Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
444 views
in Technique[技术] by (71.8m points)

alter table - Adding column between two other columns in SQL server

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?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

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

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...