diff --git a/docs/2022-07-31-sql.html b/docs/2022-07-31-sql.html
index 67fe82b..3ea8c7e 100644
--- a/docs/2022-07-31-sql.html
+++ b/docs/2022-07-31-sql.html
@@ -240,6 +240,16 @@
>
+
+ Heathcheck
+
+ Use SELECT 1
to check if database failed yet.
How to read MySQL EXPLAINs
+
+ Honest health checks that hit the database
+
diff --git a/posts/2022-07-31-sql.md b/posts/2022-07-31-sql.md
index efe70ea..c80525b 100644
--- a/posts/2022-07-31-sql.md
+++ b/posts/2022-07-31-sql.md
@@ -110,6 +110,10 @@ database running the same time update it, for example create index, ...)
- [For MySQL 8.0](https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-operations.html),
[Limitations](https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-limitations.html)
+## Heathcheck
+
+Use `SELECT 1` to check if database failed yet.
+
## Tools
- Use [sqlfluff/sqlfluff](https://github.com/sqlfluff/sqlfluff) to check your
@@ -125,3 +129,4 @@ database running the same time update it, for example create index, ...)
- [When to use JSON data type in database schema design?](https://shekhargulati.com/2022/01/08/when-to-use-json-data-type-in-database-schema-design/)
- [My Notes on GitLab Postgres Schema Design](https://shekhargulati.com/2022/07/08/my-notes-on-gitlabs-postgres-schema-design/)
- [How to read MySQL EXPLAINs](https://planetscale.com/blog/how-read-mysql-explains)
+- [Honest health checks that hit the database](https://brandur.org/fragments/database-health-check)