Check if table has a companyID column - sql

Question

Using SQl how would I check a column of all the tables in #DestinationDatabase if they have a CompanyID using an if statement? within the while loop of the code below?.
I have been told cursors have performance issues but this is the route that somebody above me has chosen to take.
DECLARE #firstLoop BIT
SET #firstLoop = true
DECLARE #Counter INT -- counting variable
----------- Cursor specific code starts here ------------
-- company cursor
declare copyCompanyDataCursor CURSOR fast_forward FOR
SELECT ID from #CompanyIDs;
open copyCompanyDataCursor
fetch next from copyCompanyDataCursor into #Company_Id;
WHILE ##FETCH_STATUS = 0
BEGIN
declare #processorder int;
declare #tablename varchar(500);
-- table cursor
declare copyTableDataCursor CURSOR fast_forward FOR
SELECT processorder,tablename from #TableList4 order by processorder;
open copyTableDataCursor
fetch next from copyTableDataCursor into #processorder, #tablename;
while ##FETCH_STATUS = 0
BEGIN
SET IDENTITY_INSERT [c365online_script1.dbo.tCompany] OFF
-- Does the table have a companyID column? if statement checking for company id
-- if yes then copy data based on companyID in cursor
ELSE
IF #firstLoop > =1 THEN
-- if no check if this is the first time through company loop and copy all data
-- if #firstloop company exists look at information schema
-- insert into c365online_script1.dbo.tCompany(selec
EXEC('INSERT ' + #Destination_Database_Name + '.dbo.' + #tablename + ' SELECT * FROM ' + #Source_Database_Name + '.dbo.' + #tablename + ')')
-- company logic
SET IDENTITY_INSERT [c365online_script1.dbo.tCompany] ON
FETCH NEXT FROM copyTableDataCursor into #processorder,#tablename;
END
close copyTableDataCursor;
Deallocate copyTableDataCursor;
--INSERT INTO c365online_script1.dbo.tCompany
--SELECT *
--FROM production2.tCompany
--WHERE ISNULL(CompanyID, 0) = 0 -- copy all data where id is equal to zero
--#Destination_Database_Name
--
--EXEC(INSERT + #Destination_Database_Name + '.dbo.' + #tablename + ' SELECT * FROM ' + #Source_Database_Name + '.dbo.' + #tablename + ' WHERE ' + #Source_Database_Name + '.dbo.' + #tablename + '.CompanyID = ' + #Company_Id + ')'
SET #firstLoop = false;
FETCH NEXT FROM copyCompanyDataCursor into #Company_Id;
END
CLOSE copyCompanyDataCursor;
DEALLOCATE copyCompanyDataCursor;

Answer 1

You can add this in your WHILE loop. I think this is the solution you're looking for.
IF (
SELECT 1
FROM sys.tables st
INNER JOIN sys.columns sc
ON st.object_id = sc.object_id
WHERE st.NAME = #tablename
AND sc.NAME = #company_id
) > 0
BEGIN
-- your logic here --
END
ELSE
-- other logic here --