ON c.id = b.companyid
INNER JOIN companydimension cd
ON c.id = cd.companyid
INNER JOIN totalprofit t
ON c.id = t.companyid
AND t.yearquarterid = 2
INNER JOIN salecost sc
ON c.id = sc.companyid
AND sc.yearquarterid = 2
INNER JOIN companyfinancialindex cfi
ON c.id = cfi.companyid
AND cfi.yearquarterid = 6
INNER JOIN saleincome si1
ON c.id = si1.companyid
AND si1.yearquarterid = 2
INNER JOIN saleincome si2
ON c.id = si2.companyid
AND si2.yearquarterid = 1
INNER JOIN netprofit n1
ON c.id = n1.companyid
AND n1.yearquarterid = 2
INNER JOIN netprofit n2
ON c.id = n2.companyid
AND n2.yearquarterid = 1
WHERE c.submitted = 1),
cte_tb2
AS (SELECT * -- UNIQUE NAMES FIELDS IS REQUIRED
FROM v_companylabelcreate clc
INNER JOIN v_companylabelhighpotential clhp
ON clc.id = clhp.id
INNER JOIN v_companylabelhightotalpolicies chtp
ON clc.id = chtp.id)
SELECT *
FROM cte_tb1 a
INNER JOIN cte_tb2 b
ON a.id = b.id