oracle、mssql、mysql数据SQL语句包含关键字的字符区别
oracle 关键字的标示符为[ ] 示例: select [table] , [username] from [table] where [id]
mssql 关键字的标示符为[ ] 示例: select [table] , [username] from [table] where [id]
mysql 关键字的标示符为` ` 示例: select `table` , `username` from `table` where `id`