Loop through 2 tables/table variables and form insert statement.

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SQL-Server-2008R2

Hi,

I have 2 tables variables as seen below :

@a

[Deptname]
[Location]
[Column1]
[Column2]
[Column3]

@b

testval1,
testval2,
30,
50,
60

The first one i.e. @a has all the column names & the second i.e. @b has all the field values.
Need to loop through these 2 table variables & form an insert statement to insert the columns & corresponding values in a third table.
i.e.

SQL

insert into my_table ([Deptname],[Location],[Column1],[Column2],[Column3])
values ('testval1','testval2','30','50','60')

Any help would be much appreciated.

What I have tried:

SQL

declare @a  varchar(100)  
  
set @a = '[Deptname],[Location],[Column1],[Column2],[Column3]'   
  
select   
    a.value('.', 'varchar(max)')   
from  
    (select cast('<m>' + REPLACE(@a, ',', '<m>') + '' AS XML) as col) as A  
    CROSS APPLY A.col.nodes ('/M') AS Split(a)  



declare @b  varchar(100)  
  
set @b = 'testval1','testval2','30','50','60'   
  
select   
    b.value('.', 'varchar(max)')   
from  
    (select cast('<m>' + REPLACE(@b, ',', '<m>') + '' AS XML) as col) as B  
    CROSS APPLY B.col.nodes ('/M') AS Split(B)

Posted 11-Feb-21 9:50am

aakar

Updated 11-Feb-21 22:43pm

Maciej Los

v2

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Comments

Maciej Los 12-Feb-21 3:19am

In your case @a and @b aren't table variables! They store data of varchar data type (as they were declared).

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Maciej Los · Answer 1 · 2021-02-11T22:43:00

First of all, your sql statement is wrong.

Second of all, you can create sql statement this way:

SQL

declare @a  varchar(1000)  
declare @b  varchar(1000)  
declare @qry varchar(4000)
  
set @a = '[Deptname],[Location],[Column1],[Column2],[Column3]'   
set @b = '''testval1'',''testval2'',''30'',''50'',''60''' 
set @qry = 'INSERT INTO my_table (' + @a + ')' + 
    ' VALUES(' + @b + ');'

print @qry;
-- to execute command, uncomment below line
--execute(@qry);

db<>fiddle[^]
But(!) this way of inserting data is NOT recommended!

Second of all, i'd avoid of using such of statements. I'd suggest to use stored procedures[^], which can accept parameters.