How to check database connection using wpcli

wpcli wp db check

Or, with docker-compose, if you have a wpcli container:

docker-compose exec wpcli wp db check

Example output:

wordpress.wp_commentmeta                           OK
wordpress.wp_comments                              OK
wordpress.wp_icl_content_status                    OK
wordpress.wp_icl_core_status                       OK
wordpress.wp_icl_flags                             OK
wordpress.wp_icl_languages                         OK
wordpress.wp_icl_languages_translations            OK
wordpress.wp_icl_locale_map                        OK
wordpress.wp_icl_message_status                    OK
wordpress.wp_icl_mo_files_domains                  OK
wordpress.wp_icl_node                              OK
wordpress.wp_icl_reminders                         OK
wordpress.wp_icl_string_batches                    OK
wordpress.wp_icl_string_packages                   OK
wordpress.wp_icl_string_pages                      OK
wordpress.wp_icl_string_positions                  OK
wordpress.wp_icl_string_status                     OK
wordpress.wp_icl_string_translations               OK
wordpress.wp_icl_string_urls                       OK
wordpress.wp_icl_strings                           OK
Success: Database checked.