SQL*Plus cheat sheet

Hi,
I was wondering if someone had a SQL*Plus cheat sheet similar to the ones which exist for Emacs, Vi or bash where are detailed the most used commands and advanced ones and wanted to share it with us.
Thanks.

I was looking for one which had a cheat-sheet-like format as the Linux ones but your link is also useful.
Thanks.

Similar Messages

Oracle Cheat Sheet

I made this Oracle cheat sheet as I see so many questions about starting and stoping Oracle:
Oracle URL Links
Oracle Enterprise Manager: http://host.domain:5500/em/
Oracle IsqlPlus Manager: http://host.domain:5560/isqlplus
Oracle IsqlPlus Manager DBA : http://host.domain:5560/isqlplus/dba
Oracle UltraSearch : http://host.domain:5620/ultrasearch
Oracle UltraSearch Admin : http://host.domain:5620/ultrasearch/admin
Oracle HTMLDB : http://host.domain:7777/pls/htmldb/htmldb
Oracle Apache : http://host.domain:7777
Stopping/Starting Oracle Database
Enter the following commands to shut down the instance:
1.     $ sqlplus /nolog
2.     SQL> CONNECT SYS/sys_password as SYSDBA
3.     SQL> SHUTDOWN NORMAL
1.     Enter the following commands to start the instance:
2.     $ sqlplus /nolog
3.     SQL> CONNECT SYS/sys_password as SYSDBA
4.     SQL> STARTUP
Stopping/Starting Oracle Net Listener
1.     Enter the following command to stop the Oracle Net listener:
$ $ORACLE_HOME/bin/lsnrctl stop listenername
1.     Enter the following command to start the Oracle Net listener:
     $ $ORACLE_HOME/bin/lsnrctl start [listenername]
Stopping/Starting iSQL*Plus
1.     Enter the following command to stop iSQL*Plus:
$ $ORACLE_HOME/bin/isqlplusctl stop
1.     Enter the following command to start iSQL*Plus:
$ $ORACLE_HOME/bin/isqlplusctl start
Stopping/Starting Oracle Ultra Search
1.     Enter the following command to stop Oracle Ultra Search:
     $ $ORACLE_HOME/bin/searchctl stop
1.     Enter the following command to start Oracle Ultra Search:
     $ $ORACLE_HOME/bin/searchctl start
Stopping/Staring Enterprise (EM) Database Control
1.     Enter the following command to stop the Database Control:
     $ $ORACLE_HOME/bin/emctl stop dbconsole
1.     Enter the following command to start the Database Control:
$ $ORACLE_HOME/bin/emctl start dbconsole
Stopping/Starting Oracle Management Agent
1.     Enter the following command to stop Oracle Management Agent:
     $ $ORACLE_HOME/agent/bin/emctl stop agent
1.     Enter the following command to start Oracle Management Agent:
     $ $ORACLE_HOME/agent/bin/emctl start agent

This is a really good list.
A couple things, I have on my cheat sheet are the following:
LSNRCTL STATUS listenername
EMCTL STATUS DBCONSOLE
And information about how to set the Oracle environment, so that the commands work. We have the environment settings in script files.

