Summary of Reddit Comments on Mysql Indexing

Proper Indexing for MySQL query

The recommended index for the provided MySQL query ([created_at](https://www.amazon.com/Create-At-Home-Old-New/dp/1784728551/ref=sr_1_1?dib=eyJ2IjoiMSJ9.1G1Bd1z2St-HxrWM-uAheR40GX8-Pg-WmooVTpondTmujp98DzdR3f_SPafb5-Ov5GGYTKC1Ribl5ORKrfmEDQRGydGr2IaDNghtkSUpMRbu8dwxtH9b6OrOjpN_gmq3eb26Kzk-chgGUYRgOWA1WXvyC-_5cFlCTf4iackR6PpblwN4fDopSYMcM2s7rL65Bid5dvHWrpY-p7Ub1rzh_TLiz4v4oWRkXoQVHP7h7N0z3ubGZQwaHmz2-NpmYSIItxbr3a8i5KVvvsg7laMLswEmSGnUZGE-ujsvbWdCpbU._FOPLwqATNtOrQkdpXTRcP0fh7C0axwPkEjvw5JN_7U&dib_tag=se&keywords=created_at&qid=1754379682&sr=8-1&tag=redditrevie08-20), [created_by](https://www.amazon.com/Create-Creatine-Monohydrate-Endurance-Gluten-Free/dp/B0F55PDR4C/ref=sr_1_1?dib=eyJ2IjoiMSJ9.I1qFM6TuCW5Py-3OSd16EBH4_2afZfDZDSfqKkIK45tupa-6PY9rj05mo5wyIgB-RXEB0vbeDfNStN6DJZnxpurT4rnpmCmF_ll3IjpKQES4o-kWn6UqDp_42Y729UlFtW-OfFiVmRZw8wMyDnUzrYSrQ6QTsEdBJV5HCdhAW30eYyl3pQO_QG374ohJJbSLNcq44Q6dPCvCl1DBxCg5oz8sAJWw_-HuDlb6aKhv1icgB-gXTCM02eO6I6oFbNuFeoTNDR5Vc_VWS36nrj-7L2qzVEGUbtjP45k09io4Ww4.IqriNlQGcuhkIejZ3eN3_nCNA8nwQszpnDEMVijSE9g&dib_tag=se&keywords=created_by&qid=1754379682&sr=8-1&tag=redditrevie08-20)).
The index should be sorted for efficient range scan access.
Advice to avoid using [BETWEEN](https://www.amazon.com/Between-Two-Ferns/dp/B01N0H7ADG/ref=sr_1_1?dib=eyJ2IjoiMSJ9.EZpOEr6umEAtRdY1cxHoiKrRrUE6ZexmoVg0yOjf0Hy9sWjbWHnCu3izDGbaFZOTiYTAPA3wEvgYKOlCSCMF6gfxtkQkjjiSF6D4pK4-gks6YhSRb7Q9_xOsBBxibK73rH5Z4vgFaY0S71O4wrjqX-a1fnx9Y3zc4UOwprXmrJv85VWBQz0jBrxCsol6kTDs_etHsDrvbOHYHUl27ngUG7J4TtM2q-7KOW00m8N5Wng.MD9LdsIGIyl0bXMoEAyWMHfLuidu70Q-chnG0iU4KVw&dib_tag=se&keywords=BETWEEN&qid=1754379682&sr=8-1&tag=redditrevie08-20) for dates and times.
Suggested e-book by Markus Winand for indexing knowledge.

Is Indexing Necessary for Small Tables

Index speedup may be negligible for small tables.
Index statistics can help query optimization.
Indexing is essential for InnoDB due to primary key requirements.
Index need depends on query execution speed and table size.

Factors to Consider for Indexing

Using [EXPLAIN SELECT](https://www.amazon.com/City-Gold-Jonathan/dp/B01L64699E/ref=sr_1_1?dib=eyJ2IjoiMSJ9.V5B2bugsDChQ53juE-OrjxZsx1zrFqrm3tekWVG0NAiuSNuvYOG17pl1M08sONKPxoUJhgO33bsjLA4Oydn4qA.jL-9PrQ__8IA0U5QG_wg6SB5GU59PTm6DwLya62q5lU&dib_tag=se&keywords=EXPLAIN+SELECT&qid=1754379682&sr=8-1&tag=redditrevie08-20) to determine if index is necessary.
Be cautious of adding too many indexes due to performance impact.
Check query execution time for optimization needs.

Resume Critique Discussion

Varied opinions on resume content & length across recruiters.
Challenges in job market for candidates with limited experience.
Recommendations for improving resume content and layout.
Suggestions to target specific job roles and simplify resume.

Job Search Tips and Advice

Utilize personal networks and connections for job opportunities.
Consider moving into adjacent fields if struggling to find tech jobs.
Simplify and make resume visually appealing for better impact.
Explore options in related fields or leverage personal contacts for job opportunities.