I have 2 tables, AFF_TEMP and COUNTY
AFF_TEMP has the following columns FNAME, LNAME, EMAIL and COUNTY
COUNTY has 2 columns COUNTY_ID and CNAME
Both tables have the following test data
AFF_TEMP
Joe, Bloggs, joe@gmail.com, ''
Ann, Bloggs, anne@gmail.com,Donegal
and COUNTY column in AFF_TEMP can contain a NULL value
County table has the following Test data,
1, Dublin
2, Donegal
3, Tipperary,
4, Galway
I am trying to select the following from both tables FNAME, LNAME, EMAIL, COUNTY_ID.Tried the following queries
select a.FNAME, a.LNAME,a.EMAIL, C.COUNTY_ID FROM temp_aff A LEFT OUTER JOIN COUNTY C ON A.COUNTY=C.CNAME
OR (A.COUNTY IS NULL)
select a.FNAME, a.LNAME,a.EMAIL, C.COUNTY_ID FROM temp_aff A, COUNTY C
WHERE C.CNAME IN (SELECT UPPER(A.COUNTY) FROM TEMP_AFF A)
We have database with multiple fields containing NULL values and in many queries we have NVL function which in turn is suppressing the index usage when in fact it is really essential (selectying very few rows from massive data) instead of creating lot of Function based indexes (NVL) or composite indexes with (nullable_column, constant) I am thinking of settting a default value for most of the fields In that regard I have some queries :
Which approach is better - setting default value for the fields or updating the fields with default value and modyfing inserts to take care of future data? Though altering table and modifing column to set default value looks better considering it will take care of data inserted in the future, it will invalidate the subroutines.I understand in 10g both statement will generate lot of undo (though in 11g, I heard things changed for setting default value of a column) How to take care of all the queries which are using the criteria 'where column1 IS NULL' or 'where column1 IS NOT NULL'. It will be really difficult task to manually change each and every occurrence of such condition even using user_source.
Finally for numeric values say for ID field which starts from 1 onwards 2,3,4 etc, we can set 0 as sensible default so that the performance is not affected.
Is there such precaution for varchar2 field purely from performance point of view?
As I am doing a outer join, if the resource is not available on a particular day the resource_id is coming as NULL as it is not available. Is there any way to populate this NULL resource_id with the original resource_id as the resource_id is same for all the result set.
I don´t care about the order of the values in the row. In other words, I want to get disjoint sets of data connected by any of both values.Every pair in the input table is unique.
I have seen in the web that it is possible to do using connect by and hierarchical retrieving but I've been trying to make a lot of combinationts and I can reproduce the output.
We are working on a migration project and we need to move 75 million rows from source system to target system.
Total number of columns in source system - 90 cols.
Out of the 90 columns 10 cols are system fields and rest 80 are properties for each record.
We are required to migrate all system cols and some required properties. In total we will migrate around 25 columns[10+15] for each record.
Before actaul migration , we need to do a data cleansing activity and hence we move the data to a staging table.
To create the staging table, we considered the below appraoches.
1. Create the staging table with around 30 coloumns so as to fit the data from source system[map the columns based on datatype]
2.Create the staging table with actual columns[90 columns] and import only the required properties. The rest all columns will remain NULL.
Do the data cleansing and move to target system.
My question here is, if we go with approach 2, We will not mix the data, as there will be a one-to-one mapping. But many columns will not have data and remain NULL. Will it affect the performance since we deal with 75 million rows.
I have main query..And i written a Query for Issued Quantity. The query is retrieving exact data. And when i add the Query in main query the data is coming with extra null values.
for ex. Query for Issued Qty fetch 16 records. and i run the main query it fetch 20 records...there r 4 records which issued Qty is null. How can i restrict that records.
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - 64bit Production PL/SQL Release 11.1.0.6.0 - Production "CORE 11.1.0.6.0 Production"
I have Event_month, Event_date in SELECT statement. Results of the query has NULL values as well.. I am doing ORDER BY Event_month, and I want NULL values to be at the top..
SELECT d.event_code_dt, count(d.event_number) count1 FROM main_event a,sec_event d WHERE a.event_id = d.event_id(+) GROUP BY d.event_code_dt ORDER BY d.event_code_dt, count(d.event_number) desc
Results are like this
11-MAY-10 21-MAY-10 22-MAY-10 NULL
And I want results to be like this: NULL 11-MAY-10 21-MAY-10 22-MAY-10
Same thing happens with Event_month NULL Feb 2009 Aug 2009
How can I use OR condition in sql to check whether if the 6 col values in a row is NULL, I need something like below, but idk the syntax of checking if either of the mentioned cols is null using an or condition.
select a.mid FROM table_a a JOIN table_b b ON a.dept = b.dept JOIN table_c c ON b.eid = c.eid WHERE a.tid = :tid AND (a.i1 or a.i2 or a.i3 or a.n1 or a.n2 or a.n3 or a.t1 or a.t2 or a.t3 ) IS NULL
There is a table with column holding 3 NULL values one each in every record. When a count function is applied to the column with a filter on NULLs,it returns 0 instead of 3.
