SQL Combine two statements from old tabels into a new one - sql

Question

I want to create a new table in a stored procedure. In the new table I need a row with a combined value from the old tables.
It should look like sees
Table_old1 Table_old2 Table_new
----------------------------------------
Edward Mary EdwardMary
Daniel John DanielJohn
George Sam GeorgeSam
Steven Alaina StevenAlaina
Paul Edward PaulEdward
For the stored procedure I use some parameters for dynamic SQL.
I tried the following code my result was no success at all ;(
CREATE PROCEDURE build_together
#tblname sysname
AS
DECLARE #sql nvarchar(4000)
SELECT #sql = ' CREATE TABLE all_together AS('
' SELECT all.Values, choosen.Values ' +
'INTO all_together'+
' FROM dbo.tbl_all_possible all, dbo.' + quotename(#tblname) + ' choosen);'
EXEC sp_executesql #sql
Any insight would be greatly appreciated.

Answer 1

I am guessing you want to generate some sample data. This should be useful and if you want to modify and add Joins, that should be easy as well.
SCRIPT:
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[usp_BuildTogether]') AND type in (N'P', N'PC'))
DROP PROCEDURE dbo.usp_BuildTogether
GO
CREATE PROCEDURE usp_BuildTogether
#OneTableName sysname = 'tbl_all_possible'
,#OneColumnName sysname = 'Value'
,#TwoTableName sysname = 'tbl_all_possible2'
,#TwoColumnName sysname = 'Value'
,#CombinedTableName sysname = 'all_together'
AS
BEGIN
DECLARE #sql nvarchar(4000) = NULL
SELECT #sql = 'IF object_id(N'''+#CombinedTableName+''')>0'+CHAR(13)+CHAR(10)+
'BEGIN'+CHAR(13)+CHAR(10)+
' Drop table '+#CombinedTableName+CHAR(13)+CHAR(10)+
'END'+CHAR(13)+CHAR(10)
EXEC (#sql)
SELECT #sql = 'SELECT one.'+#OneColumnName+' AS Table_old1, two.'+#TwoColumnName+' as Table_old2, one.'+#OneColumnName+'+'' ''+two.'+#TwoColumnName+' as Table_new'+CHAR(13)+CHAR(10)+
'INTO '+#CombinedTableName+CHAR(13)+CHAR(10)+
'FROM '+QUOTENAME(#OneTableName)+' one, '+QUOTENAME(#TwoTableName)+' two;'
EXEC (#sql)
END
TEST DATA:
--Cleanup Old test tables
IF object_id(N'all_together')>0
BEGIN
Drop table all_together
END
IF object_id(N'tbl_all_possible')>0
BEGIN
Drop table tbl_all_possible
END
Create Table tbl_all_possible (ID INT IDENTITY(1,1) ,Value varchar(250))
IF object_id(N'tbl_all_possible2')>0
BEGIN
Drop table tbl_all_possible2
END
Create Table tbl_all_possible2 (ID INT IDENTITY(1,1) ,Value varchar(250))
-- Insert Test Data
INSERT INTO tbl_all_possible
SELECT 'Edward' UNION ALL
SELECT 'Daniel' UNION ALL
SELECT 'George' UNION ALL
SELECT 'Steven' UNION ALL
SELECT 'Paul'
INSERT INTO tbl_all_possible2
SELECT 'Mary' UNION ALL
SELECT 'John' UNION ALL
SELECT 'Sam' UNION ALL
SELECT 'Alaina' UNION ALL
SELECT 'Edward'
--Execute SP
EXEC SP_EXECUTESQL usp_BuildTogether
--Verify Result
SELECT * from all_together
--Cleanup
IF object_id(N'tbl_all_possible')>0
BEGIN
Drop table tbl_all_possible
END
IF object_id(N'tbl_all_possible2')>0
BEGIN
Drop table tbl_all_possible2
END
IF object_id(N'all_together')>0
BEGIN
Drop table all_together
END

Answer 2

Just try this out,may not be correct as you didn't mention any key columns, just gave it a spin.
SELECT old1.name as oldname1,old2.name as oldname2,old1.name+old2.name as newname AS name
(SELECT name,row_number() OVER (ORDER BY (SELECT NULL)) AS id FROM old_table1 )old1
JOIN
(SELECT name,row_number() OVER (ORDER BY (SELECT NULL)) AS id FROM old_table2 )old2
ON old1.id=old2.id

Answer 3

You can use simple JOIN and CONCATENATE to achieve this.
Try the following:
CREATE PROCEDURE build_together
AS
CREATE TABLE Table_New
--Insert column names here
INSERT INTO Table_New
SELECT old1.ColumnName + old2.ColumnName AS New_ColumnName
FROM Table_old1 old1, Table_old2 old2
--If you have any where condition or specific Primary key that you need to match,
--then add a where clause:
WHERE old1.Primary_Key = old2.Primary_Key