Mysql ERROR 1040 (HY000): Too many connections解决_MySQL
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Mysql ERROR 1040 (HY000): Too many connections解决
1、问题描述：连接数据库出现Too Many Connections 错误，
2、问题定位步骤：
1、mysql -u root -p 进入不了，同样出现上述错误。
2、修改/etc/mysql/my.cnf（ubuntu系统，其他系统在/etc/my.cnf
[mysqld]
port=3306
#socket=MySQL
skip-locking
set-variable = key_buffer=16K
set-variable = max_allowed_packet=1M
set-variable = thread_stack=64K
set-variable = table_cache=4
set-variable = sort_buffer=64K
set-variable = net_buffer_length=2K
set-variable = max_connections=1000
3、重启mysql /etc/init.d/mysql restart
搞定了。
4、还有一个方法就是直接 /etc/init.d/mysql restart 在做连接操作，呵呵，这个不好。
续：
再次mysql -u root -p 进入系统 ，如下，大部分的连接其实已经Sleep了，那么如何控制释放这些空闲连接，
mysql的默认连接上只有100，也就是说连接数据超过100 就会有可能出现 Too Many Connections
修改my.cnf配置文件添加并需要重启：
[mysqld]
wait_timeout = 600
interactive_timeout = 600
上面的意思是设置10分钟内该连接没有请求就断开，当然你也可以通过kill掉下面的process的。命令是 kill ${id} 比如下面的19684 进程 kill 19684。
[sql]
mysql> show full processlist;
+-------+----------------------+-----------------------------+------+---------+------+-------+-----------------------+
| Id | User | Host | db | Command | Time | State | Info |
+-------+----------------------+-----------------------------+------+---------+------+-------+-----------------------+
| 19684 | root | AY130121082434a.local:59618 | fo | Sleep | 7028 | | NULL |
| 19691 | root | AY130121082434a.local:59888 | mo | Sleep | 6121 | | NULL |
| 19709 | root | AY130121082434a.local:60339 | fo | Sleep | 7272 | | NULL |
| 19708 | root | AY130121082434a.local:60338 | fo | Sleep | 6672 | | NULL |
| 19710 | root | 222.95.56.226:4883 | fo | Sleep | 7263 | | NULL |
| 19711 | root | 222.95.56.226:4884 | fo | Sleep | 7263 | | NULL |
| 19712 | root | 222.95.56.226:4885 | fo | Sleep | 7264 | | NULL |
| 19713 | root | 222.95.56.226:4886 | fo | Sleep | 7264 | | NULL |
| 19714 | root | 222.95.56.226:4887 | fo | Sleep | 7265 | | NULL |
| 19715 | root | 222.95.56.226:4888 | fo | Sleep | 7261 | | NULL |
| 19716 | root | 222.95.56.226:4889 | fo | Sleep | 7256 | | NULL |
| 19717 | root | 222.95.56.226:4891 | fo | Sleep | 7250 | | NULL |
| 19718 | root | 222.95.56.226:4899 | fo | Sleep | 7246 | | NULL |
| 19719 | root | 222.95.56.226:4900 | fo | Sleep | 3669 | | NULL |
| 19720 | root | 222.95.56.226:4901 | fo | Sleep | 3035 | | NULL |
| 19721 | root | 222.95.56.226:4904 | fo | Sleep | 7231 | | NULL |
| 19722 | root | 222.95.56.226:4909 | fo | Sleep | 7226 | | NULL |
| 19723 | root | 222.95.56.226:4910 | fo | Sleep | 7221 | | NULL |
| 19724 | root | 222.95.56.226:4912 | fo | Sleep | 7216 | | NULL |
| 19725 | root | 222.95.56.226:4913 | fo | Sleep | 7211 | | NULL |
| 19726 | root | 222.95.56.226:4914 | fo | Sleep | 7206 | | NULL |
| 19727 | root | 222.95.56.226:4915 | fo | Sleep | 7200 | | NULL |
| 19728 | root | 222.95.56.226:4916 | fo | Sleep | 3034 | | NULL |
| 19729 | root | 222.95.56.226:4918 | fo | Sleep | 3115 | | NULL |
| 19730 | root | AY130121082434a.local:60622 | mo | Sleep | 6121 | | NULL |
| 19731 | root | AY130121082434a.local:60623 | fo | Sleep | 6672 | | NULL |
