Transaction Control (ACID): Learn how DELETE and TRUNCATE behave in transactions, rollback support

Isolation Levels: Understand how concurrent DELETEs interact, locking behavior

Foreign Key Constraints: Deep dive into CASCADE, SET NULL, RESTRICT options

Indexing Strategies: Optimize DELETE performance with proper indexes on WHERE columns

Partitioning: Use table partitioning to drop entire partitions (faster than DELETE)

Soft Deletes: Implement UPDATE status = deleted instead of DELETE for recovery

Archiving Strategies: Design archive tables, retention policies, compliance requirements

VACUUM and Storage: Reclaim storage after large deletes, optimize table size

Write a safe DELETE with WHERE clause and transaction (test before commit)

Implement batch delete for 1 million rows with progress monitoring

Create archive-then-delete pattern with verification steps

Compare DELETE vs TRUNCATE performance on 10M row table

Implement GDPR account deletion with cascade impact check

Write query to check foreign key cascade impact before deletion

Implement soft delete pattern with deleted_at column

Create batch delete with pause between batches (prevent lock contention)

Write query to reclaim storage after large delete (VACUUM/OPTIMIZE)

Implement ETL staging table cleanup using TRUNCATE

DELETE vs TRUNCATE: Performance differences, when to use each, rollback support

Foreign key CASCADE: How it works, dangers, prevention strategies

Archive-then-delete pattern: Why important, implementation steps, benefits

Batch deletion: Why needed, optimal batch size, pause between batches

Soft delete vs hard delete: Trade-offs, when to use each, implementation

TRUNCATE restrictions: Foreign keys, WHERE clause, transaction behavior

Storage reclamation: Why needed after DELETE, VACUUM vs OPTIMIZE vs REBUILD

DELETE performance: Indexing strategies, batch size, trigger impact

GDPR compliance: Right to be forgotten implementation, cascade deletes

Production safety: Backup before delete, test on subset, verify after delete

PostgreSQL DELETE Documentation: https://www.postgresql.org/docs/current/sql-delete.html

PostgreSQL TRUNCATE Documentation: https://www.postgresql.org/docs/current/sql-truncate.html

MySQL DELETE Documentation: https://dev.mysql.com/doc/refman/8.0/en/delete.html

MySQL TRUNCATE Documentation: https://dev.mysql.com/doc/refman/8.0/en/truncate-table.html

SQL Server DELETE Documentation: https://docs.microsoft.com/en-us/sql/t-sql/statements/delete-transact-sql

Foreign Key Constraints: https://www.postgresql.org/docs/current/ddl-constraints.html#DDL-CONSTRAINTS-FK

VACUUM and Storage Management: https://www.postgresql.org/docs/current/routine-vacuuming.html

GDPR Right to be Forgotten: https://gdpr-info.eu/art-17-gdpr/

Database Archiving Strategies: Best practices for data retention and compliance

Soft Delete Pattern: Implementation guide and trade-offs