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how to add a column in certain positon in table?

Posted on 2010-11-16
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Last Modified: 2012-08-14
Hi Expert,

How I can add a cloumn to a exist table in certain position for instance,

Table 1

FirstName varchar(20), Lastname varchar(20).

I want add a column MiddleName varchar(20) in second column and all data can not be lost.

Thanks in advance.
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Question by:dshi15
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DVation191 earned 100 total points
ID: 34145778
ALTER TABLE table_name ADD column_name column-definition [ FIRST | AFTER col_name ]

e.g.
Alter Table Stu_Table add Stu_Class int(10) AFTER Stu_Name

http://www.roseindia.net/sql/sql-add-column-position.shtml
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by:Guy Hengel [angelIII / a3]
Guy Hengel [angelIII / a3] earned 100 total points
ID: 34145782
in short: this is not possible unless you recreate the table.
of course, you can rename the table, create new table with proper design, and insert back the data.
when you use the SQL server GUI, you can do that in the design mode, and the GUI will build all the SQL for you.

now, the position of the column should not matter, at least not with serious development, because the database, in the end, should be nothing else than data storage and eventually (part of) the data layer.
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by:s_chilkury
s_chilkury earned 100 total points
ID: 34145798
Go to the design view of your table, then right click on
the position where you want the new table and select insert column.
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by:EvilPostIt
EvilPostIt earned 100 total points
ID: 34145903
As a side note, if you use the designer to change the ordinal position of the column. Behind the scenes it re-creates the table.

Best option is to follow what angelIII has suggested.
I think DVation191's comment applies to MySQL
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by:dshi15
ID: 34145986
I need use sql statement, not design view. Could some one write sql statement? How to recreate?

thanks,
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Expert Comment

by:EvilPostIt
ID: 34146008
You gonna need to post the table structure first.
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Assisted Solution

by:Racim BOUDJAKDJI
Racim BOUDJAKDJI earned 100 total points
ID: 34151001
Two things to take into consideration:

> There is no obligation to have the same column order in the table as you'd have in a display.
> Appart from amount of space used and under the assumption of relevant indexing, order of columns is totally irrelevant in a database.  You can create *ANY* order you need in a view.

This is one of the typical examples where the finality does not worth the effort of reordering the columns...

Hope this helps
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Expert Comment

by:EvilPostIt
ID: 34153193
I Agree.
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by:Anthony Perkins
ID: 34160730
>>Could some one write sql statement? How to recreate?<<
If you persist and in case you missed the point, here it goes again:
Use SSMS to make the change but do not save instead copy the script generated and use that in your code.
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