| 19732 | root | AY130121082434a.local:60692 | fo | Sleep | 6547 | | NULL |
| 19733 | root | AY130121082434a.local:60693 | fo | Sleep | 6547 | | NULL |
| 19734 | root | AY130121082434a.local:60694 | fo | Sleep | 6305 | | NULL |
| 19735 | root | AY130121082434a.local:60695 | fo | Sleep | 6547 | | NULL |
| 19736 | root | AY130121082434a.local:60791 | mo | Sleep | 5713 | | NULL |
| 19737 | root | AY130121082434a.local:60792 | mo | Sleep | 5713 | | NULL |
| 19738 | root | AY130121082434a.local:60793 | fo | Sleep | 5823 | | NULL |
| 19739 | root | AY130121082434a.local:60794 | fo | Sleep | 5823 | | NULL |
| 19756 | root | AY130121082434a.local:60875 | mo | Sleep | 5249 | | NULL |
| 19755 | root | AY130121082434a.local:60874 | mo | Sleep | 5249 | | NULL |
| 19758 | root | AY130121082434a.local:60877 | fo | Sleep | 5342 | | NULL |
| 19757 | root | AY130121082434a.local:60876 | fo | Sleep | 5647 | | NULL |
| 19759 | root | AY130121082434a.local:60878 | fo | Sleep | 5342 | | NULL |
| 19771 | root | AY130121082434a.local:60923 | mo | Sleep | 4767 | | NULL |
| 19772 | root | AY130121082434a.local:60924 | mo | Sleep | 4767 | | NULL |
| 19773 | root | AY130121082434a.local:60926 | fo | Sleep | 3897 | | NULL |
| 19774 | root | AY130121082434a.local:60927 | fo | Sleep | 3175 | | NULL |
| 19775 | root | AY130121082434a.local:60998 | mo | Sleep | 4454 | | NULL |
| 19776 | root | AY130121082434a.local:60999 | mo | Sleep | 4454 | | NULL |
| 19777 | root | AY130121082434a.local:32913 | mo | Sleep | 4307 | | NULL |
| 19778 | root | AY130121082434a.local:32914 | mo | Sleep | 4307 | | NULL |
| 19779 | root | AY130121082434a.local:32915 | mo | Sleep | 4307 | | NULL |
| 19780 | root | AY130121082434a.local:32916 | mo | Sleep | 3387 | | NULL |
| 19781 | root | AY130121082434a.local:32957 | mo | Sleep | 1365 | | NULL |
| 19782 | root | AY130121082434a.local:32959 | moco | Sleep | 3840 | | NULL |
| 19783 | root | AY130121082434a.local:32958 | moco | Sleep | 3840 | | NULL |
| 19784 | root | AY130121082434a.local:32961 | moco | Sleep | 3840 | | NULL |
| 19785 | root | AY130121082434a.local:32962 | moco | Sleep | 3840 | | NULL |
| 19786 | root | AY130121082434a.local:32963 | moco | Sleep | 3840 | | NULL |
| 19787 | root | AY130121082434a.local:32964 | moco | Sleep | 3840 | | NULL |
| 19788 | root | AY130121082434a.local:32965 | moco | Sleep | 3840 | | NULL |
| 19789 | root | AY130121082434a.local:32966 | moco | Sleep | 3840 | | NULL |
| 19790 | root | AY130121082434a.local:32967 | moco | Sleep | 3840 | | NULL |
| 19791 | root | AY130121082434a.local:32968 | moco | Sleep | 3840 | | NULL |
| 19792 | root | AY130121082434a.local:32969 | moco | Sleep | 3839 | | NULL |
| 19793 | root | AY130121082434a.local:32970 | moco | Sleep | 3839 | | NULL |
| 19794 | root | AY130121082434a.local:32971 | moco | Sleep | 3839 | | NULL |
| 19795 | root | AY130121082434a.local:32972 | moco | Sleep | 3839 | | NULL |
| 19796 | root | AY130121082434a.local:32973 | moco | Sleep | 3839 | | NULL |
| 19797 | root | AY130121082434a.local:32974 | moco | Sleep | 3839 | | NULL |
| 19798 | root | AY130121082434a.local:32975 | moco | Sleep | 3839 | | NULL |
