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# IBM Db2 vs PostgreSQL Comparison - What are their main differences?

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IBM Db2PostgreSQL[+ Add Product](#)

Pricing

**IBM Db2**
Free Trial

**Free Trial** 1 License · Db2 On Cloud - Lite 

**PostgreSQL**
No pricing available

**Pricing Insights**
from reviews

Time to Implement

**IBM Db2**
5 months

Based on 6 responses

**PostgreSQL**
2 monthsFaster

Based on 73 responses

Return on Investment

**IBM Db2**
22 months

Based on 5 responses

**PostgreSQL**
8 months14 months sooner

Based on 47 responses

Perceived Cost

**IBM Db2**
$$$$$

**PostgreSQL**
$$$$$

Average Discount

**IBM Db2**
21%10% more

**PostgreSQL**
11%

**Pros & Cons**
from reviews

**IBM Db2**
[
Performance (14)
](https://www.g2.com/products/ibm-db2/reviews?filters%5Bsentiment_snippet%5D=1481359&qs=pros-and-cons#reviews)[
Reliability (13)
](https://www.g2.com/products/ibm-db2/reviews?filters%5Bsentiment_snippet%5D=1482184&qs=pros-and-cons#reviews)[
Complex Setup (4)
](https://www.g2.com/products/ibm-db2/reviews?filters%5Bsentiment_snippet%5D=1481925&qs=pros-and-cons#reviews)[
Expensive (4)
](https://www.g2.com/products/ibm-db2/reviews?filters%5Bsentiment_snippet%5D=1481403&qs=pros-and-cons#reviews)

**PostgreSQL**
[
Features (16)
](https://www.g2.com/products/postgresql/reviews?filters%5Bsentiment_snippet%5D=1373123&qs=pros-and-cons#reviews)[
Ease of Use (13)
](https://www.g2.com/products/postgresql/reviews?filters%5Bsentiment_snippet%5D=1373593&qs=pros-and-cons#reviews)[
Beginner Unfriendliness (7)
](https://www.g2.com/products/postgresql/reviews?filters%5Bsentiment_snippet%5D=1374094&qs=pros-and-cons#reviews)[
Complexity (6)
](https://www.g2.com/products/postgresql/reviews?filters%5Bsentiment_snippet%5D=1373765&qs=pros-and-cons#reviews)

Integrations

**IBM Db2**
[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_59dddda64a056efaca287f0d6c23b635/ca-database-management-for-db2-for-z-os.png "Product Avatar Image")

CA Database Management for...

](https://www.g2.com/products/ca-database-management-for-db2-for-z-os/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_24bb2b0b5af8e7d875ea09d767bcb097/ibm-cognos-analytics.jpg "Product Avatar Image")

IBM Cognos Analytics

](https://www.g2.com/products/ibm-cognos-analytics/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_0a2625dd31c2343f886384c44a1271e5/ibm-datastage.jpg "Product Avatar Image")

IBM DataStage

](https://www.g2.com/products/ibm-datastage/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_022cd63d709f0009b5b02cb61914f87d/informatica-operational-integration.jpg "Product Avatar Image")

Informatica Operational Integration

](https://www.g2.com/products/informatica-operational-integration/reviews)[
View all
](https://www.g2.com/products/ibm-db2/integrations)

**PostgreSQL**
[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_4c82924bf37fb0c0c2cf8d7f5cc68986/angular-dev-angular.jpg "Product Avatar Image")

Angular

](https://www.g2.com/products/angular-dev-angular/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_d99c715051d74e27de9fd48624b6561e/apache-tomcat.png "Product Avatar Image")

Tomcat

](https://www.g2.com/products/apache-tomcat/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_bde6cd3bdabd1f16c41327bd71f4dee5/cpanel.png "Product Avatar Image")

cPanel

](https://www.g2.com/products/cpanel/reviews)[

 ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_a6c205d533dba77b318af96d91beb2ac/databricks.jpeg "Product Avatar Image")

Databricks

](https://www.g2.com/products/databricks/reviews)[
View all
](https://www.g2.com/products/postgresql/integrations)