Cheat sheet for Oracle

I made this cheat sheet and wanted to share it as I see many questions about starting and stoping Oracle:
Oracle URL Links
Oracle Enterprise Manager: http://host.domain:5500/em/
Oracle IsqlPlus Manager: http://host.domain:5560/isqlplus
Oracle IsqlPlus Manager DBA : http://host.domain:5560/isqlplus/dba
Oracle UltraSearch : http://host.domain:5620/ultrasearch
Oracle UltraSearch Admin : http://host.domain:5620/ultrasearch/admin
Oracle HTMLDB : http://host.domain:7777/pls/htmldb/htmldb
Oracle Apache : http://host.domain:7777
Stopping/Starting Oracle Database
Enter the following commands to shut down the instance:
1.     $ sqlplus /nolog
2.     SQL> CONNECT SYS/sys_password as SYSDBA
3.     SQL> SHUTDOWN NORMAL
1.     Enter the following commands to start the instance:
2.     $ sqlplus /nolog
3.     SQL> CONNECT SYS/sys_password as SYSDBA
4.     SQL> STARTUP
Stopping/Starting Oracle Net Listener
1.     Enter the following command to stop the Oracle Net listener:
$ $ORACLE_HOME/bin/lsnrctl stop listenername
1.     Enter the following command to start the Oracle Net listener:
     $ $ORACLE_HOME/bin/lsnrctl start [listenername]
Stopping/Starting iSQL*Plus
1.     Enter the following command to stop iSQL*Plus:
$ $ORACLE_HOME/bin/isqlplusctl stop
1.     Enter the following command to start iSQL*Plus:
$ $ORACLE_HOME/bin/isqlplusctl start
Stopping/Starting Oracle Ultra Search
1.     Enter the following command to stop Oracle Ultra Search:
     $ $ORACLE_HOME/bin/searchctl stop
1.     Enter the following command to start Oracle Ultra Search:
     $ $ORACLE_HOME/bin/searchctl start
Stopping/Staring Enterprise (EM) Database Control
1.     Enter the following command to stop the Database Control:
     $ $ORACLE_HOME/bin/emctl stop dbconsole
1.     Enter the following command to start the Database Control:
$ $ORACLE_HOME/bin/emctl start dbconsole
Stopping/Starting Oracle Management Agent
1.     Enter the following command to stop Oracle Management Agent:
     $ $ORACLE_HOME/agent/bin/emctl stop agent
1.     Enter the following command to start Oracle Management Agent:
     $ $ORACLE_HOME/agent/bin/emctl start agent

A suggestion: Please mention the oracle version numbers where these commands are applicable.

Can we use xml Publisher reporting for sql* Plus in EBS

Hello All,
The current report is designed in Sql* Plus Executable report and the output is in txt format, Now the requirement is to have the output in Excel format.
So is it possible to use the xml reporting and make the output as Excel from the word template we design from MSword as we do for rdf(I have done few reports created in rdf to xml publisher reports in EBS and stand alone as well.).
Do the same procedure will suit for Sql*Plus reports tooo or Is there any work around to achieve this.
Thanks and Regards
Balaji.

Hi
Thanks for the reply..
I tried to do the follwoing
1. changed the output to xml in the conc. prog.
2. ran the same report but i am getting the follwoing error in the output file
The XML page cannot be displayed
Cannot view XML input using style sheet. Please correct the error and then click the Refresh button, or try again later.
Invalid at the top level of the document. Error processing resource
Other reports which are using the Oracle Reports(rdf) as source, i am able to generated the xml as expected....
So my question is whether we can use sql* reports executable and generate xml in the conc.prog.
if any one has used the sql*reports for xml publisher reporting... please let me know, so that if its possible i will check my sql needs some validation or tuning...
thanks in advance
Balaji.

APEX cheat sheet

It there a cheat sheet for building APEX apps?
A review of some code snippets shows x$ and calls to, :pxx and flows, and other syntax that I'm trying to understand.
So, I'm trying to figure out if this is a hybrid of PL/SQL and if so, what is the language structure, how to declare functions, vars, etc...
Thanks,
P.S. Yes, I've d'l'd the 2 day+ app express guide...

I've used this one before (not mine):
[http://tunahuntress.files.wordpress.com/2008/05/apex_cheatsheet_k08.pdf]
Regards
Richard

Process points cheat sheet

Hi Folks,
Is there a cheat sheet, overview page for all process points,
including 'proces points' like authentication, vpd sections, authorization schemes,
setting application items, etc etc ?
I know much can be seen in the debug output, and using wwv_flow.debug calls, but
perhaps someone already put it together in a sheet.
Thanks in advance,
Art

Art,
That is correct.
As to the specific points:
Application items are just like page items. Binding occurs at the point they are used (when SQL is parsed).
The VPD block is executed very early in the show or accept request, right after APP_USER is ascertained.
Authorization schemes are evaluated when the page/application components that use them are encountered. Then they are evaluated again only if their Evaluation Point is Once per Page View and the same component is accessed again in another page view.
Scott

