Oracle将数据导入到修改的表中

这是一个场景模式，表1中有a、b、c列，这个表中充满了数据

然后，使用相同名称的模式2阶段表2，但删除了列a b和列d c，并添加了列d

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如何将数据从模式1导出到模式2

您是在尝试导出和导入数据，还是只是在同一数据库（甚至是链接数据库）中的两个架构之间复制数据？您是否试图将

c

数据放入

d

列，如果是，数据类型是否相同？

-- Specify the columns you want to copy, and the columns into which you want
-- them to be copied
insert into schema2.table2 (cola, colb, col_modified) select cola, colb, colc from schema1.table1;

-- Or start from scratch:
-- This will also drop indexes and triggers. If you want to keep them you must
-- preserve them.
drop table schema2.table2 purge;

create table schema2.table2 as select * from schema1.table1;
-- This does not include indexes or triggers, but it does have the table contents