But when count(*)is applied,expected result is returned. Would be interested in knowing about this strange behavior of NULL/Count.
Our organization is attempting to learn more about the partitioning features of Oracle 11g. I've been reading the partitioning manuals, and I have not found a clear answer on this topic, but I suspect I know the answer.
If you create a range partitioned table; using interval partitioning, say something like this:
CREATE table range_parti ( CODE NUMBER(5), DESCRIPTION VARCHAR2(50), CREATED_DATE DATE) PARTITION BY RANGE (created_date) INTERVAL (NUMTOYMINTERVAL(1,'MONTH')) ( PARTITION my_parti VALUES LESS THAN (TO_DATE('01-NOV-2007','DD-MON-YYYY')) );
but you try to insert a null value as the partition key, you get the following error:
SQL> INSERT INTO range_parti VALUES (1,'one',NULL); INSERT INTO range_parti VALUES (1,'one',NULL) * ERROR at line 1: ORA-14400: inserted partition key does not map to any partition Elapsed: 00:00:00.07
Is there no way to tell it to use a default partition for NULL values? Or specifically designate a partition for NULL values WITHOUT having to manually list out each partition? It seems it works if you don't use the INTERVAL keyword, list out your partitions, and use MAXVALUE. However, our hope to avoid having that as it creates monstrously huge DDL statements for tables that have lots of date ranges, and we will be forced to manually add new partitions each month as data is added/time passes.
It appears from my experience so far, if your column can allow nulls, you cannot use interval range partitioning on that column.
I use a cursor to select records from a database table into a C structure as follows...
{ int iLoop = 0; int iResult = 0;
[Code]....
The otc_multiplier field is NULL. As is the to_date sometimes. However, when I output the records later, the entries where the to_date is NULL come out fine (no value). But the otc_multiplier is getting output as 0.0 using...
// this is output later in another fuction using the following.. sprintf(newRecord, "%.1f",daServiceRecs->itemMultiplier);
If using c structures in this manner, what is the method for ensuring that numeric values are set to NULL when required?
I have a report in report 6 which has static field where values are shown for previous year and for current year. the output of the report will be like this
sl no department prev year cur year 01 revenue 2000 5000 02 costing 500 1000 03 excise 8000 900 and so on....
I have a created a fomula field for each and every department and get the value from a particular table. What i require is if suppose the department revenue does not have any value then that row should not be visible. for eg if revenue has a null value then the report should be like this
sl no department prev year cur year 01 costing 500 1000 02 excise 8000 900
I'm using the odp.net type factory (class IOracleCustomType and the specific annotations...) to map udts to c# classes.By now I had no problems with it, because I've never used "ref" attributes within the udts.Now I need the use of "ref" attributes within udts but it seems that the odp factory cannot handle those references.
For example:_*
A Simple Type: create or replace type bookcontent_t force as object ( id number(20) , name varchar2(1000) );*And a collection with references to objects of this type:*
create or replace type fms_bookcontent_ref_cln force as table of *ref* bookcontent_t;The c# class is generated by odp.net.
When I retrieve data by using odp.net I get a collection with the correct number of elements but the values are null.What can I do to solve this problem with "ref" attributes/lists? How can I get the referenced object instances?
SELECT * FROM ( SELECT 1 ORDR_ID, TO_DATE('01-JAN-2012', 'DD-MON-YYYY') INWD_DATE, 5 SIZE_, 'APD' Colr_CD FROM DUAL UNION ALL SELECT 1 ORDR_ID, TO_DATE('15-JAN-2012', 'DD-MON-YYYY') INWD_DATE, NULL SIZE_, 'KPD' Colr_CD FROM DUAL UNION ALL SELECT 1 ORDR_ID, TO_DATE('16-JAN-2012', 'DD-MON-YYYY') INWD_DATE, NULL SIZE_, 'ALD' Colr_CD FROM DUAL UNION ALL SELECT 2 ORDR_ID, TO_DATE('02-JAN-2012', 'DD-MON-YYYY') INWD_DATE, 9 SIZE_, 'APD' Colr_CD FROM DUAL UNION ALL SELECT 2 ORDR_ID, TO_DATE('05-JAN-2012', 'DD-MON-YYYY') INWD_DATE, 10 SIZE_, '' Colr_CD FROM DUAL UNION ALL
[code]....
