Looker
Looker (now part of Google Cloud) is the enterprise-grade business intelligence platform known for its unique semantic layer approach — the LookML data modelling language lets data teams define metrics once and consistently serve them across all dashboards, reports, and data products. It's the gold standard for data teams that want a single source of truth for business metrics.
What is Looker?
Looker's architecture has three layers: the database (connected via JDBC), LookML models (semantic layer defining dimensions, measures, and joins), and the Looker UI (Explores, Dashboards, Looks). LookML enables data engineers to define business logic once, ensuring a 'revenue' metric means the same thing everywhere. Looker also provides an API for embedding analytics, Looker Blocks (pre-built LookML models), and Looker Studio integration.
Why Looker matters for your career
In companies with multiple data consumers (product, sales, marketing, finance) and complex metric definitions, Looker's semantic layer prevents the 'metric proliferation' problem where each team calculates KPIs differently. Analytics engineers who can build and maintain Looker models create enormous organisational data consistency.
Career paths using Looker
Looker skills are sought for Analytics Engineer, Data Analyst, BI Engineer, and Data Platform Engineer roles at mid-to-large companies using Looker for their analytics infrastructure. Google Cloud Looker certification is increasingly recognised.
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Frequently asked questions
What is LookML?▼
LookML is Looker's proprietary data modelling language for defining dimensions, measures, and relationships between data tables. It lives in version-controlled files (similar to dbt models) and compiles to SQL. Writing good LookML is the core skill differentiating Looker power users from casual dashboard builders.
Looker vs. Tableau vs. Power BI — which should I learn?▼
Learn based on the company stack you're targeting. Looker is dominant at data-mature tech companies on Google Cloud or Snowflake. Tableau is widely used in data science and analytics-heavy environments. Power BI is standard in Microsoft-ecosystem enterprises.
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