I’ve always appreciated the CREATE OR REPLACE functionality in Oracle for views, packages and triggers, and I’ve often wanted a similar CREATE OR REPLACE TABLE. Many times, I’ll find myself needing to quickly
在SQL Server 2016 SP1中引入了一个新特性:Create Or Alter ,这个语句的功能与Oracle的Create Or Replace是完全一样的。 只能用于视图、存储过程、用户定义函数和触发器,不能用于表、索引等。
ALTER TABLE文でMODIFY句を指定すると、既存の列またはパーティションの定義を変更できます。 関連項目: オブジェクトの作成の詳細は、『Oracle Database管理者ガイド』および「CREATE TYPE」を参照してください。 表の変更および削除の詳細は、「ALTER TABLE」および「DROP TABLE」を参照してくださ...
DROP TABLEuser.test相当于放入回收站 DROP 的表可以用闪回恢复 FLASHBACK TABLEusername.table_nameTO BEFORE DROP DROP TABLEusername.table_namepurge彻底删除,不放回收站 清空数据表 TRUNCATE TABLEusername.table_name清空表数据,保存表结构
CREATE TABLE:TheSQL commandis used to create a new table. table_name:The name of the table that you want to create. Replace this with the name of the table you want. column1, column2, …:You can define the table by specifying the names of the columns. ...
SQL codecreate or replace package P_Rpt_Rate_Evection istype cur is ref cursorprocedure Rpt_Rate_EvectionStartDate in date,---开始日期EndDate in date,---结束日期DepartMent in varchar2,--部门名称HandleMan in varchar2---报销人end P_Rpt_Rate_Evection...
SQL 型 V4.2.2 参考指南 SQL 参考 SQL 语法 普通租户(Oracle 模式) SQL 语句 DDL CREATE TABLE 更新时间:2025-03-25 15:41:28 编辑 描述 该语句用来在数据库中创建一张新表。 语法 CREATE[GLOBALTEMPORARY]TABLEtable_name(table_definition_list)[table_option_list][partition_option][on_commit_option]CRE...
To enable a unique or primary key constraint, you must have the privileges necessary to create an index on the table. You need these privileges because Oracle Database creates an index on the columns of the unique or primary key in the schema containing the table. To specify an edition in...
www.oracledatabase12g.com SQL> create or replace procedure maclean_proc as 2 begin 3 execute immediate 'select 1 from dual'; 4 end; 5 / Procedure created. SQL> select * from dba_source where name='MACLEAN_PROC'; OWNER NAME TYPE LINE TEXT ...
create table toys_clone as select * from toys;Easy, right?Yes. But, as always, there's more to it than this. You'll want to add some constraints to your table. And there are many types of table available in Oracle Database, including:Table...