如果数据库异常，请到安装数据库的错误日志里查看错误原因，根据日志中的错误信息去解决问题！！！
这样的错误出现好多次了，这次记住根本解决办法，查看日志！！！
如果日志像下面这样没有[ERROR]的日志出现就ok！
2019-05-20T09:17:23.290060Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2019-05-20T09:17:23.290118Z 0 [Warning] 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release. 2019-05-20T09:17:23.292216Z 0 [Note] C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe (mysqld 5.7.24-log) starting as process 11284 ... 2019-05-20T09:17:23.303832Z 0 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions 2019-05-20T09:17:23.305119Z 0 [Note] InnoDB: Uses event mutexes 2019-05-20T09:17:23.305639Z 0 [Note] InnoDB: _mm_lfence() and _mm_sfence() are used for memory barrier 2019-05-20T09:17:23.306417Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11 2019-05-20T09:17:23.307034Z 0 [Note] InnoDB: Adjusting innodb_buffer_pool_instances from 8 to 1 since innodb_buffer_pool_size is less than 1024 MiB 2019-05-20T09:17:23.308356Z 0 [Note] InnoDB: Number of pools: 1 2019-05-20T09:17:23.308972Z 0 [Note] InnoDB: Not using CPU crc32 instructions 2019-05-20T09:17:23.312122Z 0 [Note] InnoDB: Initializing buffer pool, total size = 8M, instances = 1, chunk size = 8M 2019-05-20T09:17:23.313453Z 0 [Note] InnoDB: Completed initialization of buffer pool 2019-05-20T09:17:23.336093Z 0 [Note] InnoDB: Highest supported file format is Barracuda. 2019-05-20T09:17:23.381502Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables 2019-05-20T09:17:23.382721Z 0 [Note] InnoDB: Setting file '.\ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2019-05-20T09:17:23.397756Z 0 [Note] InnoDB: File '.\ibtmp1' size is now 12 MB. 2019-05-20T09:17:23.399753Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active. 2019-05-20T09:17:23.400641Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active. 2019-05-20T09:17:23.401513Z 0 [Note] InnoDB: Waiting for purge to start 2019-05-20T09:17:23.453702Z 0 [Note] InnoDB: 5.7.24 started; log sequence number 2591440 2019-05-20T09:17:23.454732Z 0 [Note] InnoDB: Loading buffer pool(s) from C:\ProgramData\MySQL\MySQL Server 5.7\Data\ib_buffer_pool 2019-05-20T09:17:23.454733Z 0 [Note] Plugin 'FEDERATED' is disabled. 2019-05-20T09:17:23.462381Z 0 [Note] Plugin mysqlx reported: 'Scheduler "work" started.' 2019-05-20T09:17:23.463206Z 0 [Note] Plugin mysqlx reported: 'Scheduler "network" started.' 2019-05-20T09:17:23.468706Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key 2019-05-20T09:17:23.468820Z 0 [Note] InnoDB: Buffer pool(s) load completed at 190520 17:17:23 2019-05-20T09:17:23.469939Z 0 [Note] Server hostname (bind-address): '*'; port: 3306 2019-05-20T09:17:23.471506Z 0 [Note] IPv6 is available. 2019-05-20T09:17:23.471961Z 0 [Note] - '::' resolves to '::'; 2019-05-20T09:17:23.472505Z 0 [Note] Server socket created on IP: '::'. 2019-05-20T09:17:23.498822Z 0 [Note] Failed to start slave threads for channel '' 2019-05-20T09:17:23.508962Z 0 [Note] Event Scheduler: Loaded 0 events 2019-05-20T09:17:23.509621Z 0 [Note] C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe: ready for connections. Version: '5.7.24-log' socket: '' port: 3306 MySQL Community Server (GPL) 2019-05-20T09:17:23.715912Z 0 [Note] Plugin mysqlx reported: 'Neither MySQL Server nor Mysqlx Plugin has valid SSL configuration' 2019-05-20T09:17:23.716968Z 0 [Warning] Plugin mysqlx reported: 'Failed at SSL configuration: "SSL context is not usable without certificate and private key"' 2019-05-20T09:17:23.718147Z 0 [Note] Plugin mysqlx reported: 'For more information, please see the Using Secure Connections with X Plugin section in the MySQL documentation.' 2019-05-20T09:17:23.719507Z 0 [Note] Plugin mysqlx reported: 'IPv6 is available' 2019-05-20T09:17:23.720236Z 0 [Note] Plugin mysqlx reported: 'X Plugin listens on TCP (bind-address:'::', port:33060)' 2019-05-20T09:17:23.721168Z 0 [Note] Plugin mysqlx reported: 'Server starts handling incoming connections' 2019-05-20T09:17:24.573414Z 5 [Note] Access denied for user 'root'@'localhost' (using password: NO) 2019-05-20T09:17:38.317016Z 0 [Note] C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe: Normal shutdown 2019-05-20T09:17:38.318472Z 0 [Note] Giving 0 client threads a chance to die gracefully 2019-05-20T09:17:38.319471Z 0 [Note] Shutting down slave threads 2019-05-20T09:17:38.328333Z 0 [Note] Forcefully disconnecting 0 remaining clients 2019-05-20T09:17:38.329363Z 0 [Note] Event Scheduler: Purging the queue. 