Oracle PL/SQL/Table/Describe
Содержание
Check the view structure
SQL>
SQL>
SQL>
SQL> create table emp(
2 emp_id integer primary key
3 ,lastname varchar2(20) not null
4 ,firstname varchar2(15) not null
5 ,midinit varchar2(1)
6 ,street varchar2(30)
7 ,city varchar2(20)
8 ,state varchar2(2)
9 ,zip varchar2(5)
10 ,shortZipCode varchar2(4)
11 ,area_code varchar2(3)
12 ,phone varchar2(8)
13 ,company_name varchar2(50));
Table created.
SQL>
SQL>
SQL> insert into emp(emp_id,lastname,firstname,midinit,street,city,state,zip,shortZipCode,area_code,phone,company_name)values
2 (1,"Jones","Joe","J","1 Ave","New York","NY","11202","1111","212", "221-4333","Big Company");
1 row created.
SQL> insert into emp(emp_id,lastname,firstname,midinit,street,city,state,zip,shortZipCode,area_code,phone,company_name)values
2 (2,"Smith","Sue","J","1 Street","New York","NY","11444","1111","212", "436-6773","Little Company");
1 row created.
SQL> insert into emp(emp_id,lastname,firstname,midinit,street,city,state,zip,shortZipCode,area_code,phone,company_name)values
2 (3,"X","Peggy","J","1 Drive","New York","NY","45502","2222","212", "234-4444","Medium Company");
1 row created.
SQL>
SQL> create or replace view phone_list as
2 select emp_id, firstname || " " || midinit || ". " || lastname as name,
3 "(" || area_code || ")" || phone as telephone#
4 from emp;
View created.
SQL>
SQL>
SQL>
SQL> desc phone_list
Name Null? Type
----------------------------------------------------------------------------------------------------- -------- --------------------------------------------------------------------
EMP_ID NOT NULL NUMBER(38)
NAME VARCHAR2(39)
TELEPHONE# VARCHAR2(13)
SQL> select * from phone_list;
EMP_ID NAME TELEPHONE#
---------- --------------------------------------- -------------
1 Joe J. Jones (212)221-4333
2 Sue J. Smith (212)436-6773
3 Peggy J. X (212)234-4444
3 rows selected.
SQL>
SQL> drop view phone_list;
View dropped.
SQL>
SQL> drop table emp;
Table dropped.
describe a procedure
SQL>
SQL> describe dbms_output
PROCEDURE DISABLE
PROCEDURE ENABLE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
BUFFER_SIZE NUMBER(38) IN DEFAULT
PROCEDURE GET_LINE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
LINE VARCHAR2 OUT
STATUS NUMBER(38) OUT
PROCEDURE GET_LINES
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
LINES TABLE OF VARCHAR2(32767) OUT
NUMLINES NUMBER(38) IN/OUT
PROCEDURE GET_LINES
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
LINES DBMSOUTPUT_LINESARRAY OUT
NUMLINES NUMBER(38) IN/OUT
PROCEDURE NEW_LINE
PROCEDURE PUT
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
A VARCHAR2 IN
PROCEDURE PUT_LINE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
A VARCHAR2 IN
SQL>
SQL>
describe user_tables
SQL>
SQL>
SQL> describe 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)
Show the table structure
SQL>
SQL> create table employee_history ( employee_id number(6) not null,
2 salary number(8,2),
3 hire_date date default sysdate,
4 termination_date date,
5 termination_desc varchar2(4000),
6 constraint emphistory_pk
7 primary key (employee_id, hire_date)
8 );
Table created.
SQL> describe employee_history;
Name Null? Type
------------------------------------------- -------- -------------
EMPLOYEE_ID NOT NULL NUMBER(6)
SALARY NUMBER(8,2)
HIRE_DATE NOT NULL DATE
TERMINATION_DATE DATE
TERMINATION_DESC VARCHAR2(4000)
SQL>
SQL> drop table employee_history;