oraclesql-创新互联

Data Definition

创新互联专注为客户提供全方位的互联网综合服务,包含不限于网站建设、成都网站设计、巴东网络推广、小程序制作、巴东网络营销、巴东企业策划、巴东品牌公关、搜索引擎seo、人物专访、企业宣传片、企业代运营等,从售前售中售后,我们都将竭诚为您服务,您的肯定,是我们大的嘉奖;创新互联为所有大学生创业者提供巴东建站搭建服务,24小时服务热线:028-86922220,官方网址:www.cdcxhl.com

          CREATE, to create a new database object
          ALTER, to change an aspect of the structure of an existing database object
          DROP, to drop (remove) a database object

Data Manipulation and Transactions

         INSERT, to add rows to a table
         UPDATE, to change column values of existing rows
         DELETE, to remove rows from a table

COMMIT, to confirm all pending changes of the current transaction
ROLLBACK, to cancel all pending changes and restore the original situation

DELETE empties a table; DROP removes a table. TRUNCATE allows you to delete all the rows in a table in an efficient (but irrevocable) way.
UPDATE changes the contents of a table; ALTER changes its structure.
You can undo the consequences of data manipulation with ROLLBACK; data definition commands are irrevocable.

另外有需要云服务器可以了解下创新互联cdcxhl.cn,海内外云服务器15元起步,三天无理由+7*72小时售后在线,公司持有idc许可证,提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案,具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势,专为企业上云打造定制,能够满足用户丰富、多元化的应用场景需求。


网页题目:oraclesql-创新互联
浏览地址:http://scjbc.cn/article/degohh.html

其他资讯