No loop queries

Single aggregate query

No correlated subquery

No SELECT *

JOIN-based aggregation

Filter before aggregation

Correct aggregation

CTE or subquery clarity

Notes explain N+1

Notes explain fix

GIN full-text index

GIN JSONB index

Expression index for email

Partial index for published status

Composite index column order

Cursor pagination index

Cursor-based query provided

No leading wildcard LIKE

Index type rationale

Selective indexing awareness

pg_stat_statements query

Missing index detection

Unused index detection

Materialized view creation

Concurrent materialized refresh

Batch UPDATE not loop

Temp table for large batch

pg_class approximate count

VACUUM ANALYZE maintenance

Materialized view index

Full EXPLAIN flags

Seq Scan as slow signal

Index Only Scan as best

Join method discussion

Cost field interpretation

Actual time interpretation

Rows estimate vs actual

Expression index recommendation

JOIN aggregation recommendation

Cursor pagination recommendation

PARTITION BY RANGE syntax

Partition OF syntax

Four Q1-Q4 partitions

Single batch INSERT

No SELECT * in inserts

Batch UPDATE with IN clause

No per-row update loop

Partition pruning explanation

COPY mention for large data

Fix implicit type conversion

Index for account_number

OR condition diagnosis

OR rewritten with UNION

Explicit JOIN syntax

Covering index for fraud query

Composite index column order for Query 4

Index for billing aggregation

Type conversion explanation

No SELECT * in rewrites