Debugging PL/SQL blocks in SQL Developer
Is there any way to debug blocks of PL/SQL in SQL Developer by setting breakpoints in the code? I'm using SQL Developer.
I'm trying to debug some fairly complex PL/SQL blocks - they are not procedures or functions and so I'm unable to run them in debug mode.
p.s. Apologies should have posted this in the database forum really.
Edited by: Antilles on Sep 10, 2008 1:12 AM
Hello,
Sure you can, take a look at the following two links -
http://sueharper.blogspot.com/2006/07/remote-debugging-with-sql-developer_13.html
http://www.oracle.com/technology/oramag/oracle/08-may/o38browser.html
Hope this helps,
John.
http://jes.blogs.shellprompt.net
http://www.apex-evangelists.com
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Hello,
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I have used PL/SQL block in my custom report to search table heading. Basically I have two select list (LOV), user select the parameter from the list and click on go, it displays the report fine when record exists.
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>
DECLARE
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BEGIN
IF :P126_PARK_NAME IS NOT NULL THEN
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>
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>
DECLARE
v_sql VARCHAR2(4000);
BEGIN
IF :P126_PARK_NAME IS NOT NULL THEN
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||' from RTT_OP_PARKS_TEMP P, RTT_COMMERCIAL_OPERATORS C , RTT_PARTIES PA, RTT_OP_LICENCES L'
||' where '|| :P126_PARK_NAME || ' IS NOT NULL '
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Can anybody tell me what I am doing wrong here?
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Regards,
M TajuddinHi Andy,
Thanks for pointing the quotation however it does not work either. Now I am getting -
>
failed to parse SQL query:
ORA-00933: SQL command not properly ended
>
Now my query is like below -
>
DECLARE
v_sql VARCHAR2(4000);
BEGIN
IF :P126_ZONE_NAME IS NOT NULL THEN
v_sql := 'select distinct L.OLIC_KEY1, PA.NAME, C.TRADING_NAME, L.LIC_TYPE, M.'|| :P126_ZONE_NAME ||', C.COP_ID '
||' from RTT_OP_MARINE_PARKS M, RTT_COMMERCIAL_OPERATORS C , RTT_PARTIES PA, RTT_OP_LICENCES L'
||' where '|| :P126_ZONE_NAME || ' IS NOT NULL '
||' AND PA.PAR_ID =C.PAR_ID '
||' AND M.COP_ID =C.COP_ID '
||' AND L.OLIC_KEY1=M.OLIC_KEY1 '
||' AND :P126_QUERY = ''Y'''
||' ORDER BY PA.NAME ';
END IF;
IF :P126_MARINE_PARK IS NOT NULL THEN
v_sql := 'select distinct L.OLIC_KEY1, PA.NAME, C.TRADING_NAME, L.LIC_TYPE, M.'|| :P126_MARINE_PARK ||', C.COP_ID '
||' from RTT_OP_MARINE_PARKS M, RTT_COMMERCIAL_OPERATORS C , RTT_PARTIES PA, RTT_OP_LICENCES L'
||' where ' || :P126_MARINE_PARK || ' IS NOT NULL '
*||' M.' || :P126_MARINE_PARK || ' IS LIKE ''' || :P126_MARINE_PARK || '%'' '*
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||' AND :P126_QUERY = ''Y'''
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/* debugging */
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htp.preopen;
htp.p(v_sql);
htp.preclose;
END IF;
RETURN (v_sql);
END;
>
Can you tell me how can I display dynamic multiple column in my query? Say in the LIKE condition if user type M in the parameter field and click on go, it must return more than one column starting column name M but in my current query it will only display one column, am I right?
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Kind regards,
M Tajuddin
http://tajuddin.whitepagesbd.com -
Why named parameter can't be used multiple times in PL/SQL block in JDBC
with the following PL/SQL block, when I run int in JDBC, I get an error,
it says, The number of parameter names does not match the number of registered parameters.
if all named parameters are used only once, then my program works fine.
