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IBM Db2 Database vs SQL Server comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jan 12, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

IBM Db2 Database
Ranking in Relational Databases Tools
6th
Average Rating
8.2
Reviews Sentiment
6.8
Number of Reviews
73
Ranking in other categories
No ranking in other categories
SQL Server
Ranking in Relational Databases Tools
1st
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
268
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of March 2025, in the Relational Databases Tools category, the mindshare of IBM Db2 Database is 7.0%, up from 6.5% compared to the previous year. The mindshare of SQL Server is 19.3%, down from 23.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools
 

Featured Reviews

SimonHiggins - PeerSpot reviewer
Very scalable with high availability and excellent technical support
The good thing is that there are improvements coming with later function levels for the z/OS Db2. I'd like it if, with the operating system that we've got, z/OS, on the mainframe, it would allow us to refresh the hardware to run Linux dockers on the mainframe. This means this might give us opportunities for different ways of coming into the Db2 environment in the future. We just want a bit more integration with Linux. That said, we are already seeing Linux more readily available on the mainframe environment. Not only have we got the premium operating systems on OS. We can run LPARs on the same mainframe footprint that is also supporting Linux. This is what has improved and made the mainframe environment more competitive. We're also looking at AI for Db2 as well, and machine learning for the future. We know that AI has come out, that we're going to get that, and we're going to evaluate that product next year for Db2. That said, I haven't got any real complaints about Db2 on the mainframe. For the most part, a lot of the problems we have nowadays are to do with communication between the various teams that you would class as stakeholders.
Azizul Haque - PeerSpot reviewer
It has eliminated all kinds of inconsistencies, and it is reliable, secure, and fast
I don't know whether SQL Server can support large organizations where the database size is more than 100 GB. It might be because of SQL Server, or it might be because of the programming of the software vendor, but a lot of people think that it is a problem with SQL Server. It can't handle a large amount of data or large data size. In terms of its usage, about 90% of our applications are running on the SQL Server database. We have around 1,600 users for our software, and all the applications are connected to the SQL Server database.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"The stability of IBM Db2 Database is stable. We have not faced any downtime in one year. Our work is mostly during business hours and during that time, we haven't faced any downtime."
"It's a very mature product."
"The solution's querying feature is most valuable. It allows me to retrieve data quickly."
"IBM Db2 was much cheaper as a package than using other products. This is because IBM supplied a package with its product. It's an application. So it was much more efficient and a stronger competitor in that regard."
"We had a crash of the backup system and the IBM DB2 was always up and consistent. It's robust, and for us, it was always up and running."
"The most valuable features are with the industrial side."
"Your iOS, your throughputs, your performance cycles, you cannot touch it with Microsoft or with Oracle scalability-wise. That is far and away the most scalable systems and the highest performing systems of the set of them."
"The solution helps secure the database."
"I would say that it is a stable product."
"Its usability is very good. Its performance is satisfactory."
"The product is easy to use."
"The solution is very intuitive and easy to use."
"As a data warehouse and storage solution, it's quite good."
"We use SQL Server for various data management scenarios. It allows us to query data, some of which spans over twenty years. We generate reports and perform analyses using this tool. It also comes with backup and recovery tools, which are essential features of the database engine."
"SQL Server is a stable product."
"It is an extremely stable solution."
 

Cons

"The usage of Db2 could be simplified, as it is quite complex and requires substantial knowledge of Db2 and zOS."
"The solution could improve by providing more integration."
"The application development requires a Java developer and not every company has these resources."
"IBM Db2 Database could improve the user-defined functions. There are some user-defined functions that are missing, such as the spring functions. I used to have Teradata for my projects and I was used to working in the environment. They had a good set of user-defined functions."
"Db2 interface could be improved a bit. Comparing it to Oracle, Db2's interfaces could be improved."
"They should simplify the management of Db2 as a relational database system. There should be the simplification of management. This is probably one of the most important asks for being successful in the future."
"Performance is something that can be improved with DB2."
"Some of the internal rearrangement in the administration is not as straightforward as it is in competing products."
"SQL Server has good performance, but it could be better."
"From a development perspective, the solution needs to be a lot easier to understand or it needs to be easier to implement API packages for connection pooling so we don't have connection interruptions when, let's say, a hundred people simultaneously access the network on a given system, utilizing a specific or single database."
"I would like to see native plugins built for other platforms versus having to buy third-party plugins to tap into S3 buckets and AWS Cloud. Right now, it does not have those built-in plugins."
"The interface of the tool has certain shortcomings, making it an area where improvements are required."
"Price could be cheaper, and access to reporting tools should be better."
"The performance degrades when the data is huge."
"I do not think SQL Server is suited for a typical database warehouse environment. However, people do use SQL Server for data warehouse environments but the best use case is for very small databases. If somebody wants to store more than 10 TB of data querying then the performance really degrades. The performance should be improved in the future to allow more scalability."
"The upgrades are unstable."
 