Screenshots

**IBM Db2**
No screenshot available

**PostgreSQL**
 ![PostgreSQL screenshot](https://images.g2crowd.com/cdn-cgi/image/width=600,height=600,fit=scale-down,format=auto,onerror=redirect,/https://images.g2crowd.com/uploads/attachment/file/20331/uploads_2Fab7b5997-a58a-4539-8306-c978c4e82158_2FPostgreSQL-9-0-3_3.png)

**Ratings**
from reviews

Meets Requirements

**IBM Db2**

8.5

8.5490

**PostgreSQL**

9.1

9.1559

Ease of Use

**IBM Db2**

8.0

8.0499

**PostgreSQL**

8.5

8.5565

Ease of Setup

**IBM Db2**

7.7

7.7265

**PostgreSQL**

8.4

8.4294

Ease of Admin

**IBM Db2**

7.7

7.7243

**PostgreSQL**

8.2

8.2251

Quality of Support

**IBM Db2**

8.1

8.1463

**PostgreSQL**

7.9

7.9452

Has the product been a good partner in doing business?

**IBM Db2**

8.3

8.3235

**PostgreSQL**

8.5

8.5199

Product Direction (% positive)

**IBM Db2**

6.8

6.8458

**PostgreSQL**

8.5

8.5544

**Features**
ratings from reviews

Relational Databases[Hide 24 FeaturesShow 24 Features](javascript:void(0);)

8.5

372

8.9

522

Management 

Data Schema

8.6

60

9.1(won by 0.5)

129

 (There is a greater than 0.5 difference between this product's rating and its competitors)

Query Language

8.4

62

9.2(won by 0.8)

125

 (There is a greater than 0.5 difference between this product's rating and its competitors)

ACID - Complaint

8.2

53

9.2(won by 1.0)

115

 (There is a greater than 0.5 difference between this product's rating and its competitors)

Data Replication

8.5

55

8.9(won by 0.4)

115

Support 

Text Search

8.0

57

8.7(won by 0.7)

117

 (There is a greater than 0.5 difference between this product's rating and its competitors)

Data Types

8.4

60

9.1(won by 0.7)

135

 (There is a greater than 0.5 difference between this product's rating and its competitors)

Languages

7.9

60

9.1(won by 1.2)

114

 (There is a greater than 0.5 difference between this product's rating and its competitors)

Operating Systems

8.4

61

9.1(won by 0.7)

119

 (There is a greater than 0.5 difference between this product's rating and its competitors)

Security

Database Locking

8.5

60

8.7(won by 0.2)

120

Access Control

8.8

60

9.0(won by 0.2)

122

Encryption

8.4

58

8.7(won by 0.3)

113

Authentication

8.4

56

8.9(won by 0.5)

115

 (There is a greater than 0.5 difference between this product's rating and its competitors)

Performance 

Disaster Recovery

8.6(tied score)

64

8.6(tied score)

110

Data Concurrency

8.6

58

8.8(won by 0.2)

120

Workload Management

8.5

57

8.7(won by 0.2)

112

Advanced Indexing

8.4

57

8.7(won by 0.3)

121

Query Optimizer

8.4

58

8.6(won by 0.2)

117

Database Features

Storage

8.7

307

9.0(won by 0.3)

468

Availability

8.8

311

9.0(won by 0.2)

473

Stability

8.8

311

9.0(won by 0.2)

481

Scalability

8.4

306

8.6(won by 0.2)

464

Security

8.8(won by 0.1)

303

8.7

447

Data Manipulation

8.4

303

8.8(won by 0.4)

463

Query Language

8.5

309

9.0(won by 0.5)

471

 (There is a greater than 0.5 difference between this product's rating and its competitors)

Data Warehouse Automation[Hide 38 FeaturesShow 38 Features](javascript:void(0);)

8.0

11

Not enough data

Automation

Workflow Automation

8.3(won by default)

9

Not enough data

Multi-platform support

8.1(won by default)

9

Not enough data

Data Management

8.3(won by default)

9

Not enough data

Data Simplicity

8.5(won by default)

9

Not enough data

Functionality

Documentation management

7.4(won by default)

9

Not enough data

Platform support

8.1(won by default)

9

Not enough data

Template functionality

8.0(won by default)

