Describe statement How-To

Hello,
if i have a database, and i need to find out which tables are
included, how would i do it.
Assuming that i don't know anything about the database.
Also, if I have a table in database, and when I issue a
describe table_name, table description is so long that it
scrolls a few pages. How would I
a) pause it in the middle of describing it.
b) output responce to a file
i.e. describe table_name > file
Thanks
Alex
null

Alex Korneyev (guest) wrote:
: Hello,
: if i have a database, and i need to find out which tables
are
: included, how would i do it.
select * from cat;
it prints out all the tables that belong to user you log in as.
: Assuming that i don't know anything about the database.
: Also, if I have a table in database, and when I issue a
: describe table_name, table description is so long that it
: scrolls a few pages. How would I
: a) pause it in the middle of describing it.
in SQL*Plus
set pause on
or just use Linux console's Shift+PgUp/PgDown. It also works with
xterm.
: b) output responce to a file
: i.e. describe table_name > file
spool file.name
All the work session will be logged into file.name
: Thanks
: Alex
null

Similar Messages

Describe statement in abap

how to use this descibe statement.can any one please explain me with example

Hi Rajeev, write Describe and press F1 in the ABAP editor..u ll get the different functionalities for describe..
this is one of them
DESCRIBE - Return attributes of an internal table
Basic form
DESCRIBE TABLE itab.
Effect
Returns the attributes of the internal table itab. You must use at least one of the additions listed below:
Note
The DESCRIBE statement cannot be used for all ABAP types. In connection with ABAP Objects, SAP has introduced a RTTI concept based on system classes to determine type attributes at runtime. This concept applies to all ABAP types and as such covers all the functions of the DESCRIBE TABLE statement.
Extras:
1. ... LINES n
2. ... OCCURS n
3. ... KIND   k
Addition 1
... LINES n
Effect
Places the number of filled lines of the table t in the field lin. The value returned to lin has type I.
Note
The number of filled lines of the table itab can also be ascertained using the predefined function lines( itab ).
Example
DATA: N    TYPE I,
      ITAB TYPE TABLE OF I.
CLEAR ITAB.
APPEND 36 TO ITAB.
DESCRIBE TABLE ITAB LINES N.
Result: N contains the value 1.
Addition 2
... OCCURS n
Effect
Passes the size of the OCCURS parameter from the table definition (as defined with DATA) to the variable n. The value returned to n has type I.
Example
DATA: N1    TYPE I,
      N2    TYPE I,
      ITAB1 TYPE TABLE OF I INITIAL SIZE 10,
      ITAB2 TYPE I OCCURS 5.
DESCRIBE TABLE ITAB1 OCCURS N1.
DESCRIBE TABLE ITAB2 OCCURS N2.
Result: OCC contains the value 10 and N2 the value 5.
Addition 3
... KIND k
Effect
Writes the table type from itab to the variables n. The value returned to k is of type C. The constants SYDES_KIND-STANDARD, SYDES_KIND-SORTED and SYDES_KIND-HASHED are defined in the type group SYDES for the return values.
Example
Generic FORM routine any table type
TYPE-POOLS: SYDES.
FORM GENERIC_FORM USING ITAB TYPE ANY TABLE.
DATA: K TYPE C.
DESCRIBE TABLE ITAB KIND K.
CASE K.
    WHEN SYDES_KIND-STANDARD.
    WHEN SYDES_KIND-SORTED.
    WHEN SYDES_KIND-HASHED.
ENDCASE.
ENDFORM.
Notes
Performance: The runtime for executing the DESCRIBE TABLE statement is approximately 4 msn (standardized microseconds).
The DESCRIBE TABLE statement also passes values to the SY-TFILL and SY-TLENG System fields
Additional help
Determining the Attributesof Internal Tables

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Oracle Describe Statement and CGI

Hello,
First of all,
I would like to thank everyone that helped me out. It really
made my much easier.
Second,
General Question.
describe command in Oracle will display a specified table's
definition.
Now, I have a CGI program that will execute any SQL statement
that has to do with tables on Oracle Database.
i.e. select , update, insert, delete. Now when I tried
describe student, i got an error (in httpd error log file:
"invalid SQL statement". why?
here is a code from my program,
assuming: $fields{'sqlString'} = describe student
$sth = $dbh->prepare($fields{'sqlString'})
$sth->execute;
Thanks Alex
null