| 19799 | root | AY130121082434a.local:32976 | moco | Sleep | 3839 | | NULL |
| 19800 | root | AY130121082434a.local:32977 | moco | Sleep | 3839 | | NULL |
| 19801 | root | AY130121082434a.local:33110 | mo | Sleep | 1365 | | NULL |
| 19803 | root | AY130121082434a.local:33112 | fo | Sleep | 1363 | | NULL |
| 19802 | root | AY130121082434a.local:33111 | fo | Sleep | 1390 | | NULL |
| 19804 | root | AY130121082434a.local:33113 | fo | Sleep | 343 | | NULL |
| 19805 | root | 222.95.56.226:8148 | fo | Sleep | 2910 | | NULL |
| 19806 | root | 222.95.56.226:8147 | fo | Sleep | 2911 | | NULL |
| 19807 | root | 222.95.56.226:8149 | fo | Sleep | 2910 | | NULL |
| 19808 | root | 222.95.56.226:8150 | fo | Sleep | 2905 | | NULL |
| 19809 | root | 222.95.56.226:8151 | fo | Sleep | 2901 | | NULL |
| 19810 | root | 222.95.56.226:8153 | fo | Sleep | 2896 | | NULL |
| 19811 | root | 222.95.56.226:8154 | fo | Sleep | 2891 | | NULL |
| 19812 | root | 222.95.56.226:8155 | fo | Sleep | 2886 | | NULL |
| 19813 | root | 222.95.56.226:8156 | fo | Sleep | 2881 | | NULL |
| 19814 | root | 222.95.56.226:8159 | fo | Sleep | 2876 | | NULL |
| 19815 | root | 222.95.56.226:8160 | fo | Sleep | 2870 | | NULL |
| 19816 | root | 222.95.56.226:8161 | fo | Sleep | 2848 | | NULL |
| 19817 | root | 222.95.56.226:8162 | fo | Sleep | 2848 | | NULL |
| 19818 | root | 222.95.56.226:8163 | fo | Sleep | 2849 | | NULL |
| 19819 | root | 222.95.56.226:8164 | fo | Sleep | 2849 | | NULL |
| 19820 | root | 222.95.56.226:8167 | fo | Sleep | 2846 | | NULL |
| 19821 | root | 222.95.56.226:8168 | fo | Sleep | 2468 | | NULL |
| 19822 | root | 222.95.56.226:8169 | fo | Sleep | 2836 | | NULL |
| 19823 | root | 222.95.56.226:8173 | fo | Sleep | 2468 | | NULL |
| 19824 | root | 222.95.56.226:8174 | fo | Sleep | 2469 | | NULL |
| 19825 | root | AY130121082434a.local:33342 | moco | Sleep | 2570 | | NULL |
| 19826 | root | AY130121082434a.local:33527 | moco | Sleep | 2490 | | NULL |
| 19827 | root | 222.95.56.226:8417 | fo | Sleep | 1266 | | NULL |
| 19828 | root | 222.95.56.226:8416 | fo | Sleep | 1266 | | NULL |
| 19829 | root | 222.95.56.226:8415 | fo | Sleep | 1263 | | NULL |
| 19830 | root | 222.95.56.226:8418 | fo | Sleep | 1258 | | NULL |
| 19831 | root | 222.95.56.226:8421 | fo | Sleep | 1253 | | NULL |
| 19839 | root | AY130121082434a.local:33955 | moco | Sleep | 1220 | | NULL |
| 19841 | root | AY130121082434a.local:33957 | moco | Sleep | 1220 | | NULL |
| 19840 | root | AY130121082434a.local:33956 | moco | Sleep | 1220 | | NULL |
| 19842 | root | 222.95.56.226:8439 | fo | Sleep | 1141 | | NULL |
| 19844 | root | 222.95.56.226:8440 | fo | Sleep | 1142 | | NULL |
| 19843 | root | 222.95.56.226:8441 | fo | Sleep | 1143 | | NULL |
| 19845 | root | 222.95.56.226:8442 | fo | Sleep | 1143 | | NULL |
| 19846 | root | 222.95.56.226:8443 | fo | Sleep | 1144 | | NULL |
| 19847 | root | 222.95.56.226:8451 | fo | Sleep | 1144 | | NULL |
| 19849 | root | 222.95.56.226:8452 | fo | Sleep | 1144 | | NULL |
| 19851 | root | 222.95.56.226:8453 | fo | Sleep | 1143 | | NULL |
