Databases
Relational foundations and SQL dialects compared side by side.
12 PUBLISHED LESSONS
SQL lab: circuit inventory to activation handoff
Twelve small exercises using one circuit inventory. Find missing records, count readiness, and rehearse changes.
Start learning →3 PUBLISHED LESSONSOracle: SQL*Plus, views & RMAN
Learn the difference between querying data and operating the database that stores it.
Start learning →4 PUBLISHED LESSONSSQL Server administration
Inspect instances, database state, permissions, and the backup chain.
Start learning →5 PUBLISHED LESSONSSQL across dialects
Learn relational thinking once, then compare the syntax each database actually accepts.
Start learning →All learning paths and update notes →
What you’ll learn
- SQL foundations and dialect comparisons
- Schema design, queries, indexes, and transactions
- Backup, recovery, and database operations