SQL & PL/SQL :: Query Using DBLink Returns More Rows Than Direct Query?
Apr 6, 2010
I have a query that is pulling back more rows when I use the dblink than when I hit the linked database directly.
For example:
select
x,y,z
from
mytable@dblink
returns 788,324 rows
while
select
x,y,z
from
mytable
returns 712,102 rows
It's the exact same query, with the only difference being the dblink. It's not pulling the data into a cursor or array, it's a simple, straightforward query on a remote database.
I am interested if there maybe exists any function that would return all source tables that are present in the given sql. For example function('select 'abc' from table_1, table2') would return a list containing 'table_1' and 'table_2'.
In my main query, There is a single row sub query which returns row with del_flag as N. Now in my table, there are 2 rows getting added from the incoming feed with del_flag as Y & N.
Here is my Table:
ID_1 DEL_F ID_2 ------------------------------- 16643162 Y 49696 16643162 N 16643162 16612344 Y 98888
So how can i write a single row sub-query which returns ID_2 value of a row with del_flag as N. If there is no row with DEL_F as N, it should return ID_2 value of row with DEL_F as Y.i have tried below query, but it showing the error.
select (case when min(del_f)='N' then to_number(ID_2) when min(del_f)='Y' then to_number(ID_2) end ) ID_2 from table where ID_1=?
Id Country city 1 US 2 US Boston 3 Boston 4 US Newyork 5 London 6 Japan Tokyo
Im looking for a query which returns results based on both city and country passed.
If i pass country US and city Boston it should return row2 with US and Boston row If i pass country null and city Boston it should return row3 If i pass country UK and city Boston it should return row3 If i pass country UK and city London it should return row5
i.e. If country/city combination exists in DB return that row Else city row should be returned.
I need to create a query that returns record by record a field qty_progr with the cumulate qty considering previous records. The result should be the following:
I have one issue with the converting columns into rows.
Employee table has manager , additional manager and some other columns. If the employee has additional manager, then i need those employee record with 2 rows : 1st row - manager with other data , 2nd row - additonal manager with other data .
Orginal data is like this:
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ADDTIONAL_MGR ---------- ---------- --------- ---------- --------- ---------- ---------- ---------- ------------- 7369 SMITH CLERK 7902 17-DEC-80 800 20 7698
[code]....
I have tried this , using UNION ALL method, But it is taking more time.
SQL> ED Wrote file afiedt.buf 1 SELECT DECODE (DUMMYTAB.NUM,'1',MGR, '2',addtional_mgr) MANAGER, empno, ename, job, hiredate, sal, comm, deptno 2 FROM emp E, (SELECT '1' NUM FROM DUAL UNION ALL SELECT '2' NUM FROM DUAL) DUMMYTAB 3* WHERE addtional_mgr IS NOT NULL SQL> /
I have 2 tables with 3 common columns (Col1, col2,Primary). One common column name is primary (oracle key word).Around 2 lakhs rows to be updated and No indexes are used on these tables. I need to write an update query as shown below.
CREATE TABLE group_device ( group_id NUMBER (8) NOT NULL , member_id NUMBER (4) NOT NULL , device_id NUMBER (10) NOT NULL , install_date DATE NOT NULL , remove_date DATE );
I have seen lots of examples of using PIVOT to return an sql query where the rows have been converted to columns. All the examples I can find require you to have two columns with multiple rows, and also require you to know the data which is in one of columns to make titles for the new columns.
I need something a little different...I have a query using UNION which goes something along the lines of...
SELECT [get data from one place] UNION SELECT [get data from another place] UNION SELECT [get data from another place]
this returns the following... a_val ----- 100 200 300
query to return something like this... a_val1 a_val2 a_val3 ------ ------ ------ 100 200 300
The names of the columns don't really matter. And I dont want to create a new table in the database just for the result.
SELECT LOC_CD, TO_CHAR(DT,'fmMon RRRR'), SUM(QTY) , GROUPING_ID(LOC_CD) FROM WIP WHERE LOC_CD IN (1,2,3,4) GROUP BY ROLLUP(LOC_CD), TO_CHAR(DT,'fmMon RRRR'),TRUNC(DT,'MM') ORDER BY TRUNC(DT,'MM'),LOC_CD
This query result attached
The red coln is the total I want to place it in row-wise
Date loc_1 loc_2 loc_3 loc_4 Total May 2012 4,554 6,644 11,198 June 2012 4,986 5,838 777 11,601 22,799
I need a single select query which converts all the rows into a single value . Below is my requirement :
Create table email_tbl(emailid varchar2(30)); insert into email_tbl('1@y.com'); insert into email_tbl('2@y.com'); insert into email_tbl('3@y.com'); insert into email_tbl('4@y.com');
Now , I need a single select query which gives me the below results.
1@y.com,2@y.com,3@y.com,4@y.com
I have done the above by using a cursors in the pl/sql objects.But want to achieve this with a single sql/query.
The "HAVING" statement from the query below removes all rows where the "name" field starts with "Port" and it removes all rows where count is less than 11. What I want is to removes all rows where the "name" field starts with "Port" and the count for that row is less than 11.
SELECT deviceEventClassId "Event ID", deviceAddress "Device Address", name "Event Name", deviceHostName "Device Host Name", count( concat(deviceEventClassId, deviceHostName, name)) "Count" FROM events WHERE (deviceVendor = "Bilbo" and
The table has single column & the values may differ,that is, they may have 1-2-3-...-n in a single row, but the desired output is to be in the rows as shown above.
I tried concepts of SQL up to my knowledge, but I failed. The query to be done only in SQL.complete this query.