Matt Surico (guest) wrote:
: Alex Korneyev (guest) wrote:
: {snip}
: : General Question.
: : describe command in Oracle will display a specified table's
: : definition.
: : Now, I have a CGI program that will execute any SQL
statement
: : that has to do with tables on Oracle Database.
: : i.e. select , update, insert, delete. Now when I tried
: : describe student, i got an error (in httpd error log file:
: : "invalid SQL statement". why?
: : here is a code from my program,
: : assuming: $fields{'sqlString'} = describe student
: : $sth = $dbh->prepare($fields{'sqlString'})
: : $sth->execute;
: : Thanks Alex
: "describe" is a SQL*Plus command, not a SQL command. Other
: SQL*Plus commands are column, spool, ttitle, etc...
: If the Oracle user by which you execute the CGI above has
access
: to the data dictionary, you can issue the following command:
: SELECT column_name, nullable, data_type, data_length
: FROM dba_tab_columns
: WHERE table_name = 'STUDENT'
: AND owner = '{fill in the owner name in CAPS}'
: If the Oracle user in your CGI doesn't have full access to the
: data dictionary, you or the DBA could minimally grant SELECT on
: DBA_TAB_COLUMNS to that user.
: Hope that helps!
: Matt Surico
: Oracle 7.3 Certified DBA
Thanks, that helps.
Speaking of permissions. How do i set permissions for a user?
acctually add user? for testing my CGI i am using orcl database
with scott/tiger permissions. How do i view user's permissions?
Also, I have this weird problem. Well I know the anser to it,
but i need a way to go around it. Here it goes.
Assuming following:
alextable = (fname char (20), lname char(20))
If I do the following from within SQL/Plus
insert into alextable values('Alex','Was Here');
then select * from alextable, i can see it. BUT if i do the same
thing from CGI, I won't see, until i quit SQL/Plus. But if i
issue the same command from CGI script and then do "select"
statement, I will see the changes from SQL/Plus and CGI levels.
I know that some databases use that as a "Rollback" feature.
Is ther anyway to modify, maybe user permissions, or something
else,so i would be able to see changes right away, no matter
where i make them.
thanks
alex
null

Service remains in "offline*" state - how to reset it?

Hello.
Since two days ago, I've got a problem with one of the sevices on a S10 Sparc system.
--($:~)-- svcs -a | grep \*
offline*       Jan_08   svc:/application/oracle/database:RACE002
--($:~)-- svcs -xv svc:/application/oracle/database:RACE002
svc:/application/oracle/database:RACE002 (Oracle database)
State: offline since 8. Januar 2008 03:43:55 CET
Reason: Start method is running.
   See: http://sun.com/msg/SMF-8000-C4
   See: man -M /usr/share/man -s 5 ora-smf
   See: /var/svc/log/application-oracle-database:RACE002.log
Impact: This service is not running.
--($:~)-- tail /var/svc/log/application-oracle-database:RACE002.log
database RACE002 is OPEN.
[ Jan 7 03:41:45 Method "start" exited with status 0 ]
[ Jan 8 03:42:52 Stopping because service disabled. ]
[ Jan 8 03:42:52 Executing stop method ("/lib/svc/method/ora-smf stop database RACE002") ]
Database closed.
Database dismounted.
ORACLE instance shut down.
[ Jan 8 03:43:00 Method "stop" exited with status 0 ]
[ Jan 8 03:43:54 Enabled. ]
[ Jan 8 03:43:55 Executing start method ("/lib/svc/method/ora-smf start database RACE002") ]Ie., the service is in "offline*" since Jan 8.
How do I get the service to change into any other different state, be it "online", "maintenance" or "offline"?
--($:~)-- svcs -xv svc:/application/oracle/database:RACE002
svc:/application/oracle/database:RACE002 (Oracle database)
State: offline since 8. Januar 2008 03:43:55 CET
Reason: Start method is running.
   See: http://sun.com/msg/SMF-8000-C4
   See: man -M /usr/share/man -s 5 ora-smf
   See: /var/svc/log/application-oracle-database:RACE002.log
Impact: This service is not running.
--($:~)-- sudo svcadm disable svc:/application/oracle/database:RACE002
--($:~)-- svcs -xv svc:/application/oracle/database:RACE002
svc:/application/oracle/database:RACE002 (Oracle database)
State: offline since 8. Januar 2008 03:43:55 CET
Reason: Start method is running.
   See: http://sun.com/msg/SMF-8000-C4
   See: man -M /usr/share/man -s 5 ora-smf
   See: /var/svc/log/application-oracle-database:RACE002.log
Impact: This service is not running.
--($:~)-- svcs svc:/application/oracle/database:RACE002
STATE          STIME    FMRI
offline*       Jan_08   svc:/application/oracle/database:RACE002
--($:~)-- sudo svcadm mark maintenance svc:/application/oracle/database:RACE002
--($:~)-- svcs svc:/application/oracle/database:RACE002
STATE          STIME    FMRI
offline*       Jan_08   svc:/application/oracle/database:RACE002
--($:~)-- sudo svcadm clear svc:/application/oracle/database:RACE002
svcadm: Instance "svc:/application/oracle/database:RACE002" is not in a maintenance or degraded state.
--($:~)-- sudo svcadm refresh svc:/application/oracle/database:RACE002
--($:~)-- svcs svc:/application/oracle/database:RACE002
STATE          STIME    FMRI
offline*       Jan_08   svc:/application/oracle/database:RACE002
--($:~)-- sudo svcadm restart svc:/application/oracle/database:RACE002
--($:~)-- svcs svc:/application/oracle/database:RACE002
STATE          STIME    FMRI
offline*       Jan_08   svc:/application/oracle/database:RACE002 Note: I'm not looking for an answer on how to make the oracle database RACE002 be available again. That can easily be done as "oracle" OS user and using "sqlplus" to send a "startup" command.
I'm looking for a way to make SMF behave again. Because right now, I cannot use SMF to change the state of the service, which is a problem, as my backup scripts fail because of that :/
Thanks a lot,
Michael

