I think you want this syntax: ALTER TABLE tb_TableName add constraint cnt_Record_Status Default '' for Record_Status. ... <看更多>

Column bar is varchar(50) now. Update: rollback finished after about 3 hours. I would still like to know why this took so long to rollback. sql- ... ... <看更多>

This alter table statement video will help you learn how to alter table in SQL and perform operations like add a column, delete a column and ... ... <看更多>