My old program uses Oracle Forms to run the attached PL/SQL block correctly, I just want to run them in JDBC without more efforts, I don't want to rewrite all PL/SQL blocks.
Does oracle driver support this case? why the PL/SQL block can work in Oracle Forms but failed in JDBC?
Can we have an another solutions to avoid rewriting the PL/SQL block to stored procedure?
if I use following SQL:
BEGIN if :q is null then :q := 'X'; else :q := 'Y'; end if; END;
, Using java program:
import java.sql.*; public class RunPLSQLBlock { public static void main(String s[]) throws SQLException { String URL = "jdbc:oracle:thin:@192.168.11.199:1521:TIBSTEST"; Connection con = null; try { Class.forName("oracle.jdbc.driver.OracleDriver"); con = (Connection) DriverManager.getConnection(URL, "FBP1DEV", "FBP1DEV"); String SQL = "BEGIN if :q is null then :q := 'X'; else :q := 'Y'; end if; END;"; CallableStatement stmt = con.prepareCall(SQL); stmt.registerOutParameter("q", Types.VARCHAR); stmt.setString("q", "A"); stmt.execute(); } catch (Exception e) { e.printStackTrace(); } finally { if (con != null) { con.close(); } } } }
in the coding, only "q" registered, I got:
java.sql.SQLException: The number of parameter names does not match the number of registered praremeters at oracle.jdbc.driver.OracleSql.setNamedParameters(OracleSql.java:314) at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:10096) at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:5693) at RunPLSQLBlock.main(RunPLSQLBlock.java:28)
now, tried to register 3 indexes, changed fragments are below.
import java.sql.*; public class RunPLSQLBlock { public static void main(String s[]) throws SQLException { String URL = "jdbc:oracle:thin:@192.168.11.199:1521:TIBSTEST"; Connection con = null; try { Class.forName("oracle.jdbc.driver.OracleDriver"); con = (Connection) DriverManager.getConnection(URL, "FBP1DEV", "FBP1DEV"); String SQL = "BEGIN if :q is null then :q := 'X'; else :q := 'Y'; end if; END;"; CallableStatement stmt = con.prepareCall(SQL); stmt.registerOutParameter(1, Types.VARCHAR); stmt.registerOutParameter(2, Types.VARCHAR); stmt.registerOutParameter(3, Types.VARCHAR); stmt.setString(1, "A"); stmt.execute(); } catch (Exception e) { e.printStackTrace(); } finally { if (con != null) { con.close(); } } } }
now error changed to:
java.sql.SQLException: ORA-01006: bind variable does not exist at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:457) at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:400) at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:926) at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:476) at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:200) at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:543) at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:208) at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:1416) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1757) at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:4372) at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:4595) at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:10100) at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:5693) at RunPLSQLBlock.main(RunPLSQLBlock.java:26)
, now tried register only 1 position like below,
CallableStatement stmt = con.prepareCall(SQL); stmt.registerOutParameter(1, Types.VARCHAR); stmt.setString(1, "A"); stmt.execute();
, it says:
java.sql.SQLException: Missing IN or OUT parameter at index:: 2 at oracle.jdbc.driver.OraclePreparedStatement.processCompletedBindRow(OraclePreparedStatement.java:2177) at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:4356) at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:4595) at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:10100) at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:5693) at RunPLSQLBlock.main(RunPLSQLBlock.java:26)
, now let try a OK case, which use all named parameters only once. coding like below, SQL and Java listed below.
