SQL & PL/SQL :: How To Get Latest Record In Embedded Select Statement
Mar 12, 2013
I am trying to run an Oracle report with a query that has an embeded sql. this sql is returning more than 1 row, and the report is failing.
I need to pick the latest record entered that this sql return.
I tried rownnum and it works but only i can get the rown num I specify, not the latest record. I try to order, but I am getting an error back.
select w.emp_no, (select t.timestamp
from tob.work_unit t
where t.work_date = to_date('20130312', 'YYYYMMDD')
and rownum = 1
order by t.timestamp desc)
,w. spare_type
from work.work_unit w
where w.work_date = to_date('20130312', 'YYYYMMDD')
I am getting missing right parenthesis at the order by keyword My report is much complex than this, but I am tring to see if I can get the row that I want.
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Sep 21, 2011
I want to know like How we can select the latest updated record from xyz table. that record has STATUS column. I also want to check if the status is RED or GREEN query should return if the status is red then 1 and if the status is GREEN then it should return 0
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Jul 21, 2010
I've been examining som old queries in an existing db due to more and more problems regarding performance. The sql is used as backend for a java/jboss web application with the possibility for users to enter data. With more and more data, there starting to come complaints about the performance.
I stumbled upon a select query with an embedded cursor similar to this :
select id, name ...,
cursor(select id, sequence.... from table2),
cursor(select id, name.... from table3)
from table1
join table4 on (table1.id = table4.id)
where .....
The javacode is a prepared statement with the actual sql as a string and the content of the cursors saved in conjunction with each row.
when i use sqldeveloper to show the explain plan without the cursors, the cost is 2428
when i use sqldeveloper to show the explain plan with just 1 of the cursors, the cost is ~165000
Is there a better way to do this instead of cursors ?
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Feb 4, 2011
I tried to post this issue earlier but it was not very clear. Well. Let me try to put in more better way.I have four tables storing order & customer information.
For given order number and cust _id I need to display latest record. here are my four tables.
SQL> select * from so;
ORD_NO ORD_DATE CUST_ID
---------- --------- ----------
1 01-JAN-10 10
2 02-JAN-09 20
3 03-FEB-11 30
SQL> select * from sol;
FK_ORD_NO FK_CUST_ID CUST_NAME LOCATION
---------- ---------- ------------------------- ----------
1 10 abc MA
2 20 xyz CA
3 30 ijk LA
[code]...
There will be a stored procedure that will take order_no and cust_id as input paremeters and return out ref cursor.
create procedure P1( in_ord_no in number,
in_cust_id in varchar2,
out_cur out sys_refcursor);
Here is the expected output.
Case 1 - in_ord_no =4 , in_cust_id = 10
Expected output - Empty cursor. Because bothe tables does not have matching record.
Case 2- in_ord_no = 3 in_cust_id = 30
Expected output =
[code]...
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Mar 17, 2011
DROP TABLE TESTING CASCADE CONSTRAINTS;
CREATE TABLE TESTING
(
DATAPERIOD DATE,
EMPLID VARCHAR2(20 BYTE),
B_OS_REASON VARCHAR2(9 BYTE)
)
TABLESPACE USERS;
[Code] ........
SQL> select * from testing order by 1;
DATAPERIO EMPLID B_OS_REAS
--------- -------------------- ---------
01-OCT-10 2387972
01-NOV-10 2387972
01-DEC-10 2387972 XXXXXX
01-JAN-11 2387972
01-FEB-11 2387972
In the above result, We need to go from bottom up and when we hit some value we need to update with the lastest record as below.("Blank" space are considered as null.)
DATAPERIO EMPLID B_OS_REAS
--------- -------------------- ---------
01-OCT-10 2387972
01-NOV-10 2387972
01-DEC-10 2387972 XXXXXX
01-JAN-11 2387972
01-FEB-11 2387972 XXXXXX
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Sep 1, 2010
Am working on a workbook to count the number of enrolments and withdrawals in the program. My data looks like this
name semester status year
A 1 enrol 2010
A 2 withdraw 2010
A 3 enrol 2010
B 1 enrol 2010
B 2 withdraw 2010
I want to count their latest status only. It should come up with
Total Enrol - 2
Total Withdrawn - 1
For total Withdrawn, I tried 'rank' and filter to equals 1 but it does not allow me. Is there any way to have this work?
