The following table provides summary statistics for contract job vacancies advertised in London with a requirement for Snowflake Schema skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Snowflake Schema over the 3 months to 29 March 2017 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

Snowflake Schema
England / London
3 months to
29 Mar 2017
Same period 2016 Same period 2015
Rank 403 433 400
Rank change year-on-year +30 -33  
Contract jobs citing Snowflake Schema 5 6 6
As % of all contract IT jobs advertised in London 0.026% 0.027% 0.028%
As % of the Database & Business Intelligence category 0.10% 0.11% 0.12%
Number of daily rates quoted 1 6 2
Median daily rate £450 £400 £338
Median daily rate % change year-on-year +12.50% +18.51%  
UK excluding London median daily rate - £450 £425
% change year-on-year - +5.88%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

Snowflake Schema is in the database and business intelligence skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in London with a requirement for database and business intelligence skills.

Contract Database & Business Intelligence Skills
London
Contract job vacancies with a requirement for database and business intelligence skills 4903 5431 5120
As % of all contract IT job vacancies advertised in London 25.06% 24.20% 24.06%
Number of daily rates quoted 3554 3905 3551
Median daily rate £490 £475 £450
Median daily rate % change year-on-year +3.15% +5.55%  
90% offered a daily rate of more than £350 £325 £310
10% offered a daily rate of more than £625 £620 £588
UK excluding London median daily rate £400 £388 £375
% change year-on-year +3.22% +3.33%  
Number of hourly rates quoted 18 36 40
Median hourly rate £30.00 £43.00 £22.83
Median hourly rate % change year-on-year -30.23% +88.34%  
90% offered a hourly rate of more than £17.80 £18.00 £14.70
10% offered a hourly rate of more than £109.50 £50.00 £55.00
UK excluding London median hourly rate £34.24 £32.50 £32.50
% change year-on-year +5.35% -  

Snowflake Schema
Job Vacancy Trend in London

The job posting trend of jobs advertised in London citing Snowflake Schema as a proportion of all contract or permanent IT jobs with a match in the Database & Business Intelligence category.

Job vacancy trend for Snowflake Schema in London

Snowflake Schema
Contractor Daily Rate Trend in London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Snowflake Schema in London.

Contractor daily rate trend for Snowflake Schema in London

For the 6 months to 29 March 2017, IT contractor jobs citing Snowflake Schema also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the London region with a requirement for Snowflake Schema.

1 19 (100.00%) SQL
1 19 (100.00%) SQL Server
1 19 (100.00%) Data Warehouse
2 18 (94.74%) Migration
3 17 (89.47%) Windows
3 17 (89.47%) Degree
4 15 (78.95%) Data Analysis
4 15 (78.95%) SQL Server Analysis Services
4 15 (78.95%) Hadoop
4 15 (78.95%) Banking
4 15 (78.95%) Microsoft Analysis Services
4 15 (78.95%) SQL Server Integration Services
4 15 (78.95%) Analytics
4 15 (78.95%) Big Data
4 15 (78.95%) Analytical Skills
5 14 (73.68%) Apache Pig
5 14 (73.68%) Hortonworks
5 14 (73.68%) Cloudera
5 14 (73.68%) Retail Banking
5 14 (73.68%) Corporate Banking
5 14 (73.68%) Retail
5 14 (73.68%) Risk Management
5 14 (73.68%) Finance
5 14 (73.68%) Visualisation
5 14 (73.68%) Apache Hive
5 14 (73.68%) SQL Server 2008
5 14 (73.68%) Scala
5 14 (73.68%) Investment Management
5 14 (73.68%) QlikView
5 14 (73.68%) T-SQL

Snowflake Schema
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:

Application Platforms
1 14 (73.68%) Apache Pig
2 1 (5.26%) Apache Spark
Applications
1 14 (73.68%) MS Excel
Database & Business Intelligence
1 19 (100.00%) Data Warehouse
1 19 (100.00%) SQL Server
2 15 (78.95%) Big Data
2 15 (78.95%) Hadoop
2 15 (78.95%) Microsoft Analysis Services
2 15 (78.95%) SQL Server Analysis Services
2 15 (78.95%) SQL Server Integration Services
3 14 (73.68%) Apache Hive
3 14 (73.68%) QlikView
3 14 (73.68%) SQL Server 2008
4 3 (15.79%) BusinessObjects
4 3 (15.79%) Oracle ODI
4 3 (15.79%) Oracle OWB
5 2 (10.53%) Star Schema
6 1 (5.26%) DataStage
6 1 (5.26%) MySQL
6 1 (5.26%) Oracle Reports
6 1 (5.26%) RDBMS
6 1 (5.26%) Relational Database
6 1 (5.26%) SQLPlus
General
1 15 (78.95%) Banking
2 14 (73.68%) Corporate Banking
2 14 (73.68%) Finance
2 14 (73.68%) Retail
2 14 (73.68%) Retail Banking
Job Titles
1 18 (94.74%) Developer
2 3 (15.79%) Architect
2 3 (15.79%) Data Architect
3 2 (10.53%) Data Warehouse Architect
3 2 (10.53%) Data Warehouse Developer
4 1 (5.26%) Analyst
4 1 (5.26%) Data Analyst
4 1 (5.26%) Data Warehouse Analyst
4 1 (5.26%) Oracle Analyst
4 1 (5.26%) Oracle Architect
4 1 (5.26%) Oracle Developer
4 1 (5.26%) SQL Developer
4 1 (5.26%) SSAS Developer
4 1 (5.26%) SSIS Developer
Miscellaneous
1 15 (78.95%) Analytical Skills
2 11 (57.89%) Management Information System
3 1 (5.26%) Data Structures
Operating Systems
1 17 (89.47%) Windows
2 3 (15.79%) Unix
2 3 (15.79%) Windows Server
Processes & Methodologies
1 18 (94.74%) Migration
2 15 (78.95%) Analytics
2 15 (78.95%) Data Analysis
3 14 (73.68%) Investment Management
3 14 (73.68%) Risk Management
3 14 (73.68%) Stakeholder Management
3 14 (73.68%) Visualisation
4 11 (57.89%) Kalman Filter
5 5 (26.32%) ETL
6 4 (21.05%) Agile Software Development
6 4 (21.05%) Change Data Capture
6 4 (21.05%) Data Migration
6 4 (21.05%) Data Modelling
6 4 (21.05%) ETL Development
7 3 (15.79%) Complex ETL
7 3 (15.79%) Inmon Methodology
7 3 (15.79%) Matrix Organization
7 3 (15.79%) Performance Tuning
7 3 (15.79%) TDD
7 3 (15.79%) Unit Testing
Programming Languages
1 19 (100.00%) SQL
2 14 (73.68%) C#
2 14 (73.68%) Scala
2 14 (73.68%) Shell Script
2 14 (73.68%) T-SQL
3 1 (5.26%) PL/SQL
3 1 (5.26%) Python
Qualifications
1 17 (89.47%) Degree
Quality Assurance & Compliance
1 3 (15.79%) Data Quality
Vendors
1 14 (73.68%) Cloudera
1 14 (73.68%) Hortonworks
1 14 (73.68%) Microsoft
2 4 (21.05%) Oracle
3 3 (15.79%) SAP
4 1 (5.26%) Cognos
4 1 (5.26%) Teradata