BEGIN if :q is null then :r := 'X'; else :s := 'Y'; end if; EXCEPTION WHEN NO_DATA_FOUND THEN NULL; END;
import java.sql.*; public class RunPLSQLBlock { public static void main(String s[]) throws SQLException { String URL = "jdbc:oracle:thin:@192.168.11.199:1521:TIBSTEST"; Connection con = null; try { Class.forName("oracle.jdbc.driver.OracleDriver"); con = (Connection) DriverManager.getConnection(URL, "FBP1DEV", "FBP1DEV"); String SQL = "BEGIN if :q is null then :r := 'X'; else :s := 'Y'; end if; END;"; CallableStatement stmt = con.prepareCall(SQL); stmt.registerOutParameter("q", Types.VARCHAR); stmt.registerOutParameter("r", Types.VARCHAR); stmt.registerOutParameter("s", Types.VARCHAR); stmt.setString("q", "A"); stmt.execute(); System.out.println("Q :" + stmt.getString("q")); System.out.println("R :" + stmt.getString("r")); System.out.println("S :" + stmt.getString("s")); } catch (Exception e) { e.printStackTrace(); } finally { if (con != null) { con.close(); } } } }
, the case give us the following output:
Q :A R :null S :Y
2nd part, I also tried another scheme, to use 'execute immediate', test code attached below, it also have errors.
begin execute immediate 'begin if :q is null then :q := ''X''; else :q := ''Y''; :r := ''Z''; end if; end;' using in out :q, out :r; end;
, Java Code:
import java.sql.*; public class RunDynamicSQL { public static void main(String s[]) throws SQLException { String URL = "jdbc:oracle:thin:@192.168.11.199:1521:TIBSTEST"; Connection con = null; try { Class.forName("oracle.jdbc.driver.OracleDriver"); con = (Connection) DriverManager.getConnection(URL, "FBP1DEV", "FBP1DEV"); String SQL ="begin execute immediate 'begin if :q is null then :q := ''X''; else :q := ''Y''; :r := ''Z''; end if; end;' using in out :q, out :r; end;"; CallableStatement stmt = con.prepareCall(SQL); stmt.registerOutParameter("q", Types.VARCHAR); stmt.registerOutParameter("r", Types.VARCHAR); stmt.setString("q", "A"); stmt.execute(); System.out.println("Q :" + stmt.getString("q")); System.out.println("R :" + stmt.getString("r")); } catch (Exception e) { e.printStackTrace(); } finally { if (con != null) { con.close(); } } } }
, the output is, we can find when parameter 'q' is IN OUT mode, we can't get its final value:
Q :null R :Z
, now I tried my workaround, it works fine by using a temporary variable, now my named parameter is split to 2 roles, one is for IN, another is for OUT, now I can get final out value.
declare q clob; r clob; begin q := ?; r := ?; execute immediate 'begin if :q is null then :q := ''X''; else :q := ''Y''; :r := ''Z''; end if; end;' using in out q, out r; ? := q; ? := r; end;
, my test java code,
import java.sql.*; public class RunDynamicSQL { public static void main(String s[]) throws SQLException { String URL = "jdbc:oracle:thin:@192.168.11.199:1521:TIBSTEST"; Connection con = null; try { Class.forName("oracle.jdbc.driver.OracleDriver"); con = (Connection) DriverManager.getConnection(URL, "FBP1DEV", "FBP1DEV"); String SQL ="declare q clob;r clob; begin q := ?; r := ?; execute immediate 'begin if :q is null then :q := ''X''; else :q := ''Y''; :r := ''Z''; end if; end;' using in out q, out r; ? := q; ? := r; end;"; CallableStatement stmt = con.prepareCall(SQL); stmt.registerOutParameter(3, Types.VARCHAR); stmt.registerOutParameter(4, Types.VARCHAR); stmt.setString(1, "A"); stmt.setString(2, "A"); stmt.execute(); System.out.println("Q :" + stmt.getString(3)); System.out.println("R :" + stmt.getString(4)); } catch (Exception e) { e.printStackTrace(); } finally { if (con != null) { con.close(); } } } }
, the output is expected,
Q :Y R :Z
Database:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
JDBC Driver, extracted from ojdbc6_g.jar/META-INF/MANIFEST.MF :
Created-By: 1.5.0_30-b03 (Sun Microsystems Inc.)
Implementation-Vendor: Oracle Corporation
Implementation-Title: JDBC debug
Implementation-Version: 11.2.0.3.0
Repository-Id: JAVAVM_11.2.0.3.0_LINUX_110823
Specification-Vendor: Sun Microsystems Inc.