Here's my calculation:(decode((FIRST_VALUE(status) OVER(PARTITION BY year, name ORDER BY semester DESC)),'withdraw', name)) It tells me that 'Aggregation of Analytic function not allowed'
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Apr 3, 2012
I would like to retrieve only the latest repair information based on the latest date regardless of the other information, so I would like to query only items 3 and 5 in the following example.
drop table a;
create table a(
seq number,
custom_id number,
repair_id number,
repair_date date);
[code]........
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Sep 13, 2013
In the following merge statement in the USINg clause...I am using a select stament of one schema WEDB.But that same select statement should take data from 30 schemeas and then check the condition below condition
ON(source.DNO = target.DNO
AND source.BNO=target.BNO);
I thought that using UNIONALL for select statement of the schemas as below.
SELECT
DNO,
BNO,
c2,
c3,
c4,
c5,
c6,
c7
[code]....
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Jul 4, 2010
i want to select dynamic column names in my select statement in my function.
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Jan 11, 2012
I am using JDBC to run a few queries from my Java program (multi-threaded one).I am facing an issue where a select statement is blocking a delete statement. From the java code point of view, there are 2 different threads accessing the same tables (whith different DB connection objects).
When the block occurs (which i was able to find out from the java thread dump that there is a lock on oracle), the below is the output:
SQL> SELECT TO_CHAR(sysdate, 'DD-MON-YYYY HH24:MI:SS')
2 || ' User '||s1.username || '@' || s1.machine
3 || ' ( SID= ' || s1.sid || ' ) with the statement: ' || sqlt2.sql_text
||' is blocking the SQL statement on '|| s2.username || '@'
4 5 || s2.machine || ' ( SID=' || s2.sid || ' ) blocked SQL -> '
6 ||sqlt1.sql_text AS blocking_status FROM v$lock l1, v$session s1, v$lock l2 ,
7 v$session s2,v$sql sqlt1, v$sql sqlt2
8 WHERE s1.sid =l1.sid
9 AND s2.sid =l2.sid AND sqlt1.sql_id= s2.sql_id
AND sqlt2.sql_id= s1.prev_sql_id AND l1.BLOCK =1
10 AND l2.request > 0 AND l1.id1 = l2.id1 AND l2.id2 = l2.id2;
[code]...
From the above it can be seen that a select statement is blocking a delete. Unless the select is select for Update, it should not block other statements is not it ?
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Dec 29, 2010
Why Blind select is better than Conditional select Statement?
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Jan 12, 2011
If i inserted the values in table it gets inserting very few rows only.I dont know y it is?
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Jun 26, 2012
I have the following tables: First one (PART) is the master and other 2 are children.I need to create query that would link both children to the parent. So I was thinking about using embedded refcursor (since my function returns a ref cursor).
on using this ? Is this ok or any other better way of doing this ?
TABLE PART
PART_ID, PART_NAME
TABLE ABC
ABC_ID,PART_ID
[code]...
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Mar 22, 2013
simply select and works great:
select 'CARAT Issue Open' issue_comment, i.issue_id, i.issue_status, i.issue_title, i.ISSUE_summary ,i.issue_description, i.severity,gcrs.Area_name, gcrs.sector_name,
substr(gcrs.stream_name,1,case when instr(gcrs.stream_name,' (')=0 then 100 else instr(gcrs.stream_name,' (')-1 end) ISSUE_DIVISION,
case when gcrs.STREAM_NAME like 'NON-GT%' THEN 'NON-GT' ELSE gcrs.STREAM_NAME END as ISSUE_DIVISION_2
from table(f_carat_issues_as_of('31/MAR/2013')) i inner join v_gcrs_with_stream gcrs on i.segment_id = gcrs.segment_id
where UPPER(ISSUE_STATUS) like '%OPEN%'
Now I want to callte two columns:ISSUE_DIVISION and ISSUE_DIVISION_2
if they are equal in new columns should be value 1 if are not equal should be 0,how can I do it ?
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May 30, 2012
Based on ACCOUNT_NUMBER column we have to check the GUID data in test table.
for example ACCOUNT_NUMBER =11 as duplicate it has 2 values then only, we need to check the corresponding GUID if any occurence ("9f680174-cb87-4f71-887a-92" and "9f680174-cb87-4f71-887a-91"),
we should select,if not leave it.