REPORT generating dilema SQL plus, SQL worksheet, SQL developer, when to yo

hi i am always generating report for my company into excel sheet..
and i encoutner a scenario where by i need to do a
BREAK ON col skip 1 command.
now i am wondering..
1) i am using sql developer to export the report into excel sheet everytime. and ihave tried using the break on col skip 1 command, it will not work on sql developer.
if i run it in a script [F5] i cannot export the data in excel..
2) if i use sql*plus to do the report, i wont not be able to see all the columns in 1 straight row..
even though i have set the linesize to the maximum..my tables has too many columns..
2nd , can sql*plus generate excel file?
3) what is the difference between sqlworksheet and sqlplus, does oracle10g still support sqlworksheet? i cant seem to find it in oracle10g
4) somehow i feel certain mechanism inside sqldeveloper sqlworksheet are the same of sqlplus,
anybody has a clue?
thats all 10s

SQL Worksheet is no longer supported.
The SQL Developer team are trying to make the worksheet in SQLDeveloper compatible with sqlplus, but they have some way to go.
SQL*Plus can't generate excel files directly, but you can use 'set colsep ,' to get a comma separated file of sorts.
The maximum linesize in sqlplus is 32767. Are you sure you need all that information in one line?
You may need to look at better report writers such as Apex or Oracle reports, or use MSQuery to pull the data directly into Excel.

IF statement in SQL*Plus - how to do it

Hi,
In SQL*Plus script, I would like to keep conditional checking (IF statement) and proceed. For example, whatever is done in PL/SQL block below, want to do the same in SQL*Plus script, I know partly it can be done using VARIABLE keyword, conditional checking can be done using DECODE in SELECT statement, but I want to carry out a more complex requirement, hence I want to use IF statement somehow in SQL*Plus.
Another question, how to do spooling in PL/SQL script, it can be done using UTL_FILE, any other option is there to achieve this.
declare
v_ind_count int;
begin
select count(1) into v_ind_count from user_indexes where index_name = 'index_object_name';
IF v_ind_count > 0
THEN
dbms_output.put_line('index found');
ELSE
dbms_output.put_line('index does not exist');
END IF;
end;
/

Hello,
SQL*PLUS has no scripting language. It can only execute SQL and PL/SQL scripts. There are some commands like SPOOL or SET but no commands for conditional statements. You should describe your requirements, maybe we can find a way.
Or you can search the forum, maybe your question has already been answered
[Google for SQL*PLUS + condition|https://www.google.de/search?q=site%3Aforums.oracle.com+"SQL*PLUS"+condition]
# {message:id=4189517}
# {message:id=4105290}
how to do spooling in PL/SQL scriptFrom within PL/SQL you can use dbms_output, the spool has to be started by the calling SQL script when it is executed in SQL*PLUS. Or you can use utl_file, but then you can only write to a server directory, not into a client file. To give an advice we need more information about what you want to do.
Regards
Marcus

Apex 4.0 - Can see view data in SQL*Plus but no data in Object Browser

Hi There,
I have just started using Apex 4.o and migrated some apps. I have an issue with a report, but see the same issue with Object browser, which is easier to describe.
I have a view:
create or replace view V_PLJ_USERDEF_CODES (
         CODE_SET_ID,
         CODE_SET_CODE,
         CODE_SET_DESC,
         CODE_ID,
         CODE_SYS_CODE,
         CODE_VALUE,
         CODE_DESC,
         DISPLAY_SEQ,
         DISPLAY_FLAG,
         LANGUAGE_CODE) as
select CS.CODE_SET_ID,
         CS.CODE_SET_CODE,
         CS.CODE_SET_DESC,
         C.CODE_ID,
         C.CODE_SYS_CODE,
         C.CODE_VALUE,
         C.CODE_DESC,
         C.DISPLAY_SEQ,
         C.DISPLAY_FLAG,
         C.LANGUAGE_CODE
    from PLJ_CODES C,
         PLJ_CODE_SETS CS
   where C.CODE_SET_ID         = CS.CODE_SET_ID
     and CS.CODE_SET_TYPE_CODE = SYS_CONTEXT('PLJUMPSTART','C_USERDEF_CODE_SET');This returns data in SQL*Plus, but no data in Object Browser OR report region based on this view.
Workspace parses in the same schema as tested in SQL*Plus.
If, in report, I swap out view, and use underlying table - no problem.
Any ideas -
thanks
P

