Problem in SQL Query Execution
Hi,
I have tried to Insert Data in Table (Using MySQL) , and as far as i know there is no error in my program and it's executing well with out showing any error and throwing exception. Database connected successfully. I have given the full code here. Help me to execute this program as soon as possible .Thanks in advance.
Code:_
public class MysqlConnect{
public static void main(String[] args) {
System.out.println("MySQL Connect Example.");
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/";
String dbName = "demo";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "root";
try {
Class.forName(driver);
conn= DriverManager.getConnection(url+dbName,userName,password);
try{
Statement st = conn.createStatement();
System.out.println("Connection Established");
int value = st.executeUpdate("INSERT INTO demo.login VALUES("+17+","+"'G'"+","+"'GG'"+","+70+")");
System.out.println("1 Row Inserted"+ value);
conn.close();
System.out.println("Disconnected from database");
catch(SQLException Se)
System.out.println("Exception::SQL Statement Not Executed");
} catch (Exception e) {
e.printStackTrace();
Regards,
Prabu
Edited by: [email protected] on Apr 17, 2008 11:10 AM
Edited by: [email protected] on Apr 17, 2008 11:13 AM
I think there is some problem in sql statement u have written code as shown bollow
st.executeUpdate("INSERT INTO demo.login VALUES("17",""'G'"",""'GG'"","70")");
i think the proper statement is as shown bellow
st.executeUpdate("INSERT INTO demo.login VALUES('17','G','GG','70')");
(if all u have 4 columns in u r table of type varchar)
and if this is not solution for ur problem let me know the table structure , i mean columns and datatype of columns.
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Dear All,
I am having some problem in SQL query. I am trying to get total sum of one inventory using the following query it works fine:
sum(case when mt.transaction_quantity > 0 then (mt.transaction_quantity) else 0 end) "TOT_IN"
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But when I breakup the total sum into monthly breakup it fails to return the correct some could any one help what is wrong in the following query which is returning incorrect monthly sum. Following is that query. Your help in this regard would highly be appreciated.
sum(case when mt.transaction_quantity > 0 then (decode (floor (floor (to_date('17-MAR-2009')- mt.transaction_date) / 30), 0, mt.transaction_quantity, null)) else 0 end) "MONTH1_IN"
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ThanksHi,
Sorry, I don't really understand what you want.
Whenever you have a question, it helps to post:
(1) The version of Oracle (and any other relevant software) you're using
(2) A little sample data (just enough to show what the problem is) from all the relevant tables
(3) The results you want from that data
(4) Your best attempt so far (formatted)
(5) The full error message (if any), including line number
Executable SQL statements (like "CREATE TABLE AS ..." or "INSERT ..." statements) are best for (2).
If you can present your problem using commonly available tables (for example, tables in scott schema, or views in the data dictionary), then you can omit (2).
Formatted tabular output is okay for (3). Type these 6 characters
{code}
(small letters only, inside curly brackets) before and after the tabular text, to preserve spacing.
What exactly do you mean by "monthly breakup"?
If you want separate figures for each calendar month, Blushadow's suggestion (TRUNC (mt.transaction_date, 'MM')) is what you want.
If you want separate figures for the last 30 days before today, then something like what you posted ("FLOOR ((:target_date - mt.transaction_date) / 30)": the extra FLOOR doesn't help any) should work, so if you ran the query on March 17, 2009, the first "month" would be February 16 through March 17.
In a CASE statement, there's rarely any need to use DECODE. The following is equivalent to the last line of code you posted:
, SUM ( CASE
WHEN mt.transaction_quantity >= 0
THEN 0
WHEN TO_DATE ('17-MAR-2009', 'DD-MON-YYYY') - mt.transaction_date
BETWEEN 0
AND 29.99999 -- 30 days minus a fraction of a second
THEN ABS (mt.transaction_quantity)
END
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MySql version
-------------------------------------------------------+
| Variable_name | Value |
-------------------------------------------------------+
| innodb_version | 1.1.4 |
| protocol_version | 10 |
| slave_type_conversions | |
| version | 5.5.8 |
| version_comment | MySQL Community Server (GPL) |
| version_compile_machine | x86 |
| version_compile_os | Win64 |
-------------------------------------------------------+
SQL Develper Info:
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Edited by: user501466 on 19-Mar-2011 03:21Hi Dermot,
Some clarification.
