SQL SERVER恢复数据库添加了新列/ PK？

Question

Im adding a new column with primary keys to a database, but there is data within it. However they want to backup the data and then restore it to the new database with the new column/primary key. When restoring a database is there an option you can select to make sure it doesn't get rid of the new column, and just inserts the database with the new column there (this new column also has a default value as well).

Thanks

Answer 1

The backup and restore process will take an exact snapshot of your data and restore it identically. If you want to "merge" two databases then you will need to script both the added columns, tables and data to the production database. There are tools in SQL management studio for this.

re comments

Dropping an index of key will not affect the underlying data. It may block you accessing it while the key is being created (the clustered index is the order the data is stored in the data file). If you want to transfer data between dev and prduction it may be quicker to resore a copy of dev as a spare database on the prod seerver and script an insert between the two databases. Note SQL takes restore seriously and uses all resources to do it as quickly as possible (to the detriment of all other SQL processes) so truncate every table you dont need to transfer data from before backup

The primary key is the index which determins the idenity of each unique row. The custered index determins the order the data is stored and accessed in the file. If you have two rows with the same primary key (which may not be unique) then SQL will add a uniquifying column in the background. SQL will lock the table whist a new clustered index is being implimneted. the underlying data istself will not be changed.

Answer 2

You can restore last backup to a new temp Database then use Import menu in management studio to copy your old data to new database.

Check this link for more about import data.