Skip to content

1 or 2 credits, some free · 1 credit is about $1

pocketshelf

School Records SQL: Performance Queries

12 copy-ready SQL snippets for indexing and query speed on a school records database. 2 pages.

ForDevelopers

sql-performance-queries-for-school-records.pdfShowing 15 of 59 lines
// Read the query plan
EXPLAIN (ANALYZE, BUFFERS)
SELECT * FROM enrollments
WHERE student_id = 42 AND status = 'active';

// Index the foreign key
CREATE INDEX CONCURRENTLY enrollments_student_id_idx
  ON enrollments (student_id);

// Composite index
CREATE INDEX CONCURRENTLY enrollments_student_id_enrolled_at_idx
  ON enrollments (student_id, enrolled_at DESC);

// Partial index
CREATE INDEX CONCURRENTLY enrollments_active_idx

What's inside

Format
PDF, Markdown, SQL
Contents
12 queries
Version
1.0 · Updated 3 Oct 2026
Licence
Commercial What this means
Checked
Checked before it ships
  • sql-performance-queries-for-school-records.pdfPDF · 21 KB
  • sql-performance-queries-for-school-records.mdMarkdown · 2 KB
  • sql-performance-queries-for-school-records.sqlSQL · 2 KB
  • LICENSE.txtadded to every download

About this item

A compact, printable snippet pack for indexing and query performance snippets for a school records database (students and enrollments). Each of the 12 entries has a one-line explanation and a small example you can paste into your editor. The PDF uses a two-column A4 layout designed to sit next to your keyboard, and the same content ships as Markdown so you can search it or drop it into your notes, plus a .sql file with every query. Every SQL example targets PostgreSQL 16.

Reviews

No reviews yet.

You might also grab