Where every first row is the initial entry for an order and following rows are the changes done to the order with modification date
Things_t Things Characteristic Char Value Item 1 Colour Red Item 1 Packaging Item 2 Shape Square Item 2 Brand Spunk
Now i want to reterive an item with none of its char values as Null. Using the query “ select distinct things from things_t where char value is Null ” will fetch the item 1 also together with item 2. i want to fetch a record from thing for which none of the char values are Null such as Item 2.
I have a table with multiple rows for the KEY attribute(its not a primary key) and a Rank for each row.
I want a query which fetches one row per KEY attribute.The row with lesser Rank should be considered. But in-case if the value is null for any column the value for next Rank should be considered.
WITH TMP_TBL AS ( SELECT * FROM ( SELECT 'A' DUN,'1' RNK,'A21' col1,NULL col2,'A41' col3,NULL col4 FROM dual UNION ALL SELECT 'A','2','A122','A23',NULL,NULL FROM dual UNION ALL SELECT 'A','3','A32','A33',NULL,'A35' FROM dual [code].......
DUN is the KEY attribute . RNK is the Rank for each Row. COL1... COL4 are data attributes
I want this to be done with SQL only. So I tried various ways but none were successful.Finally I created a Multi Row function row_nvl and it worked.
SELECT DUN, row_nvl(rownvl_param_type(RNK,col1)), row_nvl(rownvl_param_type(RNK,col2)), row_nvl(rownvl_param_type(RNK,col3)), row_nvl(rownvl_param_type(RNK,col4)) FROM TMP_TBL GROUP BY DUN
But I don't think my manager will allow me to deploy a Multi Row function .
I am using sql loader to load data to tables from tab delimeted files.
Here the problem is that the sql loader is not handling null values. If there is any null value in the flat file it is moving the field values to left and loading to the table. I am using NVL function to handle the null values, but it is not working.
My control file is: LOAD DATA INFILE 'C: da_poc_filesSQL_scriptsSourcefilesTRADEGLOBNODE1.TXT' BADFILE 'C: da_poc_filesSQL_scriptsBadfilesTRADEGLOBNODE1.bad' DISCARDFILE 'C:C: da_poc_filesSQL_scriptsDiscardfilesTRADEGLOBNODE1.dsc'
[Code]....
Source file is attached to this link For the attached file in the first record, tradedate value is coming in to tradeprice field
i am doing a data transformation using the following function
FLOOR(ONSET_TPQ-VAX_DATE)
Where ONSET_TPQ and VAX_DATE are both dates. Now in a situation where the ONSET_TPQ precedes VAX_DATE I want the result to be null for those records. As an example if ONSET_TPQ= 2000 and VAX_DATE=2010
I want the result to be NULL as I dont want negative values. Any exact SQl syntax on how to do that. DO i write a case statement?
I am using left outer join to fetch PRSN_KEY .I need to find null values in B.PRSN_KEY. I am using below query but its giving me 0 count.
select count(*) from ( Select A.PRSN_KEY AS AKEY,B.PRSN_KEY AS BKEY from CD03955P.H_CM_EEST_EEOR A LEFT JOIN CD03955P.H_CM_EEST_EEOR B ON A.PRSN_KEY =B.PRSN_KEY where A.CAT_ID=111 AND A.DATA_SOURCE='PEN_CO' AND B.CAT_ID = 1 and B.DATA_SOURCE ='PEN_EEST' AND B.CAT_CD IN ('ACTIVE','LOA','LOAWP','LOAMLP','LOAMLN') AND B.EFBEGDT < A.EFBEGDT ) where BKEY IS NULL
I dont want to print the repeated value(NAME) of C1 multiple times as below.
C1C2C3C4 NAMEJOHN10ABC SMITH30DEF ROBERT60XYZ
I could do it using the below query using union with the rownum.
select * from ( select rownum rn, c1,c2,c3,c4 from table_new ) where rn =1 union select * from ( select rownum rn, decode(c1,null,null),c2,c3,c4 from table_new ) where rn between 2 and 3
Is there any other way of displaying using a single sql query.
I'm having a problem with null values. I want to display old student in a display item if subjects text item has records. Otherwise, display new student if it has null values. This is the code that i tried so far..
IF :block2.subjects IS NULL THEN :block3.type := 'NEW STUDENT'; ELSE :block3.type := 'OLD STUDENT'; END IF;
I should get values as 0, -34 and 77. But I don't get this as all operations with null gives null. These are fetched data and don't exist in the form shown. I have to use these row values of "Change" further. Is there any way of obtaining these results?
