mysql删除用户错误怎么办

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1、错误提示

ERROR 1558 (HY000): Column count of mysql.user is wrong. Expected 43, found 42. Created with MySQL 50560, now running 50645. Please use mysql_upgrade to fix this error.

意思是数据库以前做过升级但是数据库里的mysql库没有升级导致的权限混乱
2、解决办法
升级数据库使用命令
mysql_upgrade -uroot -p ‘密码’

Enter password:
Looking for 'mysql' as: mysql
Looking for 'mysqlcheck' as: mysqlcheck
Running 'mysqlcheck with default connection arguments
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck with default connection arguments
Warning: Using a password on the command line interface can be insecure.
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.event                                        OK
mysql.func                                         OK
mysql.general_log                                  OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.host                                         OK
mysql.ndb_binlog_index                             OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.proxies_priv                                 OK
mysql.servers                                      OK
mysql.slow_log                                     OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.user                                         OK
Running 'mysql_fix_privilege_tables'...
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck with default connection arguments
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck with default connection arguments
Warning: Using a password on the command line interface can be insecure.
mysqlcheck: Got error: 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.2_b_cloud_provider  FOR UPGRADE' at line 1 when executing 'CHECK TABLE ...  FOR UPGRADE'
cb-fetch-data-pre.cron_task                        OK
cb-fetch-data-pre.cron_task_result                 OK
cb-fetch-data-pre.xxl_job_qrtz_blob_triggers       OK
cb-fetch-data-pre.xxl_job_qrtz_calendars           OK
cb-fetch-data-pre.xxl_job_qrtz_cron_triggers       OK
cb-fetch-data-pre.xxl_job_qrtz_fired_triggers      OK
cb-fetch-data-pre.xxl_job_qrtz_job_details         OK
cb-fetch-data-pre.xxl_job_qrtz_locks               OK
cb-fetch-data-pre.xxl_job_qrtz_paused_trigger_grps OK
cb-fetch-data-pre.xxl_job_qrtz_scheduler_state     OK
cb-fetch-data-pre.xxl_job_qrtz_simple_triggers     OK
cb-fetch-data-pre.xxl_job_qrtz_simprop_triggers    OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_group       OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_info        OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_log         OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_logglue     OK
cb-fetch-data-pre.xxl_job_qrtz_trigger_registry    OK
cb-fetch-data-pre.xxl_job_qrtz_triggers            OK
cloudbest-index-point-pre.b_cloud_provider         OK
cloudbest-index-point-pre.cron_task                OK
cloudbest-index-point-pre.cron_task_result_2019_09 OK
cloudbest-index-point-pre.cron_task_result_2019_10 OK
cloudbest-index-point-pre.cron_task_result_2019_11 OK
cloudbest-index-point-pre.cron_task_result_2019_12 OK
cloudbest-index-point-pre.cron_task_result_2020_01 OK
cloudbest-index-point-pre.cron_task_result_2020_02 OK
cloudbest-index-point-pre.cron_task_result_2020_03 OK
cloudbest-index-point-pre.cron_task_result_2020_04 OK
cloudbest-index-point-pre.cron_task_result_2020_05 OK
cloudbest-index-point-pre.cron_task_result_2020_06 OK
cloudbest-index-point-pre.cron_task_result_2020_07 OK
cloudbest-index-point-pre.cron_task_result_2020_08 OK
cloudbest-index-point-pre.cron_task_result_2020_09 OK
cloudbest-index-point-pre.i_index_rank             OK
cloudbest-index-point-pre.i_instances              OK
cloudbest-index-point-pre.i_model                  OK
cloudbest-index-point-pre.i_model_price            OK
cloudbest-index-point-pre.i_performance_reportes   OK
cloudbest-index-point-pre.i_region                 OK
cloudbest-index-point-pre.statistic_index          OK
cloudbest-market.ddos_accounts                     OK
cloudbest-market.ddos_custom                       OK
cloudbest-market.ddos_shield_info                  OK
cloudbest-market.ddos_task_queue                   OK
cloudbest-order.cb_order                           OK
FATAL ERROR: Error during call to mysql_check for upgrading the tables names on all db(s) except mysql

最后一个错误是因为其他的数据库表没法更改，这个不会影响。 到这算是解决上面的错误。权限可以正常使用了

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