view, sequence, synonym, tablespace

Synonyms:

Create private synonyms

create synonymep for scott.emp

Create shared synonyms

Create public synonym ep for scott.emp

view

Modify the view:

Create or replace view view name

As

     check sentence

 

  It is also possible to delete data

   

  Views can be read-only

         With read only

Views can store query results from multiple tables

sequence:

Create sequence sequence name

Minvalue first number

Increment by self-increment

Maxvalue maximum number (nomanvalue cancels the maximum number)

Nocache buffer cancellation

Cycle cycle

 

View sequence auto increment

Select sequence name.nextvalfrom dual

 

 

 

tablespace

Oracle data tables are stored in tablespaces

 

No permission on tablespace

     Grant unlimited tablespace to xx

 

Temporary table space: For example, sorting and indexing will use temporary table space and release it immediately after use

grant tablespace

      Alter user username default tablespace tablespace name

 

Use tablespace permissions:

      Grant unlimited tablespace to username

drop tablespace

      Drop tablespace tablespace name

Drop the tablespace that holds the data

Droptablespace tablespace name INCLUDING CONTENTS

 

Sqlserver database

      Use select* into new table name from table name

Create tablespace:

createtablespace mytb

datafile 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\mytb.DBF'

size 30m