0 events 2019-05-20T09:17:38.333663Z 0 [Note] Binlog end 2019-05-20T09:17:38.336809Z 0 [Note] Shutting down plugin 'mysqlx' 2019-05-20T09:17:38.337609Z 0 [Note] Plugin mysqlx reported: 'Exiting' 2019-05-20T09:17:38.338412Z 0 [Note] Plugin mysqlx reported: 'Stopped handling incoming connections' 2019-05-20T09:17:38.339339Z 0 [Note] Plugin mysqlx reported: 'Scheduler "work" stopped.' 2019-05-20T09:17:38.341635Z 0 [Note] Plugin mysqlx reported: 'Scheduler "network" stopped.' 2019-05-20T09:17:38.342911Z 0 [Note] Plugin mysqlx reported: 'Exit done' 2019-05-20T09:17:38.343863Z 0 [Note] Shutting down plugin 'ngram' 2019-05-20T09:17:38.344791Z 0 [Note] Shutting down plugin 'partition' 2019-05-20T09:17:38.345927Z 0 [Note] Shutting down plugin 'BLACKHOLE' 2019-05-20T09:17:38.346797Z 0 [Note] Shutting down plugin 'ARCHIVE' 2019-05-20T09:17:38.347884Z 0 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA' 2019-05-20T09:17:38.348798Z 0 [Note] Shutting down plugin 'MRG_MYISAM' 2019-05-20T09:17:38.349724Z 0 [Note] Shutting down plugin 'MyISAM' 2019-05-20T09:17:38.350523Z 0 [Note] Shutting down plugin 'INNODB_SYS_VIRTUAL' 2019-05-20T09:17:38.351412Z 0 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES' 2019-05-20T09:17:38.352297Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES' 2019-05-20T09:17:38.354275Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS' 2019-05-20T09:17:38.355236Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN' 2019-05-20T09:17:38.356081Z 0 [Note] Shutting down plugin 'INNODB_SYS_FIELDS' 2019-05-20T09:17:38.357066Z 0 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS' 2019-05-20T09:17:38.358306Z 0 [Note] Shutting down plugin 'INNODB_SYS_INDEXES' 2019-05-20T09:17:38.360221Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS' 2019-05-20T09:17:38.361138Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLES' 2019-05-20T09:17:38.361987Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE' 2019-05-20T09:17:38.362941Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE' 2019-05-20T09:17:38.363906Z 0 [Note] Shutting down plugin 'INNODB_FT_CONFIG' 2019-05-20T09:17:38.364846Z 0 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED' 2019-05-20T09:17:38.365752Z 0 [Note] Shutting down plugin 'INNODB_FT_DELETED' 2019-05-20T09:17:38.366581Z 0 [Note] Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD' 2019-05-20T09:17:38.367373Z 0 [Note] Shutting down plugin 'INNODB_METRICS' 2019-05-20T09:17:38.368055Z 0 [Note] Shutting down plugin 'INNODB_TEMP_TABLE_INFO' 2019-05-20T09:17:38.368962Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS' 2019-05-20T09:17:38.369814Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU' 2019-05-20T09:17:38.370481Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE' 2019-05-20T09:17:38.371220Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET' 2019-05-20T09:17:38.372122Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX' 2019-05-20T09:17:38.373077Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET' 2019-05-20T09:17:38.374221Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM' 2019-05-20T09:17:38.375164Z 0 [Note] Shutting down plugin 'INNODB_CMP_RESET' 2019-05-20T09:17:38.376704Z 0 [Note] Shutting down plugin 'INNODB_CMP' 2019-05-20T09:17:38.377597Z 0 [Note] Shutting down plugin 'INNODB_LOCK_WAITS' 2019-05-20T09:17:38.378422Z 0 [Note] Shutting down plugin 'INNODB_LOCKS' 2019-05-20T09:17:38.379235Z 0 [Note] Shutting down plugin 'INNODB_TRX' 2019-05-20T09:17:38.380022Z 0 [Note] Shutting down plugin 'InnoDB' 2019-05-20T09:17:38.382133Z 0 [Note] InnoDB: FTS optimize thread exiting. 2019-05-20T09:17:38.383157Z 0 [Note] InnoDB: Starting shutdown... 