| 19853 | root | AY130121082434a.local:33981 | mo | Sleep | 1157 | | NULL |
| 19852 | root | AY130121082434a.local:33980 | mo | Sleep | 1157 | | NULL |
| 19854 | root | AY130121082434a.local:33982 | mo | Sleep | 1157 | | NULL |
| 19856 | root | 222.95.56.226:8455 | fo | Sleep | 1112 | | NULL |
| 19857 | root | AY130121082434a.local:33983 | fo | Sleep | 343 | | NULL |
| 19858 | root | 222.95.56.226:8462 | fo | Sleep | 1112 | | NULL |
| 19859 | root | 222.95.56.226:8463 | fo | Sleep | 1113 | | NULL |
| 19860 | root | 222.95.56.226:8464 | fo | Sleep | 1113 | | NULL |
| 19861 | root | 222.95.56.226:8466 | fo | Sleep | 1113 | | NULL |
| 19869 | root | 222.95.56.226:8491 | fo | Sleep | 1052 | | NULL |
| 19868 | root | 222.95.56.226:8492 | fo | Sleep | 1047 | | NULL |
| 19870 | root | 222.95.56.226:8490 | fo | Sleep | 1042 | | NULL |
| 19871 | root | 222.95.56.226:8493 | fo | Sleep | 1037 | | NULL |
| 19872 | root | 222.95.56.226:8494 | fo | Sleep | 1032 | | NULL |
| 19873 | root | 222.95.56.226:8495 | fo | Sleep | 1027 | | NULL |
| 19874 | root | 222.95.56.226:8496 | fo | Sleep | 1022 | | NULL |
| 19875 | root | 222.95.56.226:8497 | fo | Sleep | 1017 | | NULL |
| 19877 | root | 222.95.56.226:8499 | fo | Sleep | 1007 | | NULL |
| 19878 | root | 222.95.56.226:8500 | fo | Sleep | 1002 | | NULL |
| 19879 | root | 222.95.56.226:8501 | fo | Sleep | 631 | | NULL |
| 19880 | root | 222.95.56.226:8508 | fo | Sleep | 668 | | NULL |
| 19881 | root | AY130121082434a.local:34006 | fo | Sleep | 343 | | NULL |
| 19882 | root | AY130121082434a.local:34071 | moco | Sleep | 320 | | NULL |
| 19883 | root | AY130121082434a.local:34072 | moco | Sleep | 320 | | NULL |
| 19884 | root | AY130121082434a.local:34073 | moco | Sleep | 320 | | NULL |
| 19885 | root | AY130121082434a.local:34074 | moco | Sleep | 320 | | NULL |
| 19886 | root | AY130121082434a.local:34075 | moco | Sleep | 320 | | NULL |
| 19887 | root | AY130121082434a.local:34076 | moco | Sleep | 320 | | NULL |
| 19889 | root | AY130121082434a.local:34078 | moco | Sleep | 320 | | NULL |
| 19890 | root | AY130121082434a.local:34079 | moco | Sleep | 320 | | NULL |
| 19888 | root | AY130121082434a.local:34077 | moco | Sleep | 320 | | NULL |
| 19891 | root | AY130121082434a.local:34080 | moco | Sleep | 320 | | NULL |
| 19892 | root | AY130121082434a.local:34081 | moco | Sleep | 320 | | NULL |
| 19893 | root | AY130121082434a.local:34083 | moco | Sleep | 320 | | NULL |
| 19894 | root | AY130121082434a.local:34084 | moco | Sleep | 320 | | NULL |
| 19895 | root | AY130121082434a.local:34085 | moco | Sleep | 320 | | NULL |
| 19896 | root | AY130121082434a.local:34086 | moco | Sleep | 320 | | NULL |
| 19897 | root | AY130121082434a.local:34087 | moco | Sleep | 320 | | NULL |
| 19898 | root | AY130121082434a.local:34088 | mo | Sleep | 257 | | NULL |
| 19899 | root | localhost | NULL | Query | 0 | NULL | show full processlist |
| 19901 | unauthenticated user | 211.149.151.45:4090 | NULL | Connect | NULL | login | NULL |
+-------+----------------------+-----------------------------+------+---------+------+-------+-----------------------+
查看mysql状态
[sql]