Hi all,
Thanks for getting back so promptly.
It just seems weird to me, as tables are just fine, but not views.
In the underlying schema:
SQL> sho user
USER is "ICSREPORTING"
SQL> select count(*) from plj_codes;
COUNT(*)
       107
SQL> select count(*) from v_plj_userdef_codes;
COUNT(*)
        29And in the APEX schema
SQL> sho user
USER is "APEX_040000"
SQL> select count(*) from icsreporting.plj_codes;
select count(*) from icsreporting.plj_codes
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> select count(*) from icsreporting.v_plj_userdef_codes;
select count(*) from icsreporting.v_plj_userdef_codes
ERROR at line 1:
ORA-00942: table or view does not exist
SQL>However, in SQL browser, I can see the data in PLJ_CODES but in V_PLJ_USERDEF_CODES, just the message "This view has no data". Indeed, it is like this for all views.
I even explicitly granted access to APEX_040000 but no good.
In fact, I would like to know more about how Apex gets access to do DML against the underlying parsing schema(s).
This is a little frustrating though. It worked just fine in lots of apps in version 2.1 to 3.2
Am I missing something
paul
p.s I knew there would be a question about the context, but I had already checked that. :)
Edited by: PJ on Nov 19, 2010 4:09 AM

Can not query PQH_BUDGET_DETAILS in SQL*Plus

Hi!
I can see the Positions in the Forms-Mask within EBS.
I want to write a concurrent Programm which queries some data form the positions-table.
If i klick on "Help > Diagnostics > Examine" and select "system.last_query" i can see, that the data comes from a view called: "PQH_POS_BUDGETS_V".
But if i try to query this view in SQL*Plus, it is empty.
So i had a look at how this view is build, and i found, that the base tables should be PQH_BUDGETS and PQH_BUDGET_DETAILS.
How can i query the position_id in PQH_BUDGET_DETAILS in a concurrent program or an self-writen BI Publisher Report?
If i try to query in SQL*Plus it's empty.
Who can help me with this issue?
Thank you for your help!
Best regards,
Thomas

Hi!
Thats great!
Thank you very much!
Best regards,
Thomas

SQL*Plus - how to suppress the SQL in a spool file

This is my SQL*Plus script. I thought I had solved the problem, but it is back now and I don't know what I am missing. But I don't want the query at the top of the file.
SET SERVEROUTPUT ON
SET MARKUP HTML ON -SILENT
SET ECHO OFF
SET PAGESIZE 33
SET TERMOUT OFF
Spool C:\DuaneWilson.xls
SELECT *
FROM RPT_DS1_CNT_CAT_vw
WHERE ROWNUM <=100
ORDER BY CVBI_KEY;
SET MARKUP HTML OFF
SET ECHO ON
SET PAGESIZE 20
SET TERMOUT ON
SET SERVEROUTPUT OFF

It turns out when I run the script with the @ or Start with the file name, there is no SQL put out to the file. But when I just copy the text out of the file and run it at the prompt, the SQL appears in the output file. In reference to the -SILENT, I put that in after the MARKUP statement and got an error. Maybe I don't know where that goes. And I am not sure why there is a difference if it is run as a script or just pasted to the buffer. At least it should be the same in the output file, I would think.

Checking Module to Prevent SQL Plus usage on Database

I have a question regarding logon triggers checking against SYS_CONTEXT('USERENV', 'MODULE'). I created a logon trigger that looks for SYS_CONTEXT('USERENV', 'MODULE') = 'SQLPLUS.EXE'
and if it matches then it only allows specified users to log in to the database. This code works but I am confused as to why when I check SYS_CONTEXT('USERENV', 'MODULE') after I login in
shows SQL*Plus which clearly does not match my IF statement in my logon trigger.
Second issue. If I rename sqlplus.exe to jeff.exe and run it I am abled to log in to the database as a non DBA user. But the module still shows as SQL*Plus. Why is this?
Database Version: 11.2.0.2 64bit
OS: Windows Server 2003 R2
Client: 11.2.0.1
/*********************Create Trigger******************************/
CREATE OR REPLACE TRIGGER application_check_al
after logon ON database
DECLARE
l_username VARCHAR2(20);
l_module   VARCHAR2(20);
BEGIN
l_username := SYS_CONTEXT('USERENV', 'SESSION_USER');
l_module   := UPPER(SYS_CONTEXT('USERENV', 'MODULE'));
IF l_module LIKE 'SQLPLUS.EXE' AND
     l_username NOT IN ('SYS', 'SYSTEM', 'DVOWNER', 'DVMGR') THEN
    raise_application_error(-20001, 'SQLPLUS ACCESS RESTRICTED FOR NON DBA USERS');
END IF;
END application_check_al;
/*********************Run SQLPLUS******************************/
SQL*Plus: Release 11.2.0.1.0 Production on Wed Mar 7 12:22:23 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Enter user-name: jeffc@dev
Enter password:
ERROR:
ORA-00604: error occurred at recursive SQL level 1
ORA-20001: SQLPLUS ACCESS RESTRICTED FOR NON DBA USERS
ORA-06512: at line 10
Enter user-name: system@dev
Enter password:
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining, Oracle Database Vault
and Real Application Testing options
system@dev> select sys_context('USERENV','MODULE') from dual;
SYS_CONTEXT('USERENV','MODULE')
SQL*Plus
SQL>