Specification-Title: JDBC
Specification-Version: 4.0
Main-Class: oracle.jdbc.OracleDriver
JDK:
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) Client VM (build 21.0-b17, mixed mode, sharing)
Edited by: jamxval on 2013-3-22 2:01PM (UTC+08:00), Give full test java program and SQL, added environment/API level; Attached another problem.
Edited by: jamxval on 2013-3-26 17:57 (UTC +08), Adjust code styleHi, thanks for your response, now I see, the named parameter is for stored procedure only, for PL/SQL block we name it placeholder name.
After cast my java.sql.CallableStatement to oracle.jdbc.OracleCallableStatement, I can find setStringAtName,
now, I have only one question:I can't find corresponding methods for registerOutputParameter, how we fetch output value?
I tried to callableStatement.getString("q"); it reports errors, but there are no ordinal binding in my source code, does placeholder names doesn't support OUT mode?
Java:
CallableStatement stmt = con.prepareCall("BEGIN if :q is null then :r := 'X'; else :s := 'Y'; end if; END;");
oracle.jdbc.OracleCallableStatement call = (oracle.jdbc.OracleCallableStatement) stmt;
call.registerOutParameter("q", Types.VARCHAR);
call.registerOutParameter("r", Types.VARCHAR);
call.registerOutParameter("s", Types.VARCHAR);
call.setStringAtName("q", "A");
call.setStringAtName("r", "A");
call.setStringAtName("s", "A");
call.execute();
System.out.println("Q :" + call.getString("q"));
</Java>
<output>
java.sql.SQLException: 不允许的操作: Ordinal binding and Named binding cannot be combined!
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.OracleCallableStatement.getString(OracleCallableStatement.java:2834)
at RunPLSQLBlock.main(RunPLSQLBlock.java:33)
</output>by the way, in my below-mentioned SQL 'problematic', when my code uses 'execute immediate' and use placeholder names in IN OUT mode, we always get NULL value (i.e. ':q'), but we can get final value of ':r' when ':r' is OUT mode only; now I get a workaround attached in below-mentioned 'my workaround' block, which split the IN OUT roles to 2 parts, it can work now;
It seems that the difference between 'problematic' and 'my workaround' imply that there are something work unexpectedly when the driver process the placeholder names, because 'my workaround' and ':r in problematic case' make sure the 'execute immediate' returned output values correctly, unluckly driver layer can't get return values.
<SQL name = 'problematic'>
begin
execute immediate 'begin if :q is null then :q := ''X''; else :q := ''Y''; :r := ''Z''; end if; end;'
using in out :q, out :r;
end;
</SQL>
<SQL name='my workaround'>
declare
q clob;
r clob;
begin
q := ?;
r := ?;
execute immediate 'begin if :q is null then :q := ''X''; else :q := ''Y''; :r := ''Z''; end if; end;' using in out q, out r;
? := q;
? := r;
end;Edited by: EJP on 26/03/2013 14:14 -
FETCHING OUTPUT VALUE FROM PL/SQL BLOCK
hI aLL,
I'm working on ODP.NET. I'm executing below pl/sql command. while executing this command in pl/sql it's showing the output which is an xml.
declare
xmloutput xmltype;
xmldata varchar(32767);
teid t_id := t_en_id( 'L','L',NULL,12121,'ABC','USER','N');
tgetinfo to_info := NULL;
RETVAL NUMBER;
begin
RETVAL := GET_DTLS(teid,tgetinfo);
dbms_output.put_line(RETVAL);
xmldata := tgetinfo.XML_info.getclobval();
dbms_output.put_line(xmldata);
end;
I passed above command in string variable for passing in code. like below
string StrQry = "";
StrQry += "declare \n";
StrQry += "xmloutput xmltype; \n";
StrQry += "xmldata varchar(32767); \n";
StrQry += "teid t_id := t_en_id( 'L','L',NULL,12121,'ABC','USER','N'); \n";
StrQry += "tgetinfo to_info := NULL; \n";
StrQry += "RETVAL NUMBER; \n";
StrQry += "begin \n";
StrQry += "RETVAL := GET_DTLS(teid,tgetinfo); \n";
StrQry += "dbms_output.put_line(RETVAL); \n";
StrQry += "xmldata := tgetinfo.XML_info.getclobval(); \n";
StrQry += "dbms_output.put_line(xmldata); \n";
StrQry += "end; \n";
I'm passing output parameter ":temp" for this command. I want to catch output xml in ":temp" variable
which is varchar2 type.