9

Not enough data

Administration

Error Alerts

8.3(won by default)

8

Not enough data

Service Automation

7.7(won by default)

8

Not enough data

Workflow management

7.7(won by default)

8

Not enough data

Agentic AI - Data Warehouse Automation

Proactive Assistance

Not enough data

Not enough data

Additional Functionality

Parallel Processing

Not enough data

Not enough data

Ad hoc Analysis

Not enough data

Not enough data

Multiple Data Sources

Not enough data

Not enough data

API

Not enough data

Not enough data

In-Database Processing

Not enough data

Not enough data

Monitoring

Not enough data

Not enough data

Real-Time Reporting

Not enough data

Not enough data

Data Synchronization

Not enough data

Not enough data

Real-Time Monitoring

Not enough data

Not enough data

Data Connectors

Not enough data

Not enough data

Performance Metrics

Not enough data

Not enough data

Ad hoc Reporting

Not enough data

Not enough data

Alerts/Notifications

Not enough data

Not enough data

Access Controls/Permissions

Not enough data

Not enough data

Drag & Drop

Not enough data

Not enough data

Data Visualization

Not enough data

Not enough data

Data Import/Export

Not enough data

Not enough data

Match & Merge

Not enough data

Not enough data

Data Transformation

Not enough data

Not enough data

Secure Data Storage

Not enough data

Not enough data

Data Extraction

Not enough data

Not enough data

AI Copilot

Not enough data

Not enough data

Customizable Reports

Not enough data

Not enough data

Activity Dashboard

Not enough data

Not enough data

Data Migration

Not enough data

Not enough data

In-Memory Processing

Not enough data

Not enough data

Data Mapping

Not enough data

Not enough data

Data Warehouse[Hide 48 FeaturesShow 48 Features](javascript:void(0);)

8.2

63

Not enough data

Data Management

Data Integration

8.6(won by default)

52

|

Verified

Not enough data

Data Compression

8.1(won by default)

48

|

Verified

Not enough data

Data Quality

8.6(won by default)

49

|

Verified

Not enough data

Built-In Data Analytics

8.2(won by default)

48

|

Verified

Not enough data

In-Database Machine Learning

7.5(won by default)

34

|

Verified

Not enough data

Data Lake Analytics

7.6(won by default)

34

|

Verified

Not enough data

ETL - Extract Transfer Load

Not enough data

Not enough data

Data Capture and Transfer

Not enough data

Not enough data

Real-Time Analytics

Not enough data

Not enough data

Reporting/Analytics

Not enough data

Not enough data

Integration

AI/ ML Integration

7.8(won by default)

43

|

Verified

Not enough data

BI Tool Integration

8.1(won by default)

45

|

Verified

Not enough data

Data lake Integration

8.1(won by default)

42

|

Verified

Not enough data

Deployment

On-Premise

8.4(won by default)

50

|

Verified

Not enough data

Cloud

7.8(won by default)

41

|

Verified

Not enough data

Performance 

Scalability

8.6(won by default)

51

|

Verified

Not enough data

Security

Data Governance

8.7(won by default)

46

|

Verified

Not enough data

Data Security

9.0(won by default)

35

|

Verified

Not enough data

Generative AI

AI Text Generation

8.3(won by default)

8

Not enough data

AI Text Summarization

8.3(won by default)