I have tried these 3 drivers below with the following results:
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5.0.8 First Query succeeds, Second Query fails with Query execution was interrupted. Subsequent queries give the same result.
5.1.15 Same as 5.0.8
I tried your suggestion, removed the driver, restarted, installed the 5.0.4 driver and restated and ran the test,
(I added a drop table so I could run it repeatedly) and it works repeatedly if I choose "Run as script F5".
DROP TABLE table1;
CREATE TABLE table1(col1 int);
INSERT INTO Table1 values(1);
SELECT * FROM table1;
SELECT * FROM table1;
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I looked in the logfile for SQLDeveloper but it was empty.
I also tried creating a new database as root and connecting as root (same result)
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I have two other tools for accessing MySql: Toad and MySql workbench, both of which work but I've used SQL Developer with Oracle for some years and would like to keep using it.
I just tried connecting to a remote MySQL database and that seems to work without problems.
I'm thinking it may be related to some incompatibility between SQLDeveloper and the MySQL installed locally.
I'll try another version....
Ok I installed a 32 bit version of MySql 5.5.10. I thought things were working but now I still get the problem but it is much more intermittent.
Now I can get it by modifying the query ie.
select * from table1; (works repeatedly untill followed by a change to the query)
select * from table1 order by col1; (fails)
Another case
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select * from table1 order by col1 asc; (fails first time)
very weird...
Edited by: user501466 on 26-Mar-2011 06:19 -
Hi,
I have a problem in using transactions with SQL Querys.
I developed a TA based an SQL Querys against a MS SQL Server by using the jtds driver.
After execution of the sql query I iterate through the result data by using the repeater action on the xMII XML results of the query. Using the jtds driver all table and field names are in lower case letters.
Now I changed the data server to test it with oracle to an oracle database by using the oracle jdbc driver. The database and tables on both Oracle and MS are created with the same sql script.
The oracle driver returns table and field names in only capital letters. So the created transaction can not be used. Because it for example accesses the node "type" in the XML structure which is fine for jtds. But when oracle is used, the node has the name "TYPE", so the TA tries to use node type but there is only node TYPE that causes the TA to run into an error.
Anyone has an idea how to avoid / solve this problem?
Regards
TimoThat's exactly what I used as solution now.
Instead of doing
"select fieldname from tablename"
I do now
"select fieldname as "fieldname" from tablename"
So both in Oracle and Microsoft SQL Server the returned field names of the query are in lower case letters.
Thank you for your help.
Regards Timo -
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My query includes an ORDER BY clause within a windowing function and HTMLDB refuses to accept the source owing to the presence of the ORDER BY and the column heading sort preference.
Clearly the order-by in a window function has little to do with the column heading sort, but this error prevents me from updating the conditional display item in the page definition.
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Problem in sql query because of order by clause
Hi All,
I am facing a one problem in my one sql query.I am using Oracle 10gR2.
Query is given below:
SELECT t1.ename
FROM T1, T2
WHERE T1.EMPNO = 1234
AND T1.ACCOUNTNO = T2.ACCOUNTNO
AND T1.SEQ = T2.SEQ
ORDER BY T2.SEQThe Plan of the query is :
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 2 | 218 | 11716 (1)| 00:00:41 |
|* 1 | TABLE ACCESS BY INDEX ROWID | T1 | 1 | 89 | 1 (0)| 00:00:01 |
| 2 | NESTED LOOPS | | 2 | 218 | 11716 (1)| 00:00:41 |
|* 3 | TABLE ACCESS BY INDEX ROWID| T2 | 2 | 40 | 11715 (1)| 00:00:41 |
| 4 | INDEX FULL SCAN | PK_T2_SEQ | 58752 | | 122 (5)| 00:00:01 |
|* 5 | INDEX RANGE SCAN | FK_ACCOUNTNO | 3 | | 0 (0)| 00:00:01 |
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If i am removing Order by clause from query than performance of the query is totally perfect but with order by clause its taking a time.
