珎珎啊

react使用context传参

鼠标悬浮展示图标

form表单自定义校验，form表单提交，树形下拉框

表格行点击样式，通过表格的rowClassName属性，给行添加类名

监听页面放大缩小window.οnresize放大倍数window.devicePixelRatio

切换用户su - username查看用户selecet * from USER$;删除用户 CASCADEDROP USER USERNAME CASCADE；删除角色#DROP ROLE name;删除表空间DROP TABLESPACE name INCLUDING CONTENTS AND DATA FILES;DROP TABLESPACE nameindex INCLUDING CONTENTS AND DATAFILES；DROP USER USERDB userdb;