Hello again Michael, would you be able to post the output of the following procedure?
4:41pm cmdrkeen@crossfire /research #>svccfg
svc:> select network/ssh
svc:/network/ssh> listprop(except obviously with your service rather than SSH)

Timer event doesn't listen to my if else statements how do stop it?

So I'm building a random generator of just a vector that i imported into flash and everything works just fine, almost. I added a timer to the creation of the vector. I also have some if else statements that are going to govern User Input. I realized that if the UI was initially outside of the parameters i've set it runs fine but once the once the function with the timer starts it never stops regardless of whether or not the UI is in the parameters I set. How do I stop the function when the UI is not what i want it to be?
Heres my code:
//initial universal variable declaration
var kface:Kobbyface;
var UI:Number;
var kfacex:Number;
var kfacey:Number;
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trace (inputnumber);
//eventlistener for click
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createfaces();
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Auto task - Gather Stats.How do Oracle knows which DB objects to analyze ?

Hi,
Do oracle has any specific criteria while identifying which Oracle DB objects needs to be analyze as part of Gather Stats ( included as "auto task") ?
Does it uses information from DBA_TAB_MODIFICATIONS to find any fixed % of change like 10% or so or it analyzes all objects ?

Copied and pasted from the documentation, which you can find via some simple Google searches if you don't know about http://docs.oracle.com
GATHER AUTO: Gathers all necessary statistics automatically. Oracle implicitly determines which objects need new statistics, and determines how to gather those statistics. When GATHER AUTO is specified, the only additional valid parameters are stattab,statid, objlist and statown; all other parameter settings are ignored. Returns a list of processed objects.
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GATHER EMPTY: Gathers statistics on objects which currently have no statistics. Return a list of objects found to have no statistics.
14.2.1 GATHER_STATS_JOB
Optimizer statistics are automatically gathered with the job GATHER_STATS_JOB. This job gathers statistics on all objects in the database which have:
Missing statistics
Stale statistics

DESCRIBE statement

Dear all,
I m simply trying to get the length of a variable and written the following code.
DATA : var(20) type c,
len type i.
describe field var length len.
write : /len.
But it giving an error : In Unicode DESCRIBE length can only be used with the IN BYTE MODE or IN CHARACTER MODE addition.
Can any one suggest some solution.
Regards,
Maverick

