oraclesql

Data Definition

创新互联成立于2013年，是专业互联网技术服务公司，拥有项目网站制作、成都网站制作网站策划，项目实施与项目整合能力。我们以让每一个梦想脱颖而出为使命，1280元陆良做网站,已为上家服务,为陆良各地企业和个人服务,联系电话:028-86922220

          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.

文章题目：oraclesql
网页链接：https://www.cdcxhl.com/article0/jicjoo.html

成都网站建设公司_创新互联，为您提供网站排名、外贸建站、面包屑导航、电子商务、响应式网站、网站制作

广告

声明：本网站发布的内容（图片、视频和文字）以用户投稿、用户转载内容为主，如果涉及侵权请尽快告知，我们将会在第一时间删除。文章观点不代表本网站立场，如需处理请联系客服。电话：028-86922220；邮箱：631063699@qq.com。内容未经允许不得转载，或转载时需注明来源： 创新互联