I have already set SORT_AREA_SIZE but still nothing is improving.
Welcome and thanks for your suggestions.
Thanks,
Edited by: BluShadow on 23-Jun-2011 07:55
added {noformat}{noformat} tags and formatted explain plan to make it readable. Please see {message:id=9360002} for details on how to post code and dataHi,
There are a couple of things I do not understand.
1. Why don't you put {noformat}{noformat} around your code, it makes it so much easier to read, especially your explain plan
2. You claim that the ORDER BY is problematic compared to no order by. Then why do you choose to post only one plan?
3. It is hard to understand how your tables relate, and which indexes you have and which you don't.
- PK_T2_SEQ, does this mean that SEQ alone is primary key of T2?
- If SEQ is primary key of T2, why do you join on accountno, seq and not just seq?
- If SEQ is primary key of T2 one of the tables is denormalized.
4. FK_ACCOUNTNO, is this an index on accountno, alone?
- Or is this AccountNo, Seq?
5. Is there no index on T1.EMPNO?
Above could of course just be a case of my not understanding the names of your indexes.
So, here are my guesses:
Above plan is for the ORDER BY query. That means the optimizer, has chosen to full scan PK_T2_SEQ, since data is then read according to the ORDER BY.
(This could be a bad choice)I
You could try and order by t1.seq, instead. Result should be the same.
Regards
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USER_LOGIN
CREATE TABLE USER_LOGIN
EMAIL_ADDRESS VARCHAR2(30 BYTE) NOT NULL,
PASSWORD VARCHAR2(30 BYTE) NOT NULL,
LAST_NAME VARCHAR2(20 BYTE),
FIRST_NAME VARCHAR2(20 BYTE),
STATUS VARCHAR2(1 BYTE)
DATA:
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, klein, james, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, cullen, sarah, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, cole, kling, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, stein, amy, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, stone, edward, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, simps, harris, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, brown, steven, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, kumar, vikram, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, gray, susan, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, green, monica, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, tile, eric, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, parder, sergey, 1);
INSERT INTO USER_LOGIN (EMAIL_ADDRESS, PASSWORD, LAST_NAME, FIRST_NAME, STATUS) VALUES ( [email protected], UjBhZHJ1bm5lcg==, fossil, bill, 1);
This is just the sample data. In production I have around 30,000 records and I have a requirement to retrieve the records in a batch of 5,000 at a time.
For testing on the above 10 records, I need to retrieve 3 at a time.
For instance: From my java servlet phase listener, I am going to run a loop, inside which I make a database call. For the first time inside the loop, it has to fetech records 1 to 3, the second time 4 to 6, the third time 7 to 9 and finally the last record. I will be able to pass two parameters for start and end row indexes.
I have come up with the following query...
SELECT U.EMAIL_ADDRESS,
U.PASSWORD,
U.LAST_NAME,
U.FIRST_NAME,
U.STATUS
FROM USER_LOGIN U
WHERE ROWNUM > /*start index*/ AND ROWNUM < /*end index*/
ORDER BY EMAIL_ADDRESS
But the results are not as expected. It works well for the first batch where start index is 0 and end index is 4, but it returns zero records when start index is 3 and end index is 7. Any help on this would be highly appreciated
Thanks.Saludos Sirgeneral,
This is one of the technique you should be working on
SELECT * FROM(
SELECT ROWNUM rn,e.* FROM emp e
ORDER BY empno)
WHERE rn BETWEEN &st_range AND &end_rangeIn your case the query would be
select * from(
SELECT rownum en, U.EMAIL_ADDRESS,
U.PASSWORD,
U.LAST_NAME,
U.FIRST_NAME,
U.STATUS
FROM USER_LOGIN U
ORDER BY EMAIL_ADDRESS)
where rn between 4 and 6); --second set for exampleCheers!!!
