Subqueries Courses

Structured Query Language (SQL) using SAS
SAS via Coursera

Advanced SQL Retrieval Queries in SQLiteStudio
Coursera Project Network via Coursera

SQL
Udacity

Advanced Database Queries
New York University (NYU) via edX

Data Manipulation in SQL
DataCamp

Exploratory Data Analysis in SQL
DataCamp

Microsoft SQL Server 2016: Query Data
LinkedIn Learning

Oracle Database 12c: Advanced SQL
LinkedIn Learning

Querying Microsoft SQL Server 2012
LinkedIn Learning

Querying Microsoft SQL Server 2019
LinkedIn Learning