CREATE TABLE test
(
GUID VARCHAR2(32 BYTE),
ACCOUNT_NUMBER NUMBER(30),
INDIVIDUAL_ID NUMBER(13)
)
[Code]...
it tried as like as below it's working.
select t2.* from (select distinct t1.guid
from test t1,( select ACCOUNT_NUMBER from test
group by ACCOUNT_NUMBER having count(ACCOUNT_NUMBER
[Code]...
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Aug 12, 2012
Using a cursor and loop method records are inserted into the header and line tables. How do I code the IF statement prior to the INSert statement such that Insert if record does not exist else Update the record. If the record for insert fails in the line, the same record should be deleted from the header table as well and transaction should rollback. The Ora version used is 11.2.0.2.
CURSOR C1 IS
SELECT H.*
FROM rex_head_extract h
WHERE TRUNC(h.create_date) BETWEEN v_begin_date AND v_end_date;
FOR I IN C1 (v_begin_date, v_end_date)
[Code]....
--- Need to perform a check if record exists here prior to insert
INSERT INTO tran_head
(TRAN_SEQ_NBR, ORG_NUMBER,
STORE_NUMBER, TRAN_DATE,
[Code]....
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May 5, 2010
I have a question about select statements, as I am new to them and don't know how to work all the commands yet.
I'm making a select statement that is about half right... it is shown below:
select t.warehouse_id,
t.quantity_on_hand,
c.product_name
from pahtest3.inventories t
join pahtest3.product_information c using (product_id)
WHERE warehouse_id in (7);
I need to take this select statement and make it so it shows all the products that don't have any quantities in the warehouse in addition to the ones that are already being shown in that select statement.
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Jun 15, 2007
decode (a.cancel_time,'',sum ((to_date('23:59','hh24:mi') - a.alarm_time)*24*60), sum((a.cancel_time - a.alarm_time)*24*60)) Duration,
After executing this statement. I get negative values if cancel time is null
I want to subtract alarm_time by 24 hours, if cancel time is null. If not null then cancel-time - alarm_time
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Aug 23, 2008
how to set the timing on for all SELECT statements in a procudeure...and i want that should come as a output for very SELECT statement slong with my original output.
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Sep 1, 2011
I have a need to use the Alias name of a column within the same select statement( because I can't have another select statement using the first select as table - BO tool limitation).
Ex:
Select dept_id, agency, sum(quantity) as "sum_qty"
where sum_qty > 500;
Currently oracle won't allow using alias name Sum_qty in the same select statement. Is there a way to use alias within the same select statement?
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Jul 5, 2011
I'm trying to write a simple query so I can do some testing on my application. I am trying to do something like this:
SELECT
Location,
LEVEL,
FROM
S_ORG_EXT
where
Location = 'North America' and LEVEL ='Software'
OR location = 'North America'
and Active = 'N'
in the where statement, I have put in the 'Active' that isn't a column. I want to be able to be able to change that in the select part. But I am not able to do so.
this is what I have tried:
SELECT
Location,
LEVEL,
Active = 'N' --I want to change this in the to N or Y so I can get different results.
FROM
S_ORG_EXT
where
Location = 'North America' and LEVEL ='Software'
OR location = 'North America'
and Active = 'N'
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Feb 11, 2011
I have the following tables:
create table lookups (code varchar2(20), amount number);
insert into lookups values ('Rent' , 500);
insert into lookups values ('Breakpoint' , 10);
create table products (id number, cost number, year varchar2(4));
insert into products values (1, 1000, '2011');
insert into products values (1, 2000, '2011');
insert into products values (2, 100, '2011');
insert into products values (3, 50, '2011');
commit;
I want to write a query which lists the IDs and the sum(cost), and a Y/N indicator which is set to 'Y' IF sum(cost) > ( (lookups.rent value) * (100 - lookups.breakpoint value))/100
I have written this query:
SELECT id,
sum(cost)cost,
year,
CASE
WHEN cost >
((SELECT amount
[code]....... ORDER BY id;
This returns
ID COST YEAR YN
--------- ---------- ---- -
1 1000 2011 Y
1 2000 2011 Y
2 100 2011 N
3 50 2011 N
The YN is correct, but it needs to sum the amounts. So there should only be one row for id1 = 3000.e.g.
ID COST YEAR YN
--------- ---------- ---- -
1 3000 2011 Y
2 100 2011 N
3 50 2011 N
I am not sure how to do this. Or is there a better way of doing this than using CASE.