Bhushan -
VERY URGENT: problem in sql query with long datatype in weblogic
I have a problem while tryind to retrieve a column value with a long datatype using servlet and oci driver and the server is weblogic5.1 .I have used prepared statement the problem comes in the
preparedStatement.executeQuery().
The sql Query is simple query and runs well in all cases and fails only when the long datatype column is included in the query.
The exception that comes on the weblogic server is that :
AN UNEXPECTED EXCEPTION DETECTED IN THE NATIVE CODE OUTSIDE THE VM.Did you try changing the driver then?
Please use Oracle's thin driver instead of the oci driver.
There are many advantages of using the type 4 driver. the first and foremost being that it does not require oracle client side software on your machine. Therefore no enteries to be made in tnsnames.ora
The thin driver is available in a jar called classes112.zip the class which implements the thin driver is oracle.jdbc.driver.OracleDriver
the connection string is
jdbc:oracle:thin:@<machine name>:1521:<sid>
please try out with the thin driver and let me know.
regards,
Abhishek. -
Database Link Problem-Peculiar SQL stmt execution.. Please help
Hi all,
This is a strange problem i'm facing while running the following query.
This query is run on the local machine which is fetching data from another remote database. All the functions included also are fetching data from the remote database through db links.
I know lot of db links are into picture, but the requirement is like this only.
SQL :SELECT billing_extract_subscriber.get_external_id_types_descr
(ciem.external_id_type,
'ra_delhi'
) AS "EXTERNAL_ID_TYPE",
ciem.external_id, ciem.subscr_no customer_equip_map_subscr_no,
ciem.subscr_no_resets, s.subscr_no servive_subscriber_no,
s.service_active_dt, s.service_inactive_dt, s.is_prepaid,
billing_extract_subscriber.get_status_values_descr
(ss.status_id,
'ra_delhi'
) AS "STATUS_VALUES",
billing_extract_subscriber.get_status_type_values_descr
(ss.status_type_id,
'ra_delhi'
) AS "STATUS_TYPE_VALUES",
ss.subscr_no service_status_subscr_no, NULL "point_target",
NULL "customer_corridors_subscr_no", cmc.component_id, cmc.package_id,
billing_extract_subscriber.get_component_name_descr
(cmc.component_id,
'ra_delhi'
) AS "COMPONENT_NAME",
billing_extract_subscriber.get_package_def_values_descr
(cmc.package_id,
'ra_delhi'
) AS "PACKAGE_NAME",
cmc.component_status,
billing_extract_subscriber.get_mkt_code_values_descr
(cf.mkt_code,
'ra_delhi'
) AS "MKT_CODE",
cf.account_no,
billing_extract_subscriber.get_bill_period_descr
(cf.bill_period,
'ra_delhi'
) AS "BILL_PERIOD",
cf.account_type,
billing_extract_subscriber.get_account_category_descr
(cf.account_category,
'ra_delhi'
) AS "ACCOUNT_CATEGORY",
billing_extract_subscriber.get_gender_descr (cf.gender,
'ra_delhi'
) AS "GENDER"
FROM customer_id_equip_map@ra_delhi ciem,
service@ra_delhi s,
service_status@ra_delhi ss,
cmf_package_component@ra_delhi cmc,
cmf@ra_delhi cf
WHERE ciem.subscr_no = s.subscr_no
AND s.subscr_no = ss.subscr_no
AND s.parent_account_no = cf.account_no
AND s.service_active_dt >= cf.date_active
AND NVL (s.service_inactive_dt, '31-dec-9999') <=NVL (cf.date_inactive, '31-dec-9999')
AND s.service_active_dt <= ciem.active_date
AND NVL (s.service_inactive_dt, '31-dec-9999') >=NVL (ciem.inactive_date, '31-dec-9999')
AND cmc.parent_account_no = cf.account_no
AND ciem.active_date <= cmc.active_dt
AND NVL (ciem.inactive_date, '31-dec-9999') >=NVL (cmc.inactive_dt, '31-dec-9999');
*1. Now when i'm running this sql all as a whole I'm getting the error:*
ORA-00904: "S"."SERVICE_INACTIVE_DT": invalid identifier
ORA-02063: preceding line from RA_DELHI
Sometimes Invalid Identifier, sometimes invalid table etc. is coming.