2019-05-20T09:17:38.484514Z 0 [Note] InnoDB: Dumping buffer pool(s) to C:\ProgramData\MySQL\MySQL Server 5.7\Data\ib_buffer_pool 2019-05-20T09:17:38.487359Z 0 [Note] InnoDB: Buffer pool(s) dump completed at 190520 17:17:38 2019-05-20T09:17:39.596742Z 0 [Note] InnoDB: Shutdown completed; log sequence number 2591468 2019-05-20T09:17:39.597755Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2019-05-20T09:17:39.598414Z 0 [Note] Shutting down plugin 'MEMORY' 2019-05-20T09:17:39.598888Z 0 [Note] Shutting down plugin 'CSV' 2019-05-20T09:17:39.599348Z 0 [Note] Shutting down plugin 'sha256_password' 2019-05-20T09:17:39.599982Z 0 [Note] Shutting down plugin 'mysql_native_password' 2019-05-20T09:17:39.601046Z 0 [Note] Shutting down plugin 'binlog' 2019-05-20T09:17:39.603118Z 0 [Note] C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe: Shutdown complete 2019-05-20T09:18:00.616438Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2019-05-20T09:18:00.618419Z 0 [Warning] 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release. 2019-05-20T09:18:00.630801Z 0 [Note] C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe (mysqld 5.7.24-log) starting as process 4320 ... 2019-05-20T09:18:00.681342Z 0 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions 2019-05-20T09:18:00.682350Z 0 [Note] InnoDB: Uses event mutexes 2019-05-20T09:18:00.683029Z 0 [Note] InnoDB: _mm_lfence() and _mm_sfence() are used for memory barrier 2019-05-20T09:18:00.683998Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11 2019-05-20T09:18:00.684802Z 0 [Note] InnoDB: Adjusting innodb_buffer_pool_instances from 8 to 1 since innodb_buffer_pool_size is less than 1024 MiB 2019-05-20T09:18:00.689682Z 0 [Note] InnoDB: Number of pools: 1 2019-05-20T09:18:00.693218Z 0 [Note] InnoDB: Not using CPU crc32 instructions 2019-05-20T09:18:00.701522Z 0 [Note] InnoDB: Initializing buffer pool, total size = 8M, instances = 1, chunk size = 8M 2019-05-20T09:18:00.703996Z 0 [Note] InnoDB: Completed initialization of buffer pool 2019-05-20T09:18:00.733231Z 0 [Note] InnoDB: Highest supported file format is Barracuda. 2019-05-20T09:18:00.804927Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables 2019-05-20T09:18:00.806342Z 0 [Note] InnoDB: Setting file '.\ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2019-05-20T09:18:00.820605Z 0 [Note] InnoDB: File '.\ibtmp1' size is now 12 MB. 2019-05-20T09:18:00.822834Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active. 2019-05-20T09:18:00.825709Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active. 2019-05-20T09:18:00.828785Z 0 [Note] InnoDB: Waiting for purge to start 2019-05-20T09:18:00.880702Z 0 [Note] InnoDB: 5.7.24 started; log sequence number 2591468 2019-05-20T09:18:00.882023Z 0 [Note] InnoDB: Loading buffer pool(s) from C:\ProgramData\MySQL\MySQL Server 5.7\Data\ib_buffer_pool 2019-05-20T09:18:00.883464Z 0 [Note] Plugin 'FEDERATED' is disabled. 2019-05-20T09:18:00.911871Z 0 [Note] InnoDB: Buffer pool(s) load completed at 190520 17:18:00 2019-05-20T09:18:00.913087Z 0 [Note] Plugin mysqlx reported: 'Scheduler "work" started.' 2019-05-20T09:18:00.914174Z 0 [Note] Plugin mysqlx reported: 'Scheduler "network" started.' 2019-05-20T09:18:00.923582Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key 2019-05-20T09:18:00.926727Z 0 [Note] Server hostname (bind-address): '*'; port: 3306 2019-05-20T09:18:00.929136Z 0 [Note] IPv6 is available. 2019-05-20T09:18:00.929749Z 0 [Note] - '::' resolves to '::'; 2019-05-20T09:18:00.930683Z 0 [Note] Server socket created on IP: '::'. 2019-05-20T09:18:00.969912Z 0 [Note] Failed to start slave threads for channel '' 2019-05-20T09:18:01.028409Z 0 [Note] Event Scheduler: Loaded 0 events 2019-05-20T09:18:01.029142Z 0 [Note] C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe: ready for connections. Version: '5.7.24-log' socket: '' port: 3306 MySQL Community Server (GPL) 2019-05-20T09:18:01.176012Z 0 [Note] Plugin mysqlx reported: 'Neither MySQL Server nor Mysqlx Plugin has valid SSL configuration' 2019-05-20T09:18:01.177034Z 0 [Warning] Plugin mysqlx reported: 'Failed at SSL configuration: "SSL context is not usable without certificate and private key"' 2019-05-20T09:18:01.178391Z 0 [Note] Plugin mysqlx reported: 'For more information, please see the Using Secure Connections with X Plugin section in the MySQL documentation.' 2019-05-20T09:18:01.179787Z 0 [Note] Plugin mysqlx reported: 'IPv6 is available' 2019-05-20T09:18:01.180530Z 0 [Note] Plugin mysqlx reported: 'X Plugin listens on TCP (bind-address:'::', port:33060)' 2019-05-20T09:18:01.181458Z 0 [Note] Plugin mysqlx reported: 'Server starts handling incoming connections'