Describe is used to describe length of a field & how many number of lines for an internal table.
in case of field we have to provide in which format we have to read i.e. Character or Binary
in case of Internal Table no need to provide these things it will directly write number of lines to our field type integer.
*For Field
DESCRIBE FIELD dobj LENGTH ilen IN {BYTE|CHARACTER} MODE .
for more information go to F1 help
*For Internal Table
data:ivbap type standard table of <any table>,
da_tfill type i.
describe table ivbap lines da_tfill

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Help with describe statement

Hi,
does both the statements gives the same results or it depends on anything
DESCRIBE FIELD Itab LENGTH LEN IN byte MODE.
DESCRIBE FIELD Itab LENGTH LEN IN CHARACTER MODE.
thanks

See the below information :
LENGTH ilen IN { BYTE | CHARACTER } MODE
Effect
The length directly used by the data object dobj in the memory is determined in bytes or characters depending on the addition MODE and is assigned to the data object ilen. The data type i is expected for ilen.
You must specify the addition MODE in Unicode programs. The variant with the addition IN BYTE MODE determines the length of the data object dobj in bytes. The variant with the addition IN CHARACTER MODE determines the length of the data object dobj in characters. When using IN CHARACTER MODE, the data type of dobj must be flat and character-type. You can only specify IN BYTE MODE for deep data types and in this case, the length of the reference (8 bytes) is determined.
In non-Unicode programs and in releases prior to 6.10, LENGTH can be used without the addition MODE. In this case, the addition IN BYTE MODE is used implicitly
Note
For data objects with a fixed length, the length is determined that is specified during the creation of the data object. To determine the the used length of character-type data objects without counting the trailing spaces, you can use the built-in function strlen.
Example
Calculation of bytes required for the display of one character. The result is greater than 1 in multi-byte systems. .
DATA: text(1) TYPE c,
      blen TYPE i,
      clen TYPE i,
      bytes TYPE i.
DESCRIBE FIELD text: LENGTH blen IN BYTE MODE,
                     LENGTH clen IN CHARACTER MODE.
bytes = blen / clen.

CFQuery with an IN statement (how do you do it)

I have a <cfquery> SQL statement with a 'where in ( )'
clause but quotedValueList can't handle values greater than 1000,
so, how do you do it?
Now, I can't just stick the first query into the second query
to make it work. The first query is more complicated than the
example I gave so that's why I have to break them up. So, how would
I make the second query work if the first query returned 2000
students?
<cfquery name="getStudents" datasource="Oracle">
select pk1
from users
group by pk1
</cfquery>
<cfquery name="getStudentCourses" datasource="Oracle">
select course_id
from course_users
where users_pk1 in (......)
</cfquery>

Well, here is one "method", although it is a major kludge.
You just create a series of OR statements in your 2nd query based
on the number of items returned from your first query. Not elegant
or efficient, but it is strictly "ColdFusion".
<cfquery name="getStudents" datasource="Oracle">
SELECT pk1
FROM users
GROUP BY pk1
</cfquery>
<cfquery name="getStudentCourses" datasource="Oracle">
SELECT course_id
FROM course_users
WHERE 1=0
<cfoutput query="getStudents">
OR users_pk1 = #pk1#
</cfoutput>
</cfquery>
Of course, now you may have a query with 2000 OR lines in it,
so your query might run a little slowly the more items you select
from the first query.
Phil

My mail reverted to a pre-configured state - how do I recover?

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the first time you start Mail after TM restore it should tell you that it needs to import messages. You have to say yes. If you say "No", I think it dumps the existing mail preference file and starts anew. is this what you did?
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Prepard statement how to set default value to specific place holder

hi all
i have a prepared statement in that, to second place holder (or dollar ) i want to
assign a default value. can i do that
if yes, how ?

Ummm... the placeholders in prepared statements are question marks, not dollars.
http://java.sun.com/j2se/1.5.0/docs/api/java/sql/PreparedStatement.html
And no, there's no "default" features in the API.
For every placeholder, you have to set a value, and that value will remain in place until another set, even if the preparedstatement has been executed since the last set.
You need to do your own defaulting explicitly, with if or other conditional coding.
A totally different approach to default values is possible with at least most databases; when the table is created, or thereafter, you can specify a default value for a column. However, this will only be applied on INSERT of new rows, and only when the INSERT statement doesn't have a value (including a NULL value) for that column. That might not work for you.

Describe statement How-To

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