8

Not enough data

Generative AI

Not enough data

Not enough data

Additional Functionality

Parallel Processing

Not enough data

Not enough data

Ad hoc Analysis

Not enough data

Not enough data

Multiple Data Sources

Not enough data

Not enough data

API

Not enough data

Not enough data

In-Database Processing

Not enough data

Not enough data

Monitoring

Not enough data

Not enough data

Real-Time Reporting

Not enough data

Not enough data

Data Synchronization

Not enough data

Not enough data

Real-Time Monitoring

Not enough data

Not enough data

Data Connectors

Not enough data

Not enough data

Performance Metrics

Not enough data

Not enough data

Ad hoc Reporting

Not enough data

Not enough data

Alerts/Notifications

Not enough data

Not enough data

Access Controls/Permissions

Not enough data

Not enough data

Drag & Drop

Not enough data

Not enough data

Data Visualization

Not enough data

Not enough data

Data Import/Export

Not enough data

Not enough data

Match & Merge

Not enough data

Not enough data

Data Transformation

Not enough data

Not enough data

Secure Data Storage

Not enough data

Not enough data

Data Extraction

Not enough data

Not enough data

AI Copilot

Not enough data

Not enough data

Customizable Reports

Not enough data

Not enough data

Activity Dashboard

Not enough data

Not enough data

Data Migration

Not enough data

Not enough data

In-Memory Processing

Not enough data

Not enough data

Data Mapping

Not enough data

Not enough data

Database as a Service (DBaaS)[Hide 17 FeaturesShow 17 Features](javascript:void(0);)

8.7

78

Not enough data

Configuration

Application Performance

8.5(won by default)

65

Not enough data

Orchestration

8.1(won by default)

60

Not enough data

Database Monitoring

8.5(won by default)

66

Not enough data

Anomaly Detection

8.3(won by default)

61

Not enough data

Network Security

8.6(won by default)

62

Not enough data

Database Administration

Provisioning

8.6(won by default)

60

Not enough data

Governance

8.8(won by default)

60

Not enough data

Auditing

8.8(won by default)

59

Not enough data

Availability

Scalability

8.9(won by default)

63

Not enough data

Backup

9.1(won by default)

62

Not enough data

Archiving

8.8(won by default)

63

Not enough data

Indexing

8.9(won by default)

63

Not enough data

Security

Data Masking

8.4(won by default)

41

Not enough data

Authentication And Single Sign-On

8.8(won by default)

42

Not enough data

Data Anonymization

8.8(won by default)

41

Not enough data

Data Management

Data Replication

8.7(won by default)

45

Not enough data

Advanced Data Analytics

8.6(won by default)

44

Not enough data

NoSQL Databases[Hide 7 FeaturesShow 7 Features](javascript:void(0);)

8.7

368

Not enough data

Database Features

Storage

8.7

307

9.0(won by 0.3)

468

Availability

8.8

311

9.0(won by 0.2)

473

Stability

8.8

311

9.0(won by 0.2)

481

Scalability

8.4

306

8.6(won by 0.2)

464

Security

8.8(won by 0.1)

303

8.7

447

Data Manipulation

8.4

303

8.8(won by 0.4)

463

Query Language

8.5

309

9.0(won by 0.5)

471

 (There is a greater than 0.5 difference between this product's rating and its competitors)

User Insights

Reviewers' Company Size

[![IBM Db2](https://images.g2crowd.com/uploads/product/hd_favicon/1553782253/ibm-db2.svg "IBM Db2")](https://www.g2.com/products/ibm-db2/reviews)

IBM Db2

Small-Business(50 or fewer emp.)

13.5%

Mid-Market(51-1000 emp.)

20.4%

Enterprise(\> 1000 emp.)

66.1%

[![PostgreSQL](https://images.g2crowd.com/uploads/product/image/thumb_square/thumb_square_251be2af3ae607c45c14e816eaa1cf41/postgresql.png "PostgreSQL")](https://www.g2.com/products/postgresql/reviews)

PostgreSQL

Small-Business(50 or fewer emp.)

36.1%

Mid-Market(51-1000 emp.)

34.3%

Enterprise(\> 1000 emp.)

29.6%

Small-Business

(50 or fewer emp.)

13.5%

36.1%

Mid-Market

(51-1000 emp.)

20.4%

34.3%

Enterprise

(\> 1000 emp.)

