sql server - Lost my column headings SQL -


i had following dummy code (you can use test):

use tempdb; go  create table dbo.products (   productid varchar (50),   period    varchar (6),   value     decimal (15, 2) ); insert dbo.products values ('north', '201201', 100), ('south', '201202', 500);  select productid, period, value dbo.products p;  declare @columns nvarchar(max), @sql nvarchar(max); set @columns = n''; select @columns += n', p.' + quotename(period)   (select p.period dbo.products p   group p.period) x; set @sql = n' select *  (   select productid, period, value    dbo.products p ) j pivot (   sum(value) period in ('   + stuff(replace(@columns, ', p.[', ',['), 1, 1, '')   + ') ) p;';  print @sql; exec sp_executesql @sql;  drop table dbo.products

it generated output contained nulls - column headings present though.

to remove nulls, code looks this:

use tempdb; go  create table dbo.products (   productid varchar (50),   period    varchar (6),   value     decimal (15, 2) ); insert dbo.products values ('north', '201201', 100), ('south', '201202', 500);  select productid, period, value dbo.products p;  declare @columns nvarchar(max), @selectlist nvarchar(max), @sql nvarchar(max); set @columns = n''; select @columns += n', p.' + quotename(period)   (select p.period dbo.products p   group p.period) x;  set @selectlist = n''; select @selectlist += n', isnull(' + quotename(period) + ', 0)'    (select p.period dbo.products p   group p.period) x; print '@selectlist = ' + @selectlist set @selectlist = stuff(@selectlist, 1, 1, '');  set @sql = n' select productid, ' + @selectlist + '    (   select productid, period, value    dbo.products p ) j pivot (   sum(value) period in ('   + stuff(replace(@columns, ', p.[', ',['), 1, 1, '')   + ') ) p;';  print '@sql = ' + @sql; exec sp_executesql @sql;

but column headings show [no column name]?

how headings back?

good afternoon! when setting @selectlist variable sure specify alias column names "as" ...

set @selectlist = n''; select @selectlist += n', isnull(' + quotename(period) + ', 0) ' + quotename(period)   (select p.period dbo.products p   group p.period) x; print '@selectlist = ' + @selectlist set @selectlist = stuff(@selectlist, 1, 1, '');

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