mysql> show status;
+-----------------------------------+-----------+
| Variable_name | Value |
+-----------------------------------+-----------+
| Aborted_clients | 1574 |
| Aborted_connects | 3890 |
| Binlog_cache_disk_use | 0 |
| Binlog_cache_use | 0 |
| Bytes_received | 181 |
| Bytes_sent | 25363 |
| Com_admin_commands | 0 |
| Com_assign_to_keycache | 0 |
| Com_alter_db | 0 |
| Com_alter_db_upgrade | 0 |
| Com_alter_event | 0 |
| Com_alter_function | 0 |
| Com_alter_procedure | 0 |
| Com_alter_server | 0 |
| Com_alter_table | 0 |
| Com_alter_tablespace | 0 |
| Com_analyze | 0 |
| Com_backup_table | 0 |
| Com_begin | 0 |
| Com_binlog | 0 |
| Com_call_procedure | 0 |
| Com_change_db | 0 |
| Com_change_master | 0 |
| Com_check | 0 |
| Com_checksum | 0 |
| Com_commit | 0 |
| Com_create_db | 0 |
| Com_create_event | 0 |
| Com_create_function | 0 |
| Com_create_index | 0 |
| Com_create_procedure | 0 |
| Com_create_server | 0 |
| Com_create_table | 0 |
| Com_create_trigger | 0 |
| Com_create_udf | 0 |
| Com_create_user | 0 |
| Com_create_view | 0 |
| Com_dealloc_sql | 0 |
| Com_delete | 0 |
| Com_delete_multi | 0 |
| Com_do | 0 |
| Com_drop_db | 0 |
| Com_drop_event | 0 |
| Com_drop_function | 0 |
| Com_drop_index | 0 |
| Com_drop_procedure | 0 |
| Com_drop_server | 0 |
| Com_drop_table | 0 |
| Com_drop_trigger | 0 |
| Com_drop_user | 0 |
| Com_drop_view | 0 |
| Com_empty_query | 0 |
| Com_execute_sql | 0 |
| Com_flush | 0 |
| Com_grant | 0 |
| Com_ha_close | 0 |
| Com_ha_open | 0 |
| Com_ha_read | 0 |
| Com_help | 0 |
| Com_insert | 0 |
| Com_insert_select | 0 |
| Com_install_plugin | 0 |
| Com_kill | 0 |
| Com_load | 0 |
| Com_load_master_data | 0 |
| Com_load_master_table | 0 |
| Com_lock_tables | 0 |
| Com_optimize | 0 |
| Com_preload_keys | 0 |
| Com_prepare_sql | 0 |
| Com_purge | 0 |
| Com_purge_before_date | 0 |
| Com_release_savepoint | 0 |
| Com_rename_table | 0 |
| Com_rename_user | 0 |
| Com_repair | 0 |
| Com_replace | 0 |
| Com_replace_select | 0 |
| Com_reset | 0 |
| Com_restore_table | 0 |
| Com_revoke | 0 |
| Com_revoke_all | 0 |
| Com_rollback | 0 |
| Com_rollback_to_savepoint | 0 |
| Com_savepoint | 0 |
| Com_select | 1 |
| Com_set_option | 0 |
| Com_show_authors | 0 |
| Com_show_binlog_events | 0 |
| Com_show_binlogs | 0 |
| Com_show_charsets | 0 |
| Com_show_collations | 0 |
| Com_show_column_types | 0 |
| Com_show_contributors | 0 |
| Com_show_create_db | 0 |
| Com_show_create_event | 0 |
| Com_show_create_func | 0 |
| Com_show_create_proc | 0 |
| Com_show_create_table | 0 |
| Com_show_create_trigger | 0 |
| Com_show_databases | 0 |
| Com_show_engine_logs | 0 |
| Com_show_engine_mutex | 0 |
| Com_show_engine_status | 0 |
| Com_show_events | 0 |
| Com_show_errors | 0 |
| Com_show_fields | 0 |
| Com_show_function_status | 0 |
| Com_show_grants | 0 |
| Com_show_keys | 0 |
| Com_show_master_status | 0 |
| Com_show_new_master | 0 |
| Com_show_open_tables | 0 |
| Com_show_plugins | 0 |
| Com_show_privileges | 0 |
| Com_show_procedure_status | 0 |
| Com_show_processlist | 2 |
| Com_show_profile | 0 |
| Com_show_profiles | 0 |