Pricing and Cost Advice

"We did not buy it. It came with our hardware without any complimentary maintenance. If I compare Db2 Database with Oracle Database, its price is lower than Oracle Database."
"It is expensive. The price depends on the size of the machine on which you are installing the Db2 and the features you are using. It also depends on the country. IBM has different policies and different options for payment for this product."
"It is expensive."
"They are competitive and honest (compared to how peer firms approach licensing conversations). ​"
"I think that everyone knows that with IBM the standard price is higher than the others."
"Licensing fees are on a yearly basis."
"The solution's hardware and subscription model for support are very expensive."
"Among Microsoft SQL Server, Oracle, and Db2, Microsoft SQL Server is the cheapest one, and Oracle is the most expensive one. Db2 is in the middle. As compared to SQL Server, its price could go down. It will be good for customers."
"The cost associated with SQL Servers is on the higher side."
"SQL Server offers three versions. You can get a free trial for 30 days."
"There is a license required for the use of SQL Server and we are on an annual subscription."
"The solution is on a pay-per-use pricing model."
"Some of our clients purchase the license and others do not, they use Express SQL Server."
"The licenses are purchased annually."
"I believe the licensing to be on an annual basis."
"The price of SQL Server could be better in the African market. The licensing model needs to be improved, it is confusing."
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Top Industries

By visitors reading reviews
Educational Organization
62%
Financial Services Firm
8%
Computer Software Company
4%
Government
3%
Educational Organization
53%
Financial Services Firm
8%
Computer Software Company
6%
Manufacturing Company
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

What do you like most about IBM Db2 Database?
Db2 database scalability and performance capabilities match our database needs. It covers pretty much everything a database administrator or engineer might need.
What is your experience regarding pricing and costs for IBM Db2 Database?
IBM Db2 is an expensive solution. While I am not heavily involved with pricing, additional companies provide capabilities or products like those from BMC, which many installations might also purchase.
What needs improvement with IBM Db2 Database?
The user interface is old and needs to be improved. It doesn't match the responsive and suggestion-rich UI of cloud solutions. New functions don't come to mind.
Would you say the price of SQL Server is high compared to that of similar products?
SQL Server is fairly priced because it has various editions, depending on the number of users, servers, or core packs you are using. If you compare the product to others in this category, the price...
Has using SQL Server helped your organization in any way?
SQL Server has helped my organization through partitioning to distribute the workload, as it splits them up into smaller pieces so the machines can easily deal with it. However, this comes with a h...
Which authentication mode is best for SQL Server?
My company connects through SQL Server authentication. We have company Windows accounts, but we do not want to connect the two, out of security concerns and to keep things separated for our own pur...
 

Comparisons

 

Also Known As

DB2
Microsoft SQL Server, MSSQL, MS SQL
 

Overview

 

Sample Customers

Knorr-Bremse, Mizuho Bank Ltd., Australian Government Department of Defence, SCHWENK Zement, Friedhelm Loh Group, YAZAKI Europe Limited, Ekornes ASA, Baldor Electric, VSN Systemen BV, Lion Brewery (Ceylon) PLC, PLANSEE Group, TE Connectivity, Hansgrohe SE, Openmatics, University of Toronto
Microsoft SQL Server is used by businesses in every industry, including Great Western Bank, Aviva, the Volvo Car Corporation, BMW, Samsung, Principality Building Society, Wellmark Blue Cross and Blue Shield, and the Catholic District School Board of Eastern Ontario.
Find out what your peers are saying about IBM Db2 Database vs. SQL Server and other solutions. Updated: March 2025.
842,010 professionals have used our research since 2012.