Added below line before printing xmldata;
StrQry += ":temp := xmldata; \n";
cn.Open();
OracleCommand cmd = new OracleCommand(StrQry, cn);
cmd.Parameters.Add(":temp", OracleDbType.Varchar2, 32767, ParameterDirection.Output);
cmd.ExecuteNonQuery();
But which executing through c# code it's showing the below error.
Oracle.DataAccess.Client.OracleException ORA-06502: PL/SQL: numeric or value err
or: character string buffer too small
ORA-06512: at line 11 at Oracle.DataAccess.Client.OracleException.HandleError
Helper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOp
oSqlValCtx, Object src, String procedure)
at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, Oracle
Connection conn, String procedure, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx
, Object src)
at Oracle.DataAccess.Client.OracleCommand.ExecuteNonQuery()
at orclGetDetails.Program.DoProcess()
How can i get the output to output variable ":temp".
Pls help.
Ideas are appreciated.Your PL/SQL block isn't returning anything. DBMS_OUTPUT is, at best, a way of debugging code, not passing data around. Assuming you configure and enable an appropriately sized buffer, I suppose your ODP.Net application could make DBMS_OUTPUT.GET_LINE calls to retrieve the XML. But that's not not a way to design an application.
If you want a PL/SQL block that returns XML, you'll need to create a function and have the function return the XML (you could also create a procedure with an OUT parameter in which you could return the XML).
Justin -
Pass values to Guid collection/array parameter for anonymous pl/sql block
The following code pops the System.ArgumentException: Invalid parameter binding
Parameter name: p_userguids
at Oracle.DataAccess.Client.OracleParameter.GetBindingSize_Raw(Int32 idx)
at Oracle.DataAccess.Client.OracleParameter.PreBind_Raw()
at Oracle.DataAccess.Client.OracleParameter.PreBind(OracleConnection conn, IntPtr errCtx, Int32 arraySize)
at Oracle.DataAccess.Client.OracleCommand.ExecuteNonQuery()
Any help or advice ?
anonymous pl/sql block text:
DECLARE
TYPE t_guidtable IS TABLE OF RAW(16);
p_userguids t_guidtable;
BEGIN
DELETE testTable where groupname=:groupname;
INSERT INTO testTable (userguid, groupname)
SELECT column_value, :groupname FROM TABLE(p_userguids);
END;
c# code:
public static void SetGroupUsers(string group, List<Guid> users)
OracleConnection conn = Database.ConnectionEssentus;
try
conn.Open();
OracleCommand sqlCmd = new OracleCommand();
sqlCmd.CommandText = sqls["SetGroupUsers"]; // above anonymous block
sqlCmd.Connection = conn;
sqlCmd.BindByName = true;
OracleParameter p_guidCollection = sqlCmd.Parameters.Add("p_userguids", OracleDbType.Raw);
p_guidCollection.Size = users.Count;
p_guidCollection.CollectionType = OracleCollectionType.PLSQLAssociativeArray;
p_guidCollection.UdtTypeName = "t_guidtable";
p_guidCollection.Value = users.ToArray();
sqlCmd.Parameters.Add("groupname", OracleDbType.Varchar2, 30).Value = group;
sqlCmd.ExecuteNonQuery();
catch(Exception ex)
System.Diagnostics.Debug.WriteLine(ex.ToString());
finally
conn.Close();
}New question,
How can I select records using "in" condition clause likes the following sentence?