| Com_show_slave_hosts | 0 |
| Com_show_slave_status | 0 |
| Com_show_status | 1 |
| Com_show_storage_engines | 0 |
| Com_show_table_status | 0 |
| Com_show_tables | 0 |
| Com_show_triggers | 0 |
| Com_show_variables | 1 |
| Com_show_warnings | 0 |
| Com_slave_start | 0 |
| Com_slave_stop | 0 |
| Com_stmt_close | 0 |
| Com_stmt_execute | 0 |
| Com_stmt_fetch | 0 |
| Com_stmt_prepare | 0 |
| Com_stmt_reprepare | 0 |
| Com_stmt_reset | 0 |
| Com_stmt_send_long_data | 0 |
| Com_truncate | 0 |
| Com_uninstall_plugin | 0 |
| Com_unlock_tables | 0 |
| Com_update | 0 |
| Com_update_multi | 0 |
| Com_xa_commit | 0 |
| Com_xa_end | 0 |
| Com_xa_prepare | 0 |
| Com_xa_recover | 0 |
| Com_xa_rollback | 0 |
| Com_xa_start | 0 |
| Compression | OFF |
| Connections | 19904 |
| Created_tmp_disk_tables | 0 |
| Created_tmp_files | 5 |
| Created_tmp_tables | 1 |
| Delayed_errors | 0 |
| Delayed_insert_threads | 0 |
| Delayed_writes | 0 |
| Flush_commands | 1 |
| Handler_commit | 0 |
| Handler_delete | 0 |
| Handler_discover | 0 |
| Handler_prepare | 0 |
| Handler_read_first | 0 |
| Handler_read_key | 0 |
| Handler_read_next | 0 |
| Handler_read_prev | 0 |
| Handler_read_rnd | 0 |
| Handler_read_rnd_next | 277 |
| Handler_rollback | 0 |
| Handler_savepoint | 0 |
| Handler_savepoint_rollback | 0 |
| Handler_update | 0 |
| Handler_write | 276 |
| Innodb_buffer_pool_pages_data | 508 |
| Innodb_buffer_pool_pages_dirty | 0 |
| Innodb_buffer_pool_pages_flushed | 8159 |
| Innodb_buffer_pool_pages_free | 1 |
| Innodb_buffer_pool_pages_misc | 3 |
| Innodb_buffer_pool_pages_total | 512 |
| Innodb_buffer_pool_read_ahead_rnd | 611 |
| Innodb_buffer_pool_read_ahead_seq | 181 |
| Innodb_buffer_pool_read_requests | 23149188 |
| Innodb_buffer_pool_reads | 9484 |
| Innodb_buffer_pool_wait_free | 0 |
| Innodb_buffer_pool_write_requests | 190314 |
| Innodb_data_fsyncs | 16464 |
| Innodb_data_pending_fsyncs | 0 |
| Innodb_data_pending_reads | 0 |
| Innodb_data_pending_writes | 0 |
| Innodb_data_read | 268521472 |
| Innodb_data_reads | 11361 |
| Innodb_data_writes | 21253 |
| Innodb_data_written | 283684352 |
| Innodb_dblwr_pages_written | 8159 |
| Innodb_dblwr_writes | 1459 |
| Innodb_log_waits | 0 |
| Innodb_log_write_requests | 20515 |
| Innodb_log_writes | 12238 |
| In
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Go language connects to the database by importing the database driver, establishing a database connection, executing SQL statements, using prepared statements and transaction processing. Detailed introduction: 1. Import the database driver and use the github.com/go-sql-driver/mysql package to connect to the MySQL database; 2. Establish a database connection and provide the database connection information, including the database address, user name, password, etc. Establish a database connection and so on through the sql.Open function.
Using Go language to connect to the database: improve application performance and efficiency
Jan 23, 2024 am 08:57 AM
