SIMPLE table: partitions: NULL type: ref possible_: CountryCode key: CountryCode key_len: 3 ref: world.co.Code rows: 18 filtered: 100 Extra: Using join buffer (Batched Key Access) 2 rows in set, 1 warning (0.0007 sec) 注意看执行计划中Extra 的关键字 "Using join buffer,说明 join...
simple:简单查询。查询不包含子查询和union primary:复杂查询中最外层的 select subquery:包含在 select 中的子查询(不在 from 子句中) derived:包含在 from 子句中的子查询。MySQL会将结果存放在一个临时表中,也称为派生表(derived的英文含义) 3、table 查询的是哪张表,比较好理解 4、partitions 查询时匹配到的...
| 1 | SIMPLE | test | NULL | ALL | NULL | NULL | NULL | NULL | 959692 | 100.00 | NULL | | 1 | SIMPLE | test2 | NULL | ALL | NULL | NULL | NULL | NULL | 958353 | 100.00 | Using where; Using join buffer (Block Nested Loop) | +---+---+---+---+---+---+---...
1 warning (0.00 sec) # 设置为索引可见， mysql> alter table t1 alter index idx_c1 visib...
set_sql_command_code() : Sql_cmd_dcl_dummy, Sql_cmd_ddl_dummy set_sql_data_access() : dd::Function_impl, dd::Library_impl, dd::Procedure_impl, dd::Routine, dd::Routine_impl set_sql_delay() : Relay_log_info set_sql_errno() : Sql_resultset set_sql_info() : routing_guidelines...
Simple Example // Require and initialize outside of your main handlerconstmysql=require('serverless-mysql')({config:{host:process.env.ENDPOINT,database:process.env.DATABASE,user:process.env.USERNAME,password:process.env.PASSWORD}})// Main handler functionexports.handler=async(event,context)=>{//...
Here is a simple example: var connection = mysql.createConnection({ host : 'localhost', ssl : { ca : fs.readFileSync(__dirname + '/mysql-ca.crt') } }); You can also connect to a MySQL server without properly providing the appropriate CA to trust. You should not do this. var con...
Support SqlServer、MySql、PgSql and Oracle insert bulkcopy Split table big data self-processing Support Multi-tenant, multi-library transactions Support CodeFirst data migration. Support Join query 、 Union all 、 Subquery Support Configure the query ...
SimpleApp io.mycat.Mycatup start 7):测试mycat的可用性 mysql -uappuser -pmtls0352 -h10.186.19.14 -P8066 mysql: [] Using a password on the command line interface can be insecure. Welcome to the MySQLmonitor. Commands end with ; or \g. Your MySQL connection id is 1 ...
You can find more details on these indicators here:Indicators description. MySQLTuner needs you MySQLTunerneeds contributors for documentation, code and feedback: Please join us on our issue tracker atGitHub tracker. Contribution guide is available followingMySQLTuner contributing guide ...