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May 6, 2011
Below is the query that I have:
Quote:
select a.contact, b.db_name
from MOM.db_contacts@DB_LINK a, MOM.databases@DB_LINK b,
where a.DB_ID=b.DB_ID
and b.DB_name=(SELECT unique substr(upper(t.target_name), 1, instr(t.target_name,'_',1,1)-1)
FROM mgmt_targets t JOIN mgmt_current_severity s
ON s.target_guid = t.target_guid
WHERE t.target_type = 'oracle_database'
and UPPER(t.target_name) like '%11GDB%');
How can I add two more columns into the select statement and the two columns are in the tables that were in the sub query..I would like to have something like this:
Quote:
select a.contact, b.db_name, COLUM1, COLUMN2
from MOM.db_contacts@DB_LINK a, MOM.databases@DB_LINK b, mgmt_targets t, mgmt_current_severity s
where a.DB_ID=b.DB_ID
and b.DB_name=(SELECT unique substr(upper(t.target_name), 1, instr(t.target_name,'_',1,1)-1)
FROM mgmt_targets t JOIN mgmt_current_severity s
ON s.target_guid = t.target_guid
WHERE t.target_type = 'oracle_database'
and UPPER(t.target_name) like '%11GDB%');
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Apr 28, 2010
I have a cursor in a procedure that selects columns from a table on a remote Oracle database using a database link. It all works fine when the table name and database link name is 'hard coded' into the procedure but what I would like to achieve is have the select statement lookup the table name and database link name from a column in another table. See example below
CURSOR c_total_bookings IS
SELECT personnel_id,
surname,
forenames,
birth_date,
[code]...
What I would like to do is replacecompany_bookings@remote.linkwith a variable that takes its value from another table.
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Jun 24, 2011
select GAM.FORACID,
SOL.SOL_DESC,
GAM.ACCT_NAME,
LHT.LIM_SANCT_DATE,
LHT.SANCT_LIM,
to_char( GAM.CLR_BAL_AMT,'9,99,999.99'),
[code]...
i am getting error like this
ERROR at line 9:
ORA-00911: invalid character
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May 3, 2013
Execute Immediate on SELECT Statement
declare l_stmt VARCHAR2(1000);
begin
l_stmt := 'Select * from mytable' ;
EXECUTE IMMEDIATE l_stmt;
--- dbms_output.put_line( l_stmt);
end;
it is not returning any output. I have hardcoded the table name here where as in real time Mytable name will differ.
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Feb 19, 2013
I was given a SQL query to develop another query that will need to do something similar. The query I was given I believe is a stored procedure. It is PL/SQL and has a SELECT statement that looks like
SELECT :var1 AS var1
FROM t1
WHERE
:var1 = 1
In the past I have seen where variables can be used in the WHERE clause like
SELECT c1
FROM t1
WHERE
c1 = :my_column_valueand this makes sense to me.
Usually :my_column_value is declared in the DECLARE block of the PL/SQL. In the query I was given, :my_column_value is not declared in any DECLARE blocks (maybe I wasn't given the entire code??). But even if it was, that would be even more confusing because in the DECLARE block it could be assigned one value and then set to another value in the WHERE clause???
The first query doesn't make sense to me and when I run it as plain SQL I get an error like "SP2-0552: Bind variable "var1" not declared. I am guessing that such a syntax is not valid for regular SQL?
The only thing I can gather that the first query does is something along the lines of
SELECT 1 as var1
so it will output a 1 for every row. Not always that interesting of a query, but it is needed sometimes, I know. But I still don't understand this type of assignment.
So what's going on here? I'd be happy to look it up and read about it myself, but I don't know what to search for.
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Nov 12, 2013
i want a select statement to retrieve the last name added into the "ename" column .i mean :if i insert "jack" into "ename" column , i want to write a select statement to retrieve that last name while i do not know it is jack or any other name ?
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Sep 14, 2013
How to use a function with DML operations in it in a select statement.
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Apr 22, 2013
I am trying to find the best solution for the following problem
I have a table called HIERARCHY with 3 columns.
col1 col2 col3
------------------------
1
1 2
1 2 3
4 5
6 7 8
I would like to check if the table contains invalid records. Col1 , Col2 and Col3 are seen as hierarchy levels and col1 is the top level.
For instance record 1,2,3 (level3) is valid because it exists record 1,2 (level 2). Moreover 1,2 record (level 2) is valid because it exists record 1 (top level).
However 4,5 and 6,7,8 are not valid as higher levels are not completed.
How can I check in a single SELECT statement if the table contains invalid records? Maybe analitical functions or regular expressions?!
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