Using Go language to connect to the database: Improving application performance and efficiency As applications develop and the number of users increases, data storage and processing become more and more important. In order to improve the performance and efficiency of applications, properly connecting and operating the database is a crucial part. As a fast, reliable, and highly concurrency development language, Go language has the potential to provide efficient performance when processing databases. This article will introduce how to use Go language to connect to the database and provide some code examples. Install database driver using Go language
Steps and techniques for implementing product inventory counting with PHP
Aug 18, 2023 am 08:39 AM
Steps and techniques for implementing product inventory in PHP In the e-commerce industry, product inventory management is a very important task. Timely and accurate inventory counting can avoid sales delays, customer complaints and other problems caused by inventory errors. This article will introduce the steps and techniques on how to use PHP to implement product inventory counting, and provide code examples. Step 1: Create a database First, we need to create a database to store product information. Create a database named "inventory" and then create a database named "prod
Getting Started with Go Language: Basic Concepts of Database Connections
Jan 23, 2024 am 08:17 AM
Learn Go language: basic knowledge of connecting to databases, specific code examples are required. Go language is an open source programming language. Its simple and efficient features make it loved and used by more and more developers. During the development process, it is often necessary to establish a connection with the database to perform operations such as reading, writing, updating, and deleting data. Therefore, learning how to connect to a database in Go language is a very important skill. Database driver In the Go language, a database driver is required to connect to the database. At present, the main database drivers of Go language are:
What are the important functions of MySQL's Jar package?
Mar 01, 2024 pm 09:45 PM
Title: What are the important functions of MySQL’s Jar package? MySQL is a popular relational database management system that many Java developers use when developing applications. In order to interact with the MySQL database in a Java project, the official Java driver Jar package provided by MySQL is usually used. MySQL's Jar package has many important functions. This article will introduce some of them and provide specific code examples. 1. Connect to MyS
How to install and configure PHP on Ubuntu system to connect to MSSQL database
Feb 29, 2024 am 10:06 AM
Installing and configuring PHP on Ubuntu systems to connect to MSSQL databases is a common task, especially when developing web applications. In this article, we will introduce how to install PHP, MSSQL extensions and configure database connections on Ubuntu systems, while providing specific code examples. Step 1: Install PHP and MSSQL extensions Install PHP First, you need to make sure that PHP is installed on your Ubuntu system. PHP can be installed with the following command: sudoaptu