*2. Now when i'm running the above query after breaking into two parts is :*
a. first part .. WHERE clause is removed -
SELECT billing_extract_subscriber.get_external_id_types_descr
(ciem.external_id_type,
'ra_delhi'
) AS "EXTERNAL_ID_TYPE",
ciem.external_id, ciem.subscr_no customer_equip_map_subscr_no,
ciem.subscr_no_resets, s.subscr_no servive_subscriber_no,
s.service_active_dt, s.service_inactive_dt, s.is_prepaid,
billing_extract_subscriber.get_status_values_descr
(ss.status_id,
'ra_delhi'
) AS "STATUS_VALUES",
billing_extract_subscriber.get_status_type_values_descr
(ss.status_type_id,
'ra_delhi'
) AS "STATUS_TYPE_VALUES",
ss.subscr_no service_status_subscr_no, NULL "point_target",
NULL "customer_corridors_subscr_no", cmc.component_id, cmc.package_id,
billing_extract_subscriber.get_component_name_descr
(cmc.component_id,
'ra_delhi'
) AS "COMPONENT_NAME",
billing_extract_subscriber.get_package_def_values_descr
(cmc.package_id,
'ra_delhi'
) AS "PACKAGE_NAME",
cmc.component_status,
billing_extract_subscriber.get_mkt_code_values_descr
(cf.mkt_code,
'ra_delhi'
) AS "MKT_CODE",
cf.account_no,
billing_extract_subscriber.get_bill_period_descr
(cf.bill_period,
'ra_delhi'
) AS "BILL_PERIOD",
cf.account_type,
billing_extract_subscriber.get_account_category_descr
(cf.account_category,
'ra_delhi'
) AS "ACCOUNT_CATEGORY",
billing_extract_subscriber.get_gender_descr (cf.gender,
'ra_delhi'
) AS "GENDER"
FROM customer_id_equip_map@ra_delhi ciem,
service@ra_delhi s,
service_status@ra_delhi ss,
cmf_package_component@ra_delhi cmc,
cmf@ra_delhi cf
The query is running fine.
b. when i'm running the another part where i'm removing the functions and replacing with then also it is running fine. e.g*
SELECT *
FROM customer_id_equip_map@ra_delhi ciem,
service@ra_delhi s,
service_status@ra_delhi ss,
cmf_package_component@ra_delhi cmc,
cmf@ra_delhi cf
WHERE ciem.subscr_no = s.subscr_no
AND s.subscr_no = ss.subscr_no
AND s.parent_account_no = cf.account_no
AND s.service_active_dt >= cf.date_active
AND NVL (s.service_inactive_dt, '31-dec-9999') <=NVL (cf.date_inactive, '31-dec-9999')
AND s.service_active_dt <= ciem.active_date
AND NVL (s.service_inactive_dt, '31-dec-9999') >=NVL (ciem.inactive_date, '31-dec-9999')
AND cmc.parent_account_no = cf.account_no
AND ciem.active_date <= cmc.active_dt
AND NVL (ciem.inactive_date, '31-dec-9999') >=NVL (cmc.inactive_dt, '31-dec-9999');
*3. I can trace out there is some problem related to the concurrent db links getting opened.*
i've done resizing the following parameters as well but isn't working :
NAME TYPE VALUE
open_cursors integer 3000
open_links integer 100
open_links_per_instance integer 100
read_only_open_delayed boolean FALSE
session_max_open_files integer 10
NAME TYPE VALUE
open_cursors integer 3000
open_links integer 100
open_links_per_instance integer 100
read_only_open_delayed boolean FALSE
session_max_open_files integer 10
SQL>
SQL> sho parameter distributed
NAME TYPE VALUE
distributed_lock_timeout integer 300
I've tried breaking up the query but in any case i'm opening same no. of dblinks. So it din't help me.
Kindly Suggset what to do? Is there any more parameter which govern maximum db links opened at a time? or is this problem due to someother reasons?
Database Details :
Version : 10.2.0.3.0
Platform : HP UXHi all,
NO RESPONSE AT ALL???
