配置Spring Boot通過@ConditionalOnProperty來控制Configuration是否生效 1、matchIfMissing屬性：從application.propertie ...

不能像sqlserver一樣用if not exists或者exists，應該這樣： DECLARE p_count int; set p_count=0; select 1 into p ...

sql server 判斷是否存在數據庫，表，列，視圖 1 判斷數據庫是否存在if exists (select * from sys.databases where name = '數據庫名') drop database [數據庫名 ...

先上代碼及實例 RegistryKey rsg = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Macromedia\FlashPaper Pr ...