Hosting Operations
Read-onlyCount SQLite Events by Type
You need to summarize event counts by event_type in SQLite.
Command
sqlite3 app.db "SELECT event_type, count(*) FROM events GROUP BY event_type ORDER BY count(*) DESC;"Before you run this
System impact: Read-only. Low when scoped to the shown target.
When not to use it: Do not use it for long-range analytics without filtering by time when the table is large.
Expected output
Event types with counts, ordered from most common to least common.
System impact
Read-only. Nothing changes. The command groups event rows by type and counts them.
Recovery / rollback: no state is changed.
When to use it
Use when checking event mix, noisy actions, or whether one failure type dominates.
When not to use it
Do not use it for long-range analytics without filtering by time when the table is large.
Watch this command run
Command transcript
This sanitized transcript shows the commands and output shape without exposing host details.
$ sqlite3 app.db "SELECT created_at, event_type FROM events ORDER BY created_at DESC LIMIT 5;"
2026-06-25T12:10:00Z|checkout_completed
2026-06-25T12:08:00Z|login
2026-06-25T12:05:00Z|page_view$ sqlite3 app.db "SELECT event_type, count(*) FROM events GROUP BY event_type ORDER BY count(*) DESC;"
page_view|6
login|3
checkout_completed|2
error|1View commands shown
These are the commands shown in the sanitized transcript.
Commands shown
sqlite3 app.db "SELECT created_at, event_type FROM events ORDER BY created_at DESC LIMIT 5;"sqlite3 app.db "SELECT event_type, count(*) FROM events GROUP BY event_type ORDER BY count(*) DESC;"
next steps
Related commands
Show Recent SQLite Events
For small apps, the quickest timeline may be inside the SQLite file.
sqlite3 app.db "SELECT created_at, event_type FROM events ORDER BY created_at DESC LIMIT 5;"
Count Rows in Key SQLite Tables
A quick row count can reveal empty imports, runaway events, or missing data.
sqlite3 app.db "SELECT 'users', count(*) FROM users UNION ALL SELECT 'orders', count(*) FROM orders UNION ALL SELECT 'events', count(*) FROM events;"
Find Duplicate Emails in SQLite
Duplicate account data is easier to spot with one grouped query.
sqlite3 app.db "SELECT email, count(*) FROM users GROUP BY email HAVING count(*) > 1;"
List SQLite User Tables Only
System metadata tables can distract from the app tables you care about.
sqlite3 app.db "SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;"
Check SQLite Database Integrity
When a SQLite-backed app behaves strangely, first rule out file corruption.
sqlite3 app.db "PRAGMA integrity_check;"
Study mapping
Use this as independent command practice: read the notes, predict the output, then compare it with the example before using a real shell.
Useful for
- LPIC-1 style command-line practice
- LFCS style performance tasks
- Linux+ style troubleshooting review
Independent study support only. No affiliation, endorsement, exam dumps, or real exam questions.