Add latest changes from gitlab-org/gitlab@13-1-stable-ee

1 files changed, 2 insertions, 45 deletions

diff --git a/doc/development/README.md b/doc/development/README.md
index 22cc21e12b9..d330d6d466e 100644
--- a/doc/development/README.md
+++ b/doc/development/README.md
@@ -63,7 +63,7 @@ Complementary reads:
 - [Working with Gitaly](gitaly.md)
 - [Manage feature flags](feature_flags/index.md)
 - [Licensed feature availability](licensed_feature_availability.md)
-- [View sent emails or preview mailers](emails.md)
+- [Dealing with email/mailers](emails.md)
 - [Shell commands](shell_commands.md) in the GitLab codebase
 - [`Gemfile` guidelines](gemfile.md)
 - [Pry debugging](pry_debugging.md)
@@ -113,50 +113,7 @@ Complementary reads:
 
 ## Database guides
 
-### Tooling
-
-- [Understanding EXPLAIN plans](understanding_explain_plans.md)
-- [explain.depesz.com](https://explain.depesz.com/) for visualizing the output
-  of `EXPLAIN`
-- [pgFormatter](http://sqlformat.darold.net/) a PostgreSQL SQL syntax beautifier
-
-### Migrations
-
-- [What requires downtime?](what_requires_downtime.md)
-- [SQL guidelines](sql.md) for working with SQL queries
-- [Migrations style guide](migration_style_guide.md) for creating safe SQL migrations
-- [Testing Rails migrations](testing_guide/testing_migrations_guide.md) guide
-- [Post deployment migrations](post_deployment_migrations.md)
-- [Background migrations](background_migrations.md)
-- [Swapping tables](swapping_tables.md)
-- [Deleting migrations](deleting_migrations.md)
-
-### Debugging
-
-- Tracing the source of an SQL query using query comments with [Marginalia](database_query_comments.md)
-- Tracing the source of an SQL query in Rails console using [Verbose Query Logs](https://guides.rubyonrails.org/debugging_rails_applications.html#verbose-query-logs)
-
-### Best practices
-
-- [Adding database indexes](adding_database_indexes.md)
-- [Foreign keys & associations](foreign_keys.md)
-- [Single table inheritance](single_table_inheritance.md)
-- [Polymorphic associations](polymorphic_associations.md)
-- [Serializing data](serializing_data.md)
-- [Hash indexes](hash_indexes.md)
-- [Storing SHA1 hashes as binary](sha1_as_binary.md)
-- [Iterating tables in batches](iterating_tables_in_batches.md)
-- [Insert into tables in batches](insert_into_tables_in_batches.md)
-- [Ordering table columns](ordering_table_columns.md)
-- [Verifying database capabilities](verifying_database_capabilities.md)
-- [Database Debugging and Troubleshooting](database_debugging.md)
-- [Query Count Limits](query_count_limits.md)
-- [Creating enums](creating_enums.md)
-
-### Case studies
-
-- [Database case study: Filtering by label](filtering_by_label.md)
-- [Database case study: Namespaces storage statistics](namespaces_storage_statistics.md)
+See [database guidelines](database/index.md).
 
 ## Integration guides