SQLServerCentral Article

Review of SQLCompare


SQL Compare by Red-Gate is a product to let you compare two SQL Server databases and generate a 

script to sync any differences in objects (tables, procedures, even users and roles). This review 

is based on v1.51, running in the evaluation mode (no license key entered). My goal in this review is 

to give you a good overview of how the product works so that you can decide whether to invest 

your time in evaluating it.

Red-Gate offers a 14-day evaluation download, all they require is your name and email address - 

pretty quick and easy. The download itself is available in both MSI and non-MSI versions, I chose 

the just over 4 meg MSI. I always like to see MSI packages (the Windows installer technology) rather 

than the older setup.exe, it's a good sign that the author has kept up with technology. The 

install went smoothly.

To use the product, you choose two databases to compare - which can be on

different servers. For my 

testing I compared a local copy of the SQLServerCentral database with the live one running on our 

host server. This was done over a RoadRunner connection and performance was good. It offers a 

number of options before you begin the compare to let you reduce the number of objects - a great 

feature, since there is no reason to look at ALL the objects in a db if you know that you just 

need to sync a change to a stored procedures (or whatever!).

The program works by scripting out the objects in each db, then first presenting a high level 

view of which objects do not match (either because the text of the script for that object is 

different) or because it exists on one server and not the other. This screenshot shows this 


You can then either select the objects you want to sync (the checkbox in the left most column) 

and generate a script, or you can drill down into each object by double clicking - see the next 

pic for an example:

As you look at the two scripts side by side, you may see differences that are not really 

differences. For instance, it may be just a difference in the case of the text, or it could be 

the comments that are different. In some cases those may matter, in others you may not care. SQL 

Compare offers quite a few settings to let you tailor how the compare is made. One option I 

thought was pretty nice was one to exclude fill factor from index compares - in most cases I 

would not want to change my index if this was the only difference. 

Once you've adjusted your options and maybe excluded items for the object that you don't need 

(permissions, triggers, indexes, more..), you can click a tab to look at the migration SQL - the 

change script. This gives you a chance to see exactly what you'll be executing for this 

particular object. The header comment is superb. It tells you which is the source and destination 

server, recommends that you review before running and that you run the script in pieces - fair 

diligence considering what the scripts will be doing!

I was able to come up with only a few complaints during my evaluation. The biggest is that when you're 

running the program, it shows up in the taskbar but not in the Alt-Tab sequence. Being a big 

Alt-Tab user, this was a major inconvenience! Another is that while the comments in the migration 

script encourage you to run the changes a piece at a time, the program doesn't give you an easy 

way to generate scripts to match this advice. It's either one big script, or you have to generate 

them one at a time. 

Overall I found the program to be robust AND easy to use. A single user license is $95, a site 

license is $450. Is it worth it? Yes, without a doubt. There is no way I could come close to 

building this tool for $95. And at that price, the savings from one to two uses would easily pay 

for the purchase. This is a good tool for the toolbox! If you're a current user of SQL Compare or 

evaluated the program after reading this review, click the tab below to add your comments - share 

your experience!

DISCLOSURE: Red-Gate provided me with a licensed copy of the product to evaluate and they are 

also donating a licensed copy to SQLServerCentral.com to be given away to a reader. At the time 

this was written Red-Gate was not an advertiser on SQLServerCentral.com.


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