摘要： show variables like '%read_only%';+ + +| Variable_name | Value |+ + +| innodb_read_only | OFF || read_only | OFF || super_read_only | OFF || transacti 阅读全文

摘要： oracle 修改会话级别参数 alter session set current_schema=scott alter session set statistics_level=all; 修改全局参数 alter system set memory_target=10G scope=spfile; 阅读全文

摘要： TIMESTAMP Data Type The TIMESTAMP data type is an extension of the DATE data type. It stores the year, month, and day of the DATE data type, plus hour 阅读全文