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DB2创建表和Oracle的区别

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Release: 2016-06-07 17:07:49
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在db2中如果想创建和已知表表结构类似的表,可以使用:(1)create table a as select * from b where 1lt;gt;1; ----仅创建表

在db2中如果想创建和已知表表结构类似的表,可以使用:

(1)create table a as select * from b where 11;   ----仅创建表,,不导入数据。

(2)create table a as select * from b                           ----创建表a,连同b中的数据也要copy到要创建的a表中去。

(3)create table a as select a,b,c,d,e from b  where 11   ----创建a表,表结构和b表中的a,b,c,d,e这5个列一致,并且不包含表数据。

如果在db2中要完成类似的任务,可以使用如下语句执行。

(1)create table a like b;

(2)create table a like b;

insert into a (select * from b);

(3)create table a as (select a,b,c,d,e from b) definition only;

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