How to suppress displaying specific columns on dynamic tables - sql-server

Question

I have two dynamic tables that I am left joining. I want to suppress displaying specific column from both tables. So far, this is my query:
SELECT a.*
,b.*
FROM APEXCOUNTYREVIEW_REPORT a
LEFT JOIN TBL_LOW_VOLUME_test b
ON a.fips_data_type = b.fips_datatype
Both of these are dynamic tables with plenty of columns. I want to suppress columns in the middle of the tables.
For example, Table1 has columns C1, C2, C3, C4, C5, C6, C7,...etc. I do not want to pull columns C3, C4 and C5, but want to display C1, C2, C6, C7 and so forth. Since both of these are dynamic tables, the number of columns is not known until execution of the query. I'm using SSMS 2008 R2.
Is there a way to do this with SQL query?
Here's the query to build table2, tbl_low_voulume_test:
I'm also trying to add a text to the column name on table2, since they are the same as the column names on table1, that is being created dynamically and I'm getting all kinds of invalid error messages. How can I add the text "Flag" on the dynamic column names?
The query below runs fine.
DECLARE #T AS TABLE(Y INT NOT NULL PRIMARY KEY);
DECLARE
#COLS AS NVARCHAR(MAX),
#COLNAMES AS NVARCHAR(MAX),
#Y AS INT,
#SQL AS NVARCHAR(MAX);
SET #COLS = STUFF(
(SELECT N',' + QUOTENAME(Y)
FROM (SELECT DISTINCT RECMONTH AS Y FROM REPORTING.dbo.TBL_LOW_VOLUME A
WHERE (RECMONTH>= '2005-01')
AND RECMONTH <= CONVERT(VARCHAR(7), getdate(), 120)
) AS Y
ORDER BY Y
FOR XML PATH('')),
1, 1, N'');
SET #COLNAMES = STUFF(
(SELECT N',ISNULL(' + QUOTENAME(Y)+',0) AS '+ QUOTENAME(Y)
FROM (SELECT DISTINCT RECMONTH AS [Y] FROM REPORTING.dbo.TBL_LOW_VOLUME A
WHERE (RECMONTH>= '2005-01')
AND RECMONTH <= CONVERT(VARCHAR(7), getdate(), 120)
) AS Y
ORDER BY Y
FOR XML PATH('')),
1, 1, N'');
IF OBJECT_ID('TBL_LOW_VOLUME_test') IS NOT NULL
BEGIN DROP TABLE reporting.dbo.TBL_LOW_VOLUME_test END
SET #SQL = N'SELECT * INTO dbo.TBL_LOW_VOLUME_test
FROM (
SELECT CONVERT(DATE, GETDATE()) AS RUN_DATE, FIPS+DATATYPE AS FIPS_DATATYPE,
FIPS,DATATYPE,' +#COLNAMES + '
FROM (SELECT A.[FIPS], A.DATATYPE
,RECMONTH
,[LV_FLAG]
FROM dbo.TBL_LOW_VOLUME A
where FIPS is not NULL and isnumeric(FIPS) = 1 and len(ltrim(FIPS)) = 5
and FIPS not in (''-0000'',''00000'',''-0001'')
and FIPS <= ''56999''
) AS D
PIVOT(SUM([LV_FLAG]) FOR RECMONTH IN(' + #COLS + N')) AS P) AS Z';
EXEC SP_EXECUTESQL #SQL;
Here's a picture of my two tables.
Table1:
col1, col2, col3, col4, col5, col6, etc...
columns 1 thru 5 are static, starting on column c0l6, it becomes dynamic where every beginning of the month it adds a new month.
Table2:
cola, colb, colc, cold, cole, colf, etc...
columns a and b are both static, the rest are dynamic where every beginning of the month it adds a new month.
This should be the final results I want to display.
col1, col2, col6, etc...(all the dynamic columns on table1), cola, colc, cole, etc...(all the dynamic columns on table2)
So I want to pick and choose which columns I need from each table.
