Design and implement database indexing strategies. Use when creating indexes, choosing index types, or optimizing index performance in PostgreSQL and MySQL.
Design comprehensive indexing strategies to improve query performance, reduce lock contention, and maintain data integrity. Covers index types, design patterns, and maintenance procedures.
B-tree Indexes (Default):
-- Standard equality and range queries
CREATE INDEX idx_users_email ON users(email);
CREATE INDEX idx_orders_created_at ON orders(created_at DESC);
-- Composite indexes for multi-column queries
CREATE INDEX idx_orders_user_status
ON orders(user_id, status)
WHERE cancelled_at IS NULL;
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| PostgreSQL Index Types | PostgreSQL Index Types |
| MySQL Index Types | MySQL Index Types |
| Single Column Indexes | Single Column Indexes, Composite Indexes, Partial/Filtered Indexes, Expression Indexes |