Tag

data base

KajoData articles about data base. Practical knowledge about data analysis, tools and careers.

Articles: 2

SQL

SQL basics: from your first table to a result you can explain

A query can run successfully and answer the wrong question. I work through six orders to show how selection, grouping, missing values and result checks fit together.

16 Jul 202412 min read

Career & business

SQL for data analysts: from question to verified result

A query can run successfully and still answer the wrong question. Work through order grain, joins, missing amounts and a reproducible reconciliation.

24 Jun 202413 min read