Here's the query after I did print #sql:
For this table, I do not want to display Run_Date and FIPS_DATATYPE, just all the date columns.
SELECT * INTO dbo.TBL_LOW_VOLUME_test
FROM (
SELECT CONVERT(DATE, GETDATE()) AS RUN_DATE, FIPS+DATATYPE AS FIPS_DATATYPE,
ISNULL([2005-01],0) AS [2005-01],ISNULL([2005-02],0) AS [2005-02],ISNULL([2005-03],0) AS [2005-03],ISNULL([2005-04],0) AS [2005-04],
ISNULL([2005-05],0) AS [2005-05],ISNULL([2005-06],0) AS [2005-06],ISNULL([2005-07],0) AS [2005-07],ISNULL([2005-08],0) AS [2005-08],
ISNULL([2005-09],0) AS [2005-09],ISNULL([2005-10],0) AS [2005-10],ISNULL([2005-11],0) AS [2005-11],ISNULL([2005-12],0) AS [2005-12],
ISNULL([2006-01],0) AS [2006-01],ISNULL([2006-02],0) AS [2006-02],ISNULL([2006-03],0) AS [2006-03],ISNULL([2006-04],0) AS [2006-04],
ISNULL([2006-05],0) AS [2006-05],ISNULL([2006-06],0) AS [2006-06],ISNULL([2006-07],0) AS [2006-07],ISNULL([2006-08],0) AS [2006-08],
ISNULL([2006-09],0) AS [2006-09],ISNULL([2006-10],0) AS [2006-10],ISNULL([2006-11],0) AS [2006-11],ISNULL([2006-12],0) AS [2006-12],
ISNULL([2007-01],0) AS [2007-01],ISNULL([2007-02],0) AS [2007-02],ISNULL([2007-03],0) AS [2007-03],ISNULL([2007-04],0) AS [2007-04],
ISNULL([2007-05],0) AS [2007-05],ISNULL([2007-06],0) AS [2007-06],ISNULL([2007-07],0) AS [2007-07],ISNULL([2007-08],0) AS [2007-08],
ISNULL([2007-09],0) AS [2007-09],ISNULL([2007-10],0) AS [2007-10],ISNULL([2007-11],0) AS [2007-11],ISNULL([2007-12],0) AS [2007-12],
ISNULL([2008-01],0) AS [2008-01],ISNULL([2008-02],0) AS [2008-02],ISNULL([2008-03],0) AS [2008-03],ISNULL([2008-04],0) AS [2008-04],
ISNULL([2008-05],0) AS [2008-05],ISNULL([2008-06],0) AS [2008-06],ISNULL([2008-07],0) AS [2008-07],ISNULL([2008-08],0) AS [2008-08],
ISNULL([2008-09],0) AS [2008-09],ISNULL([2008-10],0) AS [2008-10],ISNULL([2008-11],0) AS [2008-11],ISNULL([2008-12],0) AS [2008-12],
ISNULL([2009-01],0) AS [2009-01],ISNULL([2009-02],0) AS [2009-02],ISNULL([2009-03],0) AS [2009-03],ISNULL([2009-04],0) AS [2009-04],
ISNULL([2009-05],0) AS [2009-05],ISNULL([2009-06],0) AS [2009-06],ISNULL([2009-07],0) AS [2009-07],ISNULL([2009-08],0) AS [2009-08],
ISNULL([2009-09],0) AS [2009-09],ISNULL([2009-10],0) AS [2009-10],ISNULL([2009-11],0) AS [2009-11],ISNULL([2009-12],0) AS [2009-12],
ISNULL([2010-01],0) AS [2010-01],ISNULL([2010-02],0) AS [2010-02],ISNULL([2010-03],0) AS [2010-03],ISNULL([2010-04],0) AS [2010-04],
ISNULL([2010-05],0) AS [2010-05],ISNULL([2010-06],0) AS [2010-06],ISNULL([2010-07],0) AS [2010-07],ISNULL([2010-08],0) AS [2010-08],
ISNULL([2010-09],0) AS [2010-09],ISNULL([2010-10],0) AS [2010-10],ISNULL([2010-11],0) AS [2010-11],ISNULL([2010-12],0) AS [2010-12],
