Getting Information on Tables : user_tables « System Tables Data Dictionary « Oracle PL/SQL Tutorial






SQL>
SQL> desc user_tables;
 Name                           Null?    Type
 TABLE_NAME                     NOT NULL VARCHAR2(30)
 TABLESPACE_NAME                         VARCHAR2(30)
 CLUSTER_NAME                            VARCHAR2(30)
 IOT_NAME                                VARCHAR2(30)
 STATUS                                  VARCHAR2(8)
 PCT_FREE                                NUMBER
 PCT_USED                                NUMBER
 INI_TRANS                               NUMBER
 MAX_TRANS                               NUMBER
 INITIAL_EXTENT                          NUMBER
 NEXT_EXTENT                             NUMBER
 MIN_EXTENTS                             NUMBER
 MAX_EXTENTS                             NUMBER
 PCT_INCREASE                            NUMBER
 FREELISTS                               NUMBER
 FREELIST_GROUPS                         NUMBER
 LOGGING                                 VARCHAR2(3)
 BACKED_UP                               VARCHAR2(1)
 NUM_ROWS                                NUMBER
 BLOCKS                                  NUMBER
 EMPTY_BLOCKS                            NUMBER
 AVG_SPACE                               NUMBER
 CHAIN_CNT                               NUMBER
 AVG_ROW_LEN                             NUMBER
 AVG_SPACE_FREELIST_BLOCKS               NUMBER
 NUM_FREELIST_BLOCKS                     NUMBER
 DEGREE                                  VARCHAR2(10)
 INSTANCES                               VARCHAR2(10)
 CACHE                                   VARCHAR2(5)
 TABLE_LOCK                              VARCHAR2(8)
 SAMPLE_SIZE                             NUMBER
 LAST_ANALYZED                           DATE
 PARTITIONED                             VARCHAR2(3)
 IOT_TYPE                                VARCHAR2(12)
 TEMPORARY                               VARCHAR2(1)
 SECONDARY                               VARCHAR2(1)
 NESTED                                  VARCHAR2(3)
 BUFFER_POOL                             VARCHAR2(7)
 ROW_MOVEMENT                            VARCHAR2(8)
 GLOBAL_STATS                            VARCHAR2(3)
 USER_STATS                              VARCHAR2(3)
 DURATION                                VARCHAR2(15)
 SKIP_CORRUPT                            VARCHAR2(8)
 MONITORING                              VARCHAR2(3)
 CLUSTER_OWNER                           VARCHAR2(30)
 DEPENDENCIES                            VARCHAR2(8)
 COMPRESSION                             VARCHAR2(8)
 DROPPED                                 VARCHAR2(3)

SQL>
SQL> -- create demo table
SQL> create table Employee(
  2    ID                 VARCHAR2(4 BYTE)         NOT NULL,
  3    First_Name         VARCHAR2(10 BYTE),
  4    Last_Name          VARCHAR2(10 BYTE),
  5    Start_Date         DATE,
  6    End_Date           DATE,
  7    Salary             Number(8,2),
  8    City               VARCHAR2(10 BYTE),
  9    Description        VARCHAR2(15 BYTE)
 10  )
 11  /

Table created.

SQL>
SQL> -- prepare data
SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2               values ('01','Jason',    'Martin',  to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto',  'Programmer')
  3  /

1 row created.

SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2                values('02','Alison',   'Mathews', to_date('19760321','YYYYMMDD'), to_date('19860221','YYYYMMDD'), 6661.78, 'Vancouver','Tester')
  3  /

1 row created.

SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2                values('03','James',    'Smith',   to_date('19781212','YYYYMMDD'), to_date('19900315','YYYYMMDD'), 6544.78, 'Vancouver','Tester')
  3  /

1 row created.

SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2                values('04','Celia',    'Rice',    to_date('19821024','YYYYMMDD'), to_date('19990421','YYYYMMDD'), 2344.78, 'Vancouver','Manager')
  3  /

1 row created.

SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)
  2                values('05','Robert',   'Black',   to_date('19840115','YYYYMMDD'), to_date('19980808','YYYYMMDD'), 2334.78, 'Vancouver','Tester')
  3  /

1 row created.

SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
  2                values('06','Linda',    'Green',   to_date('19870730','YYYYMMDD'), to_date('19960104','YYYYMMDD'), 4322.78,'New York',  'Tester')
  3  /

1 row created.

SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
  2                values('07','David',    'Larry',   to_date('19901231','YYYYMMDD'), to_date('19980212','YYYYMMDD'), 7897.78,'New York',  'Manager')
  3  /

1 row created.

SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
  2                values('08','James',    'Cat',     to_date('19960917','YYYYMMDD'), to_date('20020415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester')
  3  /

1 row created.

SQL>
SQL>
SQL>
SQL> -- display data in the table
SQL> select * from Employee
  2  /

ID   FIRST_NAME LAST_NAME  START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01   Jason      Martin     25-JUL-96 25-JUL-06    1234.56 Toronto    Programmer
02   Alison     Mathews    21-MAR-76 21-FEB-86    6661.78 Vancouver  Tester
03   James      Smith      12-DEC-78 15-MAR-90    6544.78 Vancouver  Tester
04   Celia      Rice       24-OCT-82 21-APR-99    2344.78 Vancouver  Manager
05   Robert     Black      15-JAN-84 08-AUG-98    2334.78 Vancouver  Tester
06   Linda      Green      30-JUL-87 04-JAN-96    4322.78 New York   Tester
07   David      Larry      31-DEC-90 12-FEB-98    7897.78 New York   Manager
08   James      Cat        17-SEP-96 15-APR-02    1232.78 Vancouver  Tester

8 rows selected.

SQL>
SQL>
SQL> SELECT table_name, tablespace_name, temporary
  2  FROM user_tables
  3  WHERE table_name IN ('EMPLOYEE');

TABLE_NAME                     TABLESPACE_NAME                T
------------------------------ ------------------------------ -
EMPLOYEE                       SYSTEM                         N

SQL>
SQL>
SQL> -- clean the table
SQL> drop table Employee
  2  /

Table dropped.

SQL>
SQL>








30.105.user_tables
30.105.1.Find out the names of the tables you own
30.105.2.Getting Information on Tables
30.105.3.Getting a list of your own tables
30.105.4.Create disable trigger command by querying user_triggers table
30.105.5.Query user_tables for a table name