Table space is created, routine maintenance and management

01 Create a data table space

Locally managed tablespaces:

create tablespace test01 
　　datafile '/oracle/oradata/orcl/test01a.dbf' 
　　size 2m 
　　autoextend off 
　　segment space management auto;

autoextend off - do not automatically expand

segment space management auto - Automatic Segment Management, recommended

Do not automatically extended table space

CREATE TABLESPACE test02 LOGGING DATAFILE 
　　'/oracle/oradata/orcl/test02a.dbf' SIZE 2M AUTOEXTEND OFF, 
　　'/oracle/oradata/orcl/test02b.dbf' SIZE 2M AUTOEXTEND OFF 
　　EXTENT MANAGEMENT LOCAL 
　　SEGMENT SPACE MANAGEMENT AUTO;

Automatic extension table space

CREATE TABLESPACE test03 LOGGING DATAFILE 
    '/oracle/oradata/orcl/test03a.dbf' SIZE 2M AUTOEXTEND ON NEXT 1M MAXSIZE 20M, 
    '/oracle/oradata/orcl/test03b.dbf' SIZE 2M AUTOEXTEND ON NEXT 1M MAXSIZE 20M 
    EXTENT MANAGEMENT LOCAL 
    SEGMENT SPACE MANAGEMENT AUTO;

Create a large table space:

CREATE BIGFILE TABLESPACE bigtbs DATAFILE 
    '/u02/oracle/data/bigtbs01.dbf' SIZE 50G;

02 create a temporary table space

create temporary tablespace temp1 
    tempfile '/oracle/oradata/orcl/temp1.dbf' size 5m autoextend off;

03 UNDO table space to create

create undo tablespace testundo1 
    datafile '/oracle/oradata/orcl/testundo1.dbf' size 2m autoextend off;

Expand and modify the size of No. 04 space

Table space to add data files

alter tablespace temp1 
    add tempfile '/oracle/oradata/orcl/temp1b.dbf' size 5m autoextend off;

alter tablespace test01 
    add datafile '/oracle/oradata/orcl/test01b.dbf' size 1m autoextend off;

Modify the table space file size

alter database 
    datafile '/oracle/oradata/orcl/test02b.dbf' resize 2m;

select name, bytes from v$tempfile;

alter database 
    tempfile '/oracle/oradata/orcl/temp1.dbf' resize 5m;

05 table space renaming

ALTER TABLESPACE test03 RENAME TO test04;

06 Delete table space

drop tablespace testundo1; - delete table space, without deleting the corresponding data file

drop tablespace test04 including contents and datafiles; - plus the option to delete files with the data together

ORA-02449:: unique / primary keys in table referenced by foreign keys if there

select p.owner,

　　p.table_name,

　　p.constraint_name,

　　f.table_name referencing_table,

　　f.constraint_name foreign_key_name,

　　f.status fk_status

from dba_constraints P,

　　dba_constraints F,

　　dba_tables T

where p.constraint_name = f.r_constraint_name

　　and f.constraint_type = 'R'

　　and p.table_name = t.table_name

　　and t.tablespace_name = UPPER('&tablespace_name')

order by 1,2,3,4,5;

Delete the table space and the corresponding table space file

drop tablespace test04 including contents and datafiles cascade constraints;

07 read-write mode change table space

alter tablespace test01 read only; --test01 read only tablespace

alter tablespace test01 read write; - test01 tablespace writable

View table space states

select tablespace_name,status from dba_tablespaces;

Read-write mode table

alter table test read only; - read-only table so 
alter table test read write; - so that the table can be read

08 Change the table space online mode

alter tablespace users offline; - offline user table space 

alter database datafile 6 offline; - 6 offline data file 

alter database datafile 6 offline for drop; - 6 data file offline, and needs to be recovered 

alter database datafile 6 online; - - the No. 6 files online 

recover datafile 6; - 6 file recovery

Table space is created, routine maintenance and management

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