ISNULL([2011-01],0) AS [2011-01],ISNULL([2011-02],0) AS [2011-02],ISNULL([2011-03],0) AS [2011-03],ISNULL([2011-04],0) AS [2011-04],
ISNULL([2011-05],0) AS [2011-05],ISNULL([2011-06],0) AS [2011-06],ISNULL([2011-07],0) AS [2011-07],ISNULL([2011-08],0) AS [2011-08],
ISNULL([2011-09],0) AS [2011-09],ISNULL([2011-10],0) AS [2011-10],ISNULL([2011-11],0) AS [2011-11],ISNULL([2011-12],0) AS [2011-12],
ISNULL([2012-01],0) AS [2012-01],ISNULL([2012-02],0) AS [2012-02],ISNULL([2012-03],0) AS [2012-03],ISNULL([2012-04],0) AS [2012-04],
ISNULL([2012-05],0) AS [2012-05],ISNULL([2012-06],0) AS [2012-06],ISNULL([2012-07],0) AS [2012-07],ISNULL([2012-08],0) AS [2012-08],
ISNULL([2012-09],0) AS [2012-09],ISNULL([2012-10],0) AS [2012-10],ISNULL([2012-11],0) AS [2012-11],ISNULL([2012-12],0) AS [2012-12],
ISNULL([2013-01],0) AS [2013-01],ISNULL([2013-02],0) AS [2013-02],ISNULL([2013-03],0) AS [2013-03],ISNULL([2013-04],0) AS [2013-04],
ISNULL([2013-05],0) AS [2013-05],ISNULL([2013-06],0) AS [2013-06],ISNULL([2013-07],0) AS [2013-07],ISNULL([2013-08],0) AS [2013-08],
ISNULL([2013-09],0) AS [2013-09],ISNULL([2013-10],0) AS [2013-10],ISNULL([2013-11],0) AS [2013-11],ISNULL([2013-12],0) AS [2013-12],
ISNULL([2014-01],0) AS [2014-01],ISNULL([2014-02],0) AS [2014-02],ISNULL([2014-03],0) AS [2014-03],ISNULL([2014-04],0) AS [2014-04],
ISNULL([2014-05],0) AS [2014-05],ISNULL([2014-06],0) AS [2014-06],ISNULL([2014-07],0) AS [2014-07],ISNULL([2014-08],0) AS [2014-08],
ISNULL([2014-09],0) AS [2014-09],ISNULL([2014-10],0) AS [2014-10],ISNULL([2014-11],0) AS [2014-11],ISNULL([2014-12],0) AS [2014-12],
ISNULL([2015-01],0) AS [2015-01],ISNULL([2015-02],0) AS [2015-02]

Answer 1

How can I add the text "Flag" on the dynamic column names?
Looks to me like you want to replace
QUOTENAME(Y)
with
QUOTENAME(Y+'Flag')
Everywhere it occurs in both the SET #COLS and SET #COLNAMES statements.
EDIT: To filter out columns, looking at your final select, you're doing SELECT * FROM (a derived table that specifies static columns + COLNAMES).
So to filter out columns, filter them out of the derived table. They have to be either the static columns RUN_DATE, FIPS_DATATYPE, FIPS, DATATYPE, or one of the columns in COLNAMES, which you can filter out with a REPLACE function.
Or if I am not understanding the problem, please post sample output of your current query and which rows you want to filter out.
2ND EDIT: To take Run_Date and FIPS_DATATYPE out of your results, simply take them out of the middle-level select:
SET #SQL = N'SELECT * INTO dbo.TBL_LOW_VOLUME_test
FROM (
SELECT ' +#COLNAMES + '
FROM ...