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