Well not a PROBLEM....
I got my solution so thought of writing it here for everybody's reference.
SQL> alter session set events '10176 trace name context forever';
Session altered.
SQL> alter system flush shared_pool;
System altered.
And then I have execute original query given by Prabhat, it's running fine.
Applies to:
Oracle Server - Enterprise Edition - Version: 10.2.0.1 to 11.1.0.7
This problem can occur on any platform.
Symptoms
-- Problem Statement:
Following query over dblink having Local database 9iR2 and remote 10gR2 works..
select *
from ctps3.institutions@ctps3 i,
ctps3.state_types@ctps3 s,ods.institutions oi
where s.stt_state_type_id (+) = i.stt_state_type_id
and oi.ctps_insttn_id = i.inst_insttn_id
and i.inst_modifd_dt = trunc(sysdate)
and (nvl (oi.inst_state_txt, 'x') <> nvl (s.stt_state_type_nm, 'x'))
and (nvl (oi.inst_phone_txt, 17) <> nvl (i.inst_phone_txt, 17));
The same query fails when both local and remote databases are 10g R2, with following errors:
ERROR at line 2:
ORA-00904: "OI"."INST_STATE_TXT": invalid identifier
ORA-02063: preceding line from CTPS3
Cause
Outer join query over dblink can fail with ORA-904, as referenced in:
Bug 6620988 QUERY OVER DBLINK FAILS WITH ORA-904 SELECTING DATE
Predicates are not checked to verify if they belong to same network node when we attempt to colocate the remote tables. This results in wrongly generating remote query and ORA-904
REDISCOVERY INFORMATION:
1. ORA-904
2. DB link
3. OJ predicates across network nodes
4. predicates wrongly pushed network nodes
Solution
-- To implement the solution, please execute the following steps::
Use the workaround of disabling colocated joins via event 10176 and force a hard parse to happen
(ie by flushing the shared pool), ie:
SQL> alter session set events '10176 trace name context forever';
SQL> alter system flush shared_pool;
or
For a permanent fix, request a One-Off Backport of 6620988 for the appropiate platform.
References
Bug 6620988 - QUERY OVER DBLINK FAILS WITH ORA-904 SELECTING DATE -
Problems witth sql query from servlet
hi,
I have a servlet that accesses a MySql database to get the ID of an employee based on employee name (grabbed from session). My problem is that :
empName contains a whitespace (String empName ="abc xyz")
When I try to give this to the query:
String query ="select id from user where eName =" +empName;
Now I keep getting a "SQL syntax error:please check your syntax to use near 'xyz' at line 1." here which I think is because of the white space in the empName. ( I tried dummy empName without spaces).
How do I get around this ..I cannot keep the names in the database without any space since they are being dislpayed in other pages. I tried doing a trim() on the empName before passing it to the sql query but I keep getting the same error.
Is there any way I could query the DB with a white space in the empName?
Thanks,
G.
Is there any way toSecond of all: Use prepared statements:
like:
insertStatement = "SELECT ? FROM ? WHERE name=?";
stmnt = _sql_connection.prepareStatement(insertStatement);
stmnt.setString(1, "name");
stmnt.setString(2, "table");
stmnt.setString(3, "test");This is more secure. If you do it the above way i could enter some thing like
*; DROP TABLE *; --
You dont want a user to kill your whole db, dont you?
so your querry String query ="select id from user where eName = '" +empName +"'"; will end up:
select id from user where eName = '*'; DROP TABLE *; -- 'where everything after -- is ignored because this is a comment flag. -
Problem use SQL query in coding report with SBO
Hi everyone!
I have problem in execute query to delete and create a report with SQL 2000 in SAP.