66.1%

29.6%

Reviewers' Industry

[![IBM Db2](https://images.g2crowd.com/uploads/product/hd_favicon/1553782253/ibm-db2.svg "IBM Db2")](https://www.g2.com/products/ibm-db2/reviews)
IBM Db2

Information Technology and Services

21.7%

Banking

11.7%

Computer Software

10.0%

Financial Services

7.2%

Insurance

5.8%

Other

43.6%

[![PostgreSQL](https://images.g2crowd.com/uploads/product/image/thumb_square/thumb_square_251be2af3ae607c45c14e816eaa1cf41/postgresql.png "PostgreSQL")](https://www.g2.com/products/postgresql/reviews)
PostgreSQL

Information Technology and Services

27.3%

Computer Software

23.0%

Financial Services

4.2%

Internet

4.2%

Telecommunications

2.8%

Other

38.5%

FAQs

## IBM Db2 vs PostgreSQL FAQs

Generated using AI

Last updated: August 14, 2026

### What is the difference between PostgreSQL vs IBM Db2?

PostgreSQL stands out for its open-source flexibility and ease of use, while IBM Db2 is recognized for enterprise-grade reliability, security, and scalability.

| [PostgreSQL](https://www.g2.com/products/postgresql/reviews) | [IBM Db2](https://www.g2.com/products/ibm-db2/reviews) |
| --- | --- |
| 4.4/5 (684 reviews) | 4.1/5 (683 reviews) |
| Small-Business | Enterprise |
| 8.4 | 7.7 |
| 7.9 | 8.1 |
| Reliability, open source, flexibility | Performance, reliability, security |

### How do the pricing models of PostgreSQL and IBM Db2 compare?

PostgreSQL is considered the stronger value due to its open-source model and higher satisfaction with cost, while IBM Db2 is noted for higher licensing and support costs.

- **PostgreSQL:** Reviewers consistently highlight the absence of licensing fees and the cost savings of open source, with many citing reduced operational expenses and strong ROI.
- **IBM Db2:** Reviewers frequently mention high licensing and support costs, especially for enterprise features, but also note advanced compression and performance as offsetting factors for large-scale deployments.
- **Switching reasons:** Several reviewers cite moving to PostgreSQL to avoid proprietary licensing costs and to gain flexibility without vendor lock-in.

### What are the best alternatives to PostgreSQL and IBM Db2?

The top 3 alternatives to PostgreSQL and IBM Db2 are Oracle Database, MS SQL, and MySQL.

| Product | G2 Rating (reviews) | Largest Segment | Pricing Insight | Top Reviewer-Cited Strength |
| --- | --- | --- | --- | --- |
| [PostgreSQL](https://www.g2.com/products/postgresql/reviews) | 4.4/5 (684 reviews) | Small-Business | Open source, no licensing fees | Reliability, open source, flexibility |
| [IBM Db2](https://www.g2.com/products/ibm-db2/reviews) | 4.1/5 (683 reviews) | Enterprise | High licensing and support costs | Performance, reliability, security |
| [Oracle Database](https://www.g2.com/products/oracle-database/reviews) | 4.3/5 (1020 reviews) | Enterprise | — | Enterprise-grade reliability and scalability |
| [MS SQL](https://www.g2.com/products/microsoft-sql-server/reviews) | 4.4/5 (2287 reviews) | Enterprise | — | Integration with Microsoft ecosystem |
| [MySQL](https://www.g2.com/products/mysql/reviews) | 4.4/5 (1682 reviews) | Small-Business | — | Speed for simple read-heavy workloads |

### Which Relational Databases features should I prioritize when comparing PostgreSQL and IBM Db2?

Buyers should prioritize security, scalability, integration capabilities, performance, and ease of use when comparing PostgreSQL and IBM Db2.

- **Security:** PostgreSQL (4 all-time mentions), IBM Db2 (11 all-time mentions); both products are frequently cited for strong security features.
- **Scalability:** PostgreSQL (10 all-time mentions), IBM Db2 (11 all-time mentions); reviewers highlight both for handling large datasets and growth.
- **Integration capabilities:** PostgreSQL (6 all-time mentions for easy integrations), IBM Db2 (6 all-time mentions for integrations); PostgreSQL is often praised for broad third-party tool compatibility.
- **Performance:** PostgreSQL (6 all-time mentions), IBM Db2 (14 all-time mentions); IBM Db2 is especially noted for high performance in enterprise workloads.
- **Ease of use:** PostgreSQL (13 all-time mentions), IBM Db2 (10 all-time mentions); PostgreSQL is favored for its user-friendly experience, while IBM Db2 is recognized for robust enterprise features.

### What are the pros and cons of PostgreSQL vs IBM Db2?

PostgreSQL's headline strength is open-source flexibility and reliability, while IBM Db2's is enterprise-grade performance and security.

