The following table provides summary statistics for permanent job vacancies advertised in London with a requirement for ERD skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited ERD over the 3 months to 30 March 2017 with a comparison to the same period in the previous 2 years.

Entity-Relationship Diagram (ER Diagram)
England / London
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 586 618 641
Rank change year-on-year +32 +23  
Permanent jobs citing ERD 1 33 6
As % of all permanent IT jobs advertised in London 0.003% 0.078% 0.014%
As % of the Processes & Methodologies category 0.003% 0.086% 0.016%
Number of salaries quoted 1 24 2
Median salary £90,000 £53,750 £56,250
Median salary % change year-on-year +67.44% -4.44%  
UK excluding London median salary £50,000 £60,000 £41,000
% change year-on-year -16.66% +46.34%  

ERD is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in London with a requirement for process and methodology skills.

Process & Methodology Skills
London
Permanent job vacancies with a requirement for process and methodology skills 30581 38152 37559
As % of all permanent IT job vacancies advertised in London 90.25% 89.74% 87.62%
Number of salaries quoted 25667 32601 31342
Median salary £60,000 £57,500 £57,500
Median salary % change year-on-year +4.34% -  
90% offered a salary of more than £40,000 £38,695 £37,500
10% offered a salary of more than £85,000 £80,000 £85,000
UK excluding London median salary £45,000 £45,000 £43,000
% change year-on-year - +4.65%  

ERD
Job Vacancy Trend in London

The job posting trend of jobs advertised in London citing ERD as a proportion of all permanent or contract IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for ERD in London

ERD
Salary Trend in London

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing ERD in London.

Salary trend for ERD in London

For the 6 months to 30 March 2017, IT jobs citing ERD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads across the London region with a requirement for ERD.

1 6 (100.00%) Data Modelling
2 4 (66.67%) Data Warehouse
2 4 (66.67%) SQL Server
2 4 (66.67%) Data Management
2 4 (66.67%) Data Integration
2 4 (66.67%) Data Quality
2 4 (66.67%) Master Data Management
3 3 (50.00%) Microsoft
3 3 (50.00%) ETL
3 3 (50.00%) Business Intelligence
4 2 (33.33%) Star Schema
4 2 (33.33%) EAI
4 2 (33.33%) Oracle
4 2 (33.33%) MS Excel
4 2 (33.33%) SQL
4 2 (33.33%) XML
4 2 (33.33%) UML
4 2 (33.33%) Informatica
4 2 (33.33%) Migration
4 2 (33.33%) Data Analysis
4 2 (33.33%) Technical Architecture
4 2 (33.33%) Degree
4 2 (33.33%) Computer Science
4 2 (33.33%) Use Case
4 2 (33.33%) Prototyping
4 2 (33.33%) Single Customer View
4 2 (33.33%) Data Structures
4 2 (33.33%) Logical Data Model
4 2 (33.33%) Physical Data Model
4 2 (33.33%) Enterprise Data Warehouse

ERD
Co-occurring IT Skills in London by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Applications
1 2 (33.33%) MS Excel
Database & Business Intelligence
1 4 (66.67%) Data Warehouse
1 4 (66.67%) SQL Server
2 2 (33.33%) Enterprise Data Warehouse
2 2 (33.33%) Hadoop
2 2 (33.33%) NoSQL
2 2 (33.33%) Star Schema
3 1 (16.67%) Big Data
3 1 (16.67%) SQL Server Integration Services
General
1 1 (16.67%) Advertising
1 1 (16.67%) Legal
1 1 (16.67%) Retail
Job Titles
1 4 (66.67%) Architect
2 3 (50.00%) Business Intelligence Lead
3 2 (33.33%) Business Intelligence Architect
3 2 (33.33%) Data Architect
3 2 (33.33%) Lead Architect
4 1 (16.67%) Analyst
4 1 (16.67%) Business Intelligence Specialist
4 1 (16.67%) Development Analyst
4 1 (16.67%) Systems Analyst
4 1 (16.67%) Systems Development Analyst
Libraries, Frameworks & Software Standards
1 2 (33.33%) Kafka
1 2 (33.33%) XML
2 1 (16.67%) .NET
2 1 (16.67%) ASP.NET
2 1 (16.67%) Web Services
Miscellaneous
1 2 (33.33%) Computer Science
1 2 (33.33%) Data Structures
1 2 (33.33%) Enterprise Software
1 2 (33.33%) Semantic Web
Processes & Methodologies
1 6 (100.00%) Data Modelling
2 4 (66.67%) Data Integration
2 4 (66.67%) Data Management
2 4 (66.67%) Master Data Management
3 3 (50.00%) Business Intelligence
3 3 (50.00%) ETL
4 2 (33.33%) Analytics
4 2 (33.33%) Data Analysis
4 2 (33.33%) Data Engineering
4 2 (33.33%) Data Transformation
4 2 (33.33%) EAI
4 2 (33.33%) Information Architecture
4 2 (33.33%) Logical Data Model
4 2 (33.33%) Metadata Management
4 2 (33.33%) Migration
4 2 (33.33%) Physical Data Model
4 2 (33.33%) Prototyping
4 2 (33.33%) Technical Architecture
4 2 (33.33%) UML
4 2 (33.33%) Use Case
Programming Languages
1 2 (33.33%) SQL
Qualifications
1 2 (33.33%) Degree
Quality Assurance & Compliance
1 4 (66.67%) Data Quality
Vendors
1 3 (50.00%) Microsoft
2 2 (33.33%) Informatica
2 2 (33.33%) Oracle