Adding column between two other columns in SQL server

问题

Can you add a column to a table inserting it in between two existing columns in SQL Server without dropping and re-creating the table?

回答1:

The simple answer is no. Is there a reason why column order is important to you?

回答2:

Mediumly long answer, yes (ish) but it's ugly and you probably wouldn't want to do it.

please note: this code creates a physical table

CREATE TABLE MyTest (a int, b int, d int, e int)

INSERT INTO MyTest (a,b,d,e) VALUES(1,2,4,5)

SELECT * FROM MyTest

ALTER TABLE MyTest ADD c int
ALTER TABLE MyTest ADD d_new int
ALTER TABLE MyTest ADD e_new int

UPDATE MyTest SET d_new = d, e_new = e

ALTER TABLE MyTest DROP COLUMN d
ALTER TABLE MyTest DROP COLUMN e

EXEC SP_RENAME 'MyTest.d_new', 'd';
EXEC SP_RENAME 'MyTest.e_new', 'e';

SELECT * FROM MyTest 

DROP TABLE MyTest

回答3:

Take a look at this link:

http://www.bobsgear.com/display/ts/Adding+Column+After+Another+Column+-+SQL+Server+2005

As you can see, the answer is:

'not possible without moving data to a temp table'

which is what the SQL Server Management Studio actually does.

回答4:

Yes you can add here is the query for your concern:

ALTER table table_name ADD column column_name(new) datatype AFTER column_name

回答5:

First answer, no.

Second answer, according to this thread http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=58912, found via Can I logically reorder columns in a table?, you could create the column then reorder the columns in the table by editing the system tables. But it looks incredibly messy and I would not trust that things would not break.

回答6:

yes. You can drag and drop it in design mode, or copy and paste it in edit table mode

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in response to comments, yes, this is with SQL Server Management Studio through the UI, and under the hood, it's doing the drop/recreate you're trying to avoid, so no, you can't do it without the server doing it for you.

来源：https://stackoverflow.com/questions/5327545/adding-column-between-two-other-columns-in-sql-server