- **PostgreSQL strengths:** Features (16 all-time mentions), ease of use (13), open source (10), reliability (10), scalability (10), flexibility (8), easy integrations (6), performance (6), data analytics (6).
- **PostgreSQL trade-offs:** Beginner unfriendliness (7), complexity (6), learning curve (5), slow performance for large/complex queries (5), high hardware requirements (4).
- **IBM Db2 strengths:** Performance (14), reliability (13), scalability (11), security (11), ease of use (10), customer support (7), easy integrations (6), high availability (5).
- **IBM Db2 trade-offs:** Complex setup (4), expensive licensing/support (4), learning curve (4), complexity (3), difficult setup (3).

### Is PostgreSQL or IBM Db2 better for small businesses?

PostgreSQL is the better fit for small businesses, as it is most popular in the Small-Business segment and praised for cost-effectiveness and ease of use.

- **PostgreSQL:** Largest segment is Small-Business; reviewers highlight its open-source model, low operational costs, and flexibility for smaller teams.
- **IBM Db2:** Largest segment is Enterprise; reviewers note its strengths in large-scale, mission-critical environments, but mention higher costs and complexity for smaller organizations.

### Which Relational Databases platform has better integrations?

PostgreSQL is favored for integrations, with reviewers citing broader compatibility and more frequent integration mentions.

- **PostgreSQL:** Integrates with Python (27 all-time mentions), Tableau (4), and Ruby on Rails (3); reviewers highlight its compatibility with a wide range of APIs, drivers, and connectors.
- **IBM Db2:** Integrates with IBM DataStage (1 all-time mention); reviewers note its strong integration within the IBM ecosystem but fewer third-party integration mentions.

### How do PostgreSQL and IBM Db2 compare on customer support?

IBM Db2 scores slightly higher on Quality of Support (8.1 vs 7.9), but the difference is below the materiality threshold, indicating near-parity in reviewer satisfaction.

- **PostgreSQL:** Reviewers describe strong community support and abundant documentation, with some noting limited official vendor support unless using a managed provider.
- **IBM Db2:** Reviewers highlight responsive enterprise support, knowledgeable staff, and effective problem resolution, especially for mission-critical workloads.

### Which is easier to implement, PostgreSQL or IBM Db2?

PostgreSQL scores higher on Ease of Setup (8.4 vs 7.7), but the difference is below the materiality threshold, indicating similar implementation experiences.

- **PostgreSQL:** Reviewers frequently mention straightforward setup, especially for small to mid-sized projects, with some noting a steeper learning curve for advanced configurations.
- **IBM Db2:** Reviewers describe setup as intuitive for enterprise environments, with plug-and-play installation, but note increased complexity for advanced features and larger deployments.

### Which product has better Security?

IBM Db2 is more frequently cited for Security, with 11 all-time mentions compared to PostgreSQL's 4.

- **PostgreSQL:** Security (4 all-time mentions); reviewers highlight robust access control, row-level security, and audit logging, but note that some advanced encryption features require additional setup.
- **IBM Db2:** Security (11 all-time mentions); reviewers consistently cite strong built-in security features, granular access control, native encryption, and compliance support (e.g., GDPR, HIPAA).

Alternatives

**IBM Db2 Alternatives**

 ![Oracle Database](https://images.g2crowd.com/uploads/product/image/thumb_square/thumb_square_82f55e945509bff7b8009e8024cfe73c/oracle-database.jpg "Oracle Database")

[
Oracle Database
](/products/oracle-database/reviews)

 ![Amazon Relational Database Service (RDS)](https://images.g2crowd.com/uploads/product/hd_favicon/1533130188/amazon-relational-database-service-rds.svg "Amazon Relational Database Service (RDS)")

[
Amazon Relational Database...
](/products/amazon-relational-database-service-rds/reviews)

 ![SAP HANA Cloud](https://images.g2crowd.com/uploads/product/hd_favicon/b5f8f986beca96ab0027c693ee762fb9/sap-hana-cloud-2025-10-01.svg "SAP HANA Cloud")

[
SAP HANA Cloud
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