jeff81 wrote:
That doesn't make sense. Why am I able to log in when I renamed the exe? And why does the module still show as SQL*Plus?You are right - it does not make sense. The idea that Oracle might perhaps set module to SQLPLUS.EXE on executable start, and then re set from SQLPLUS.EXE to SQL*Plus after connect, or in glogin.sql, to ensure it is consistent across all operating system never crossed my mind.
You might want to refer to Support Note "SQL*Plus Session/Module is Not Showing in V$SESSION" [ID 1312340.1] to see whether anything in there helps. I'm pretty sure http://docs.oracle.com/cd/E11882_01/server.112/e16604/ch_twelve040.htm#i2698573 doesn't help much, though.
I'd certainly be raising it with Support as a potential security challenge, to get that potential hole closed.
Edited by: Hans Forbrich on Mar 7, 2012 2:23 PM
I wonder whether Oracle put that capability in there - if an untained SQLPLUS.EXE, it tells you that it is SQLPLUS.EXE, but if renamed it tells you 'SQL*Plus'? Specuklation, but it is one thing I might do to subtly raise the flag. Best bet - ask Support.
Edited by: Hans Forbrich on Mar 7, 2012 2:29 PM

Cannot see table in sql developer or sql plus

I have created a record in application designer. I have then built the table. I can close the record and then find it again in application designer. But if I go to sql plus or sql developer, I cannot see it. Am I missing a step?

You probably can see all the tables of sysadm because someone else give you proper grant for that on existing sysadm's objects.
For the new or modified object (drop+create) you should :
1. connect as sysadm and run
grant select on new_table_name to your_own_user;2. connect with your own user and run
create synonym new_table_name for sysadm.new_table_name;Then you'll be able to query that table without using schema name alias.
Some admin have also a ddl trigger to make it automatically.
You could also work through a role and public synonym if more than one user needs to access sysadm's objects.
Nicolas.

Oracle10g Developer Suite - Application Development - SQL Plus Login Info

I have installed Oracle10g Developer Suite and when I am trying to login into the sql*plus environment the username scott with the passcode tiger is not working. I have Oracle9i Enterprise Edition Release 9.2.0.1.0 as the database.
Can anyone help me in setting up the username and password to login into Sql*plus Release 10.1.0.4.2

It sounds like you may be new to Oracle and its products. I would recommend doing some reading.
Oracle 9.2 Net Services Admin Guide
http://download-west.oracle.com/docs/cd/B10501_01/network.920/a96580/toc.htm
Oracle Developer Suite Installation Guide
http://download-west.oracle.com/docs/cd/B25016_06/doc/dl/core/B16012_03/toc.htm
You create the "login" information when you install the database. If you are not the person who performed the installation, you will need to contact them or install it again. Also, be aware that the SCOTT schema is disabled by default in newer database versions for security reasons.
The tnsnames.ora and sqlnet.ora files can be found in the ORACLE_HOME\network\admin directory. This is the same for all Oracle products that use Sql-Net for database connections. You can also use the TNS_ADMIN environment variable to point to a pre-existing tnsnames.ora file (see previously mentioned documents).
The tnsnames.ora entry will be unique to your database and its listener however here is an example:
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = someServer.com)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)