SELECT userguid, firstname, lastname FROM UserTable WHERE userguid in (SELECT column_value FROM TABLE(p_userguids))
I tried using PIPE ROW like this, but ORACLE said "PLS-00629: PIPE statement cannot be used in non-pipelined functions"
FOR i in p_userguids.first .. p_userguids.last
LOOP
SELECT userguid, firstname, lastname INTO l_userrecord FROM UserTable WHERE userguid=p_userguids(i);
PIPE ROW(l_userrecord);
END LOOP; -
How to re-execute anonymous PL/SQL block in package definition ?
Hi all,
I implemented a package which contains procedures and an anonymous PL/SQL block.
This anonymous PL/SQL block is executed only once when the package is called.
and charge in-memory the content of table to avoid multiple SQL access each
time one procedure is called.
As my application open many sessions to the Oracle database, I would like to try
a solution to signal all sessions to reload the content of table when the content
of table is modified. The solution to stop and to restart the connection is not
acceptable.
Best regards
Sylvain> .. to avoid multiple SQL access each time one procedure is called.
As I understand your posting, this is the actual technical requirement. You want to force serialisation of PL/SQL code. Correct? (only one session at a time can run the procedure)
This feature typically used to accomplish this in o/s code is called a semaphore. PL/SQL does not specifically support semaphores. However, it supports a range of IPC (Inter Process Communication) methods - from message queues to pipes.
One of these IPC interfaces is DBMS_LOCK - which allows a unique lock to be defined and processes to manage their resource usage/execution/etc via this lock using the DBMS_LOCK API.
I've found this a pretty clean and manageable solution to enforce serialisation. Of course, it is even better not to enforce serialisation. Rather design the code to be thread safe and capable of multi-processing/parallel processing.
Personally, I would not use a table as an IPC mechanism as Oracle already provides better IPC mechanisms for PL/SQL code. As for "signalling sessions to re-load the table" - not possible as Oracle sessions cannot register callbacks to handle events. Oracle sessions are not event driven processes from a PL/SQL (application development) perspective. -
Select query inside PL/SQL block.
Hello Experts,
I am just a beginner with PL/SQL.
If I write a select query from client like SQL dev and fire it against a database, it gives me result.
Eg: select * from employee;
Now when I use the same Query inside a PL/SQL block suppose:
Declare
begin
select * from employee;
end;
This gives error on execution, mentioning that an INTO is expected etc...
I have doubts here:
1. Can't I use a plain select inside a PL/SQL block (if so why?)
I know this is kind of very basic question, I tried searching this on the forum but could not find the thread, please redirect me to the link if this is already answered.user8578271 wrote:
Hello Experts,
I am just a beginner with PL/SQL.
If I write a select query from client like SQL dev and fire it against a database, it gives me result.
Eg: select * from employee;
Now when I use the same Query inside a PL/SQL block suppose:
Declare
begin
select * from employee;
end;
This gives error on execution, mentioning that an INTO is expected etc...
I have doubts here:
1. Can't I use a plain select inside a PL/SQL block (if so why?) Because when you run a query in a tool like SQL Developer, or SQL*Plus or TOAD etc. then it opens up a cursor and fetches the data into internal memory structures before displaying it, and that is all done automatically and hidden from you. In PL/SQL, there is no interface to display the results of SQL queries, so you have to specifically tell it what to put the data into.
The syntax is (in basic terms)...
SELECT column1, column2... columnX
INTO variables or record structure
FROM ...Though that can only select a single row of data. If your query returns more than 1 row it will give a TOO_MANY_ROWS exception. If your query returns no rows you will get a NO_DATA_FOUND exception.
If you need to select multiple rows into variables etc., then you would need to "BULK COLLECT" into a collection/array structure, though this takes up valuable memory on the server and shouldn't be used unless necessary (and you understand the implications of doing it). -
Q: how can i write PL/SQL block to check prerequisite?
Hello...
I designed an application using sql*plus statment for creating database and developer for creating forms, for on-line registration system for universties,
so I need to teach me how can I write pl/sql block to check the prerequisite, taken courses, and complete hours for the students who wants register the courses via Internet.
thanks alot in advance
kindly send the answers a.s.a.pplease repost this in the SQL & PL/SQL forum
thanks - OTN
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