激活码如下：

9MWZD5CC4E-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-ocfH5r7aj6756M8f6f+7MXdp2K0RxPCG2Yp9/iIydFQxHCSjqjUopo2yAxH8+EtTGm+w4dKPe+6tLqa/HOExPt9g3yOf29PU7oIwmqnIcnvZYGNCgNsCK7fyfxc2CX1whLZTByQ0LKylRshlsYz+HXg002E7q7bY0y3vbwxWLyNR5qY4EPa4WzfWjdnopCZfijgsU0bTRB51jiqVlLHONKjFFUmzPopUDwEHwDTnmNMEUAsluTaiirWIJwkmuFbsgmir+KUAxHvStOUgo68Vyaas7BicAWI1QiCqd1EvFIN/sGaZkRE9hK6FwkDN/hscDX1DCPY62ttgP/k1GvFOVA==-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

-- 查询单表数据库编码
show full columns from sys_user;

-- 查询编码
SHOW VARIABLES WHERE Variable_name LIKE 'character_set_%' OR Variable_name LIKE 'collation%';

-- 修改表编码
ALTER TABLE sys_user CONVERT TO CHARACTER SET utf8mb4;
ALTER TABLE account CONVERT TO CHARACTER SET utf8mb4;

-- 修改数据库编码
ALTER DATABASE mydb CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;

ANF报错：
Remote object proxy returned error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.commcenter.coretelephony.xpc was invalidated." UserInfo={NSDebugDescription=The connection to service named com.apple.commcenter.coretelephony.xpc was invalidated.}

解决办法：

在终端运行：
xcrun simctl spawn booted log config --mode "level:off" --subsystem com.apple.CoreTelephony

-- 查询数据库最大内容使用量
use master
go
select value,*  from sys.configurations  where name like '%max server memory (MB)%'
go


--下方是修改配置请谨慎使用
EXEC sp_configure 'show advanced options', 1  
RECONFIGURE WITH OVERRIDE
GO

exec sys.sp_configure 'max server memory (MB)',1024
RECONFIGURE WITH OVERRIDE
Go
select value,*  from sys.configurations   where name like '%max server memory (MB)%'

sqlserver控制台方法，在服务器属性设置：

一般需给系统预留一部分内存，修改后立即生效。

配置值：代表相关设置值 运行值:查看配置是否成功。

-- 获取SQL Server允许同时用户连接的最大数
select @@max_connections as max_connections;
-- 获取自上次启动 SQL Server服务 以来连接或试图连接的次数
SELECT @@CONNECTIONS as CONNECTIONS;