Port Data from ORACLE to DB2

Compare the data types migrated from ORACLE to DB2 and Oracle. I will use some specific examples to demonstrate the differences between DB2 and Oracle in detail: 1. Date Oracle date usage: create table date_demo (day_demo varchar2 (25), actualDate DATE, detaildate DATE); insert data into date_demo values ('new years', to_date ('01-02-2002 ', 'dd-MON-YYYY '), to_date ('01-02-2002', 'dd-MON-YYYY '),...; view results: select * from date_demo; day_demo actualDate detaildate ---------------------- ------------ new years 01-02 -2002 01-02-2002new years 01-02-2002 01-02-2002 ......; DB2 DATE usage: Create table date_demo (day_demo char (25), actualDate DATE, detaildate DATE); insert data into date_demo values ('new ears ', ('01-02-2002 '), to_date ('01-02-2002 '),......; view results: select * from date_demo; day_demo actualDate detaildate ------------------------ ------------ new years 01-02-2002 01-02-2002new years 01-02-2002 01-02-2002. .....; Ii. Sequence usage of Oracle: create table dep (deptno smallint not null, deptname varchar2 (36) not null, mgrno char (6), admrdept smallint not null, location char (30); create sequence dept_seq start with 200 increment by 1; then insert into dept values (dept_seq.nextval, 'sales', 'Smith ', 55, 'downloading '), (dept_seq.nextval, 'marketing ', 'wong', 12, 'midtown'), (dept_seq.nextval, 'accounting', 'fisher ', 300, 'uptown'); select * From dept; Sequence usage of DB2: first create a table: create table dept (deptno smallint not null generated always as identity (start with 200, increment by 1), deptname varchar (36) not null, location char (30); insert into dept values (default, 'sales', 'Smith, 50, 'downloading'), (default, 'marketing ', 'wong', 23, 'midtown'), (default, 'accounting', 'fisher '200, 'uptown'); query result: select * from dept; the result is the same as that of Oracle. 3. truncate the content of a large data table Oracle provides a function truncate to truncate a large data table. The statement truncate table tab_name is used to clear the table content and reorganize the table space, truncate is a DDL statement that cannot be rolled back. DB2 does not support the truncate statement, but provides two other methods to solve the above problem. (1) When creating a table, add the option not logged initially. When clearing the table, use alter table [name] activate not logged initially with empty table (2) first, create an empty file empty on the operating system. del, and then use the import command import from empty. del of del replace into [table_name] to clear the data in the table and reorganize the tablespace.