Oracle:JDBC Call returns no results, SQL*Plus returns 1 record, Please help

Any help would be greatly appreciated.
Running 9.2.0.5.0, and using latest 9.2 JDBC 1.4_g drivers in thin mode.
Execute the following query from SQL*Plus and it returns one row, from JDBC using a PreparedStatement, I get no results. Here's the query, table def, record, etc.:
Query:
SELECT
ID_WEB_FRM,ID_WEB_SIT,CDE_LVL_1_FUNC,
CDE_LVL_2_FUNC,NUM_WEB_FUNC_PG,NUM_WEB_PG_ID
FROM
WEB_FRM
WHERE
ID_WEB_FRM = ' '
OR
(ID_WEB_SIT = 'test' AND CDE_LVL_1_FUNC = ' '
AND CDE_LVL_2_FUNC = 'u2T' AND NUM_WEB_FUNC_PG = 1
AND NUM_WEB_PG_ID = 0)
Record returned from SQL*Plus:
ID_WEB_FRM ID_WEB_SIT CDE CDE NUM_WEB_FUNC_PG NUM_WEB_PG_ID
NfRRmc5XZu test u2T 1 0
Both in the data returned and the query, there are no blanks, but they are a single space instead (hard to see in message here).
Java code:
int count = 1;
findDBNameStatement.setString(count++," ");
findDBNameStatement.setString(count++,form.getSiteID());
findDBNameStatement.setString(count++," ");
findDBNameStatement.setString(count++, form.getFunctionID());
findDBNameStatement.setInt(count++,form.getPageNumber());
findDBNameStatement.setInt(count++,form.getSectionNumber());
ResultSet resultSet = findDBNameStatement.executeQuery();
ResultSetMetaData metaData = resultSet.getMetaData();
resultSet.next() returns false
DB table:
CREATE TABLE web_frm (
ID_WEB_FRM varchar2(10) NOT NULL,
ID_WEB_SIT varchar2(20) NOT NULL,
NAM_WEB_FRM varchar2(40),
TXT_EMAIL_SUBJ varchar2(50),
CDE_LVL_1_FUNC char(3),
CDE_LVL_2_FUNC char(3) NOT NULL,
NUM_WEB_FUNC_PG int NOT NULL,
NUM_WEB_PG_ID smallint NOT NULL,
DTE_WEB_FRM_EFF date NOT NULL,
DTE_WEB_FRM_TRM date,
CDE_VLDT_RUL char(3),
DTE_LAST_EXPRT date,
TXT_CNFRMN_MSG varchar2(4000),
IND_UPDT_ALWD char(1) NOT NULL,
TXT_RECAP_HDR varchar2(4000),
TXT_RECAP_FTR varchar2(4000),
CDE_WEB_OBJ char(3),
NUM_MAX_FRM_WIDTH number(4,0),
IND_RECAP_PG char(1) NOT NULL,
IND_CNFRM_PG char(1) NOT NULL,
IND_DSPL_CNFRM_NUM char(1) NOT NULL,
CNT_SUBM_MAX int,
TXT_CHCE_ADD_MSG varchar2(255),
TXT_CHCE_MOD_MSG varchar2(255),
TXT_WEB_HDR varchar2(4000),
TXT_WEB_FTR varchar2(4000),
TXT_WAIT_LIST_MSG varchar2(255),
FORMOBJECTHEIGHT int NOT NULL,
FORMOBJECTWIDTH int NOT NULL
ALTER TABLE web_frm ADD ( CONSTRAINT PK_web_frm PRIMARY KEY (ID_WEB_FRM));
ALTER TABLE web_frm ADD ( CONSTRAINT UK_web_frm UNIQUE (ID_WEB_SIT,CDE_LVL_1_FUNC,CDE_LVL_2_FUNC,NUM_WEB_FUNC_PG,NUM_WEB_PG_ID)) ;
Thanks,
Matt

That's not quite right. From the javadocs:
next
public boolean next()
throws SQLException
Moves the cursor down one row from its current position. A ResultSet cursor is initially positioned before the first row; the first call to the method next makes the first row the current row; the second call makes the second row the current row, and so on.
If an input stream is open for the current row, a call to the method next will implicitly close it. A ResultSet object's warning chain is cleared when a new row is read.
Returns:
true if the new current row is valid; false if there are no more rows
Throws:
SQLException - if a database access error occurs

SQL*Plus cheat sheet

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