new queroes

.vitepress/sidebar.js

@@ -175,7 +175,7 @@ export const sidebar = [
         "link": "/databases/postgres-internals-data-organisation"
       },
       {
-        "text": "Postgres Tips & Tricks",
+        "text": "Postgres Tips & Tricks - Megalist of Secret SQL Queries",
         "link": "/databases/postgres-tips-megalist"
       },
       {

README.md

@@ -179,7 +179,7 @@
 <li><a target="_blank" href="https://github.com/Bhupesh-V/til/blob/master/databases/inserting-null-everywhere.md">Inserting NULL wherever possible on Postgres</a></li>
 <li><a target="_blank" href="https://github.com/Bhupesh-V/til/blob/master/databases/list-all-values-for-custom-enum-postgres.md">List all values of a custom enum in Postgres</a></li>
 <li><a target="_blank" href="https://github.com/Bhupesh-V/til/blob/master/databases/postgres-internals-data-organisation.md">Postgres 14 Internals: Data Organisation</a></li>
-<li><a target="_blank" href="https://github.com/Bhupesh-V/til/blob/master/databases/postgres-tips-megalist.md">Postgres Tips & Tricks</a></li>
+<li><a target="_blank" href="https://github.com/Bhupesh-V/til/blob/master/databases/postgres-tips-megalist.md">Postgres Tips & Tricks - Megalist of Secret SQL Queries</a></li>
 <li><a target="_blank" href="https://github.com/Bhupesh-V/til/blob/master/databases/sqlite-space-optimization-with-rowd-id.md">SQLite db optimization with ROWID</a></li>
 <li><a target="_blank" href="https://github.com/Bhupesh-V/til/blob/master/databases/slowly-changing-dimensions.md">Slowly Changing Dimensions (SCD)</a></li>
 <li><a target="_blank" href="https://github.com/Bhupesh-V/til/blob/master/databases/oath-for-3-normal-forms.md">The 3NF Oath ✋🏼</a></li>

databases/postgres-tips-megalist.md

@@ -1,5 +1,10 @@
-# Postgres Tips & Tricks
+<!-- omit from toc -->
+# Postgres Tips & Tricks - Megalist of Secret SQL Queries
 
+- [List all table indexes](#list-all-table-indexes)
+- [List all column types across the schema](#list-all-column-types-across-the-schema)
+- [List history of sequential \& index scans across all tables](#list-history-of-sequential--index-scans-across-all-tables)
+- [Show table size](#show-table-size)
 
 ## List all table indexes
 
@@ -16,12 +21,6 @@ where c.relname = 'TABLE_NAME'
 
 ```
 
-List all indexes for a table
-
-```sql
-select * from pg_indexes where tablename = 'TABLE_NAME'
-```
-
 ## List all column types across the schema
 
 ```sql
@@ -34,3 +33,24 @@ JOIN pg_namespace n ON t.typnamespace = n.oid
 WHERE n.nspname NOT IN ('pg_catalog', 'information_schema')
   AND t.typtype IN ('e', 'c'); -- 'e' for ENUM, 'c' for composite types
 ```
+
+## List history of sequential & index scans across all tables
+
+```sql
+SELECT
+    relname AS table_name,
+    seq_scan,
+    last_seq_scan,
+    idx_scan,
+    last_idx_scan,
+    seq_scan + idx_scan AS total_accesses
+FROM pg_stat_all_tables
+WHERE schemaname = 'public'
+ORDER BY total_accesses DESC;
+```
+
+## Show table size
+
+```sql
+SELECT pg_size_pretty(pg_relation_size('table'));
+```

index.md

@@ -82,7 +82,7 @@
 <td><a href="https://til.bhupesh.me/management/the-art-and-science-mess-management">The art and science of mess management</a></td>
 </tr>
 <tr>
-<td><a href="https://til.bhupesh.me/databases/postgres-tips-megalist">Postgres Tips & Tricks</a></td>
+<td><a href="https://til.bhupesh.me/databases/postgres-tips-megalist">Postgres Tips & Tricks - Megalist of Secret SQL Queries</a></td>
 </tr>
 <tr>
 <td><a href="https://til.bhupesh.me/psychology/eustress">Eustress: The Good Stress</a></td>
@@ -204,7 +204,7 @@
 <li><a href="/databases/inserting-null-everywhere">Inserting NULL wherever possible on Postgres</a></li>
 <li><a href="/databases/list-all-values-for-custom-enum-postgres">List all values of a custom enum in Postgres</a></li>
 <li><a href="/databases/postgres-internals-data-organisation">Postgres 14 Internals: Data Organisation</a></li>
-<li><a href="/databases/postgres-tips-megalist">Postgres Tips & Tricks</a></li>
+<li><a href="/databases/postgres-tips-megalist">Postgres Tips & Tricks - Megalist of Secret SQL Queries</a></li>
 <li><a href="/databases/sqlite-space-optimization-with-rowd-id">SQLite db optimization with ROWID</a></li>
 <li><a href="/databases/slowly-changing-dimensions">Slowly Changing Dimensions (SCD)</a></li>
 <li><a href="/databases/oath-for-3-normal-forms">The 3NF Oath ✋🏼</a></li>

recent_tils.json

@@ -20,7 +20,7 @@
   "url": "https://til.bhupesh.me/management/the-art-and-science-mess-management"
  },
  {
-  "title": "Postgres Tips & Tricks",
+  "title": "Postgres Tips & Tricks - Megalist of Secret SQL Queries",
   "url": "https://til.bhupesh.me/databases/postgres-tips-megalist"
  },
  {