Try
oForm.DataSources.DataTables.Item(0).ExecuteQuery("DELETE FROM rptReport")
Catch ex As Exception
End Try
oForm.DataSources.DataTables.Add("TestReport")
oForm.DataSources.DataTables.Item(0).ExecuteQuery("SELECT Number, RefDate, Memo into rptReport FROM dbo.OJDT")
oTable = oForm.DataSources.DataTables.Item("TestReport")
This code is error. I don't know how to execute 2 this sql command. Hope everyone help me hix hix! ./Invalid query tree [300-33]. The SQL error is 8180/
But search in SQL book hasn't got that err. Some person spoke ExecuteQuery property wasn't support Table Delete and Create, it only support simple Select... I tried to use Recordset but don't success. Can I use "Delete" and "Select ... Into..." query another style??? Help me, please...!!! -
Strange problem with SQL query in toad.
Guys,
My colleague is up with a strange problem with an SQL query that if it is run in toad encounters the "ORA-03113: end-of-file on communication channel" problem,but if run in SQL plus executes just fine.
Do anyone have thoughts about this strange error in toad?
Thanks!!!!
Regards,
BhagatNot sure what version of TOAD you have but it may have shipped with SQLMonitor which montiors SQL sent from Windows apps . Navigation should be similar to;
Start~Programs~Quest Software~TOAD for Oracle~Tools~SQLMonitor
or
C:\Program Files\Quest Software\Toad for Oracle\SQLMonitor.exe
To use it, start TOAD and connect, start SQLMonitor and click the checkbox for TOAD.exe, then execute the query. SQLMonitor will show you the actual query that TOAD sent to the client. It may be exactly what you sent or it may contain some extras. -
Re: Problem in SQL Query
Hi Billy,
Thanks for ur reply. It was very helpful. I do have a small problem i want to reterieve a column called doc_class_description from a table called class which also contains the doc_class_code. To be more clear
tablename: Class
the fields are:
Name Null? Type
DOC_CLASS_CODE NOT NULL NUMBER(10)
DOC_CLASS_DESCRIPTION VARCHAR2(1000)
I want to reterieve this column DOC_CLASS_DESCRIPTION along with the columns in subclass table in the same format as asked yesterday.
for ur reference:
fields in subclass table are:
Name Null? Type
DOC_CLASS_CODE NUMBER(10)
DOC_SUBCLASS_CODE NOT NULL NUMBER(10)
DOC_SUBCLASS_DESCRIPTION VARCHAR2(1000)
My output should look like:
DOC_CLASS_CODE DOC_CLASS_DESCRIPTION DOC_SUBCLASS_CODE DOC_SUBCLASS_DESCRIPTION
12 ABC 1 XYZ
2 DFG
Can the same query given yesterday be modifiedDuplicate thread
Re: Problem with SQL query -
Exact time of SQL query execution.
Hi,
Is there any way to get the exact time of execution of particular SQL query.
Oracle Version : 10.2.0.4.0
OS : Sun OS.
Thx,
Gowin.In general it's pretty hard.
Look at V$SQLSTAT.ELAPSED_TIME and DBA_HIST_SQLSTAT.ELAPSED_TIME_TOTAL/DELTA (need a license).
It will give you accurate results for a non-parallel query. For parallel queries you'll get a total time spent by all slaves.
Also you can enable tracing either on database or session level and analyze the trace files generated.
Edited by: Max Seleznev on Nov 4, 2011 12:06 PM -
JSTL : problems with sql:query /forEach tag
I am not able to iterate thru the resultset provided by <sql:query> tag in JSTL. rowcount and columnName works, which means that query does produce a resultset. However, the <c:forEach> tag doesnt display the retrieved data. Code is approx like:
c:catch var="e">
<sql:query var="queryResults" >
select * from emp
</sql:query>
</c:catch>
<c:if test="${e!=null}">The caught exception is: ${e}
${queryResults.rowCount} <br>
<c:forEach var="row" items="${queryResults.rows}">
<tr>
<td> <c:out value="${row.EMPNO}" /></td>
</tr>
</c:forEach>
</table>
Error thrown is :
javax.servlet.ServletException: Unable to find a value for "EMPNO" in object of class "java.lang.String" using operator "."
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:867)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:800)
org.apache.jsp.jsp.sql.query_jsp._jspService(query_jsp.java:92)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
Pls. help!Thanks a lot all. My problem was solved by simply replacing the taglib directive
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
to
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
Cheers!
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