Add Column name conditionally in a query

Hi i have an stored procedure where one parameter is passing
@Type
UserTable (columns) => username, canAdminDelete,canCustomerDelete,CanMerchantDelete
i wants to add column conditionally like when usertype =1 then query should be like
Select * from userTable where canAdminDelete=0
when userType=2
Select * from userTable where canCustomerDelete=0
Like in this way. I know i can write three if statments and write specific query.
But this is just an example i have very big query actually.
Please give some idea.
Thanks
Niki

Hi Niki,
As per my understanding, I think the query post by Olaf is correct. It only return the results when column canAdminDelete = 0 and userTpe = 1 or column canCustomerDelete = 0 and userType = 2.
So when userType=1 and column canAdminDelete=1, how could you get the results? Could you please test the issue again based on the query post by Olaf.
If there are any misunderstanding, please elaborate the issue for further investigation.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support

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Setting Column Names in Dynamic Pivot Query

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Workspace: MYHOSTACCT
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Hi Tony,
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v_as         VARCHAR2(4);
v_range_from NUMBER;
v_range_to   NUMBER;
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v_range_to   := :P1_FY_TO;
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UKJA@ukja102> set serveroutput on
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Table dropped.
Elapsed: 00:00:00.03
UKJA@ukja102> create table t1(c1 int, c2 int);
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UKJA@ukja102>
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3    t1.c1, t1.c2, v.cnt
4 from t1,
5    (select /*+ no_merge */ c1, count(*) as cnt
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10 ;
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2 /
PLAN_TABLE_OUTPUT
Plan hash value: 536125944
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Björn

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TheHexLord

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How to pull only column names from a SELECT query without running it

How to pull only column names from a SELECT statement without executing it? It seems there is getMetaData() in Java to pull the column names while sql is being prepared and before it gets executed. I need to get the columns whether we run the sql or not.

Maybe something like this is what you are looking for or at least will give you some ideas.
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                    throw (_oraEx); // Actually rethrow
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Deciphering column names in a join query using jdbc

hi all....
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i want to go with the later approach where my query would be forming a join. The problem comes when table involved in this join has columns with the same name. for eg if a column "NOTE" is there in table A as well as table B on which i have a join. Resultset returns me with two "NOTE" columns and i cannot recognize which one belongs to which table.
all API calls including getString("Note") seems to be referring to the first occurence of "Note" column.
Also getTableName() and getSchemaName() APIs on resultsetMetadata doesnt return in anything in case of joins.
Any pointers would be most appreciated.
cheers
vivek

thanks for suggesting this solution ... though i had thought of the same onece .... unfortunately i cannot implement something like this coz out of the result set i have to instantiate an object hierarchy depending on the schema ....
this also puts me in a doubt whether i can use join in my case.
for eg ... .
lets say we have a customer talbe and and address table which has one to many relationship .... one contact can have multiple addresses.
Assuming a contanct "Joe Bloggs" having 3 addresses ...a query like following
select contact.firstname contactfirstname , address.streetname addressstreetname from contact , address where contact.contactid = address.contactid
this would return me 3 rows and i can also recognize various columns with their aliases ..
but i would lose an important fact that i have to create one java object for contact class and 3 instances for addresses which i have to return finally.
this means that i would like to return an object hierarchy with one contact object and 3 address object underneath it linked with contactid.
Any other suggestions after reading the complete requirement are most welcome ...sorry for not puting the entire thing at first.
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Overall, I want a common search view across all the user such that each user doesn't have to create a custom search view.
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hi
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Node Relation Higher level node
BTAdminH
BTBOSSet BTHeaderBOSSet BTAdminH
BTSubjectSet BTSubjectSet_A BTBOSSet
BTSubject BTSubjectAll BTSubjectSet_A
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Passing column name inside an update query

Hi,
To checking if there any number field present in 'ID' column, I am using the follwing query.
UPDATE table1
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WHEN REGEXP_LIKE(
ID,
'^( *)(\+|-)?((\d*[' || SUBSTR(VALUE,1,1) || ']?\d+)|(\d+[' ||
SUBSTR(VALUE,1,1) || ']?\d*)){1}(e(\+|-)?\d+)?(f|d)?$','i'
) THEN 1
ELSE 0
END
FROM NLS_SESSION_PARAMETERS
WHERE PARAMETER = 'NLS_NUMERIC_CHARACTERS'
Now I need to extend this query to check 10 more columns from table1. How can modify the above query to pass that 10 columns the above query.
Thanks

Got it ! Then again your syntax is incorrect... You should use correlated subquerry
UPDATE table1
   SET COL1 = 'Y'
WHERE 0 =
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                     WHEN ID IS NULL
                     THEN
                        1
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                                '^( *)(\+|-)?((\d*['
                             || SUBSTR (VALUE, 1, 1)
                             || ']?\d+)|(\d+['
                             || SUBSTR (VALUE, 1, 1)
                             || ']?\d*)){1}(e(\+|-)?\d+)?(f|d)?$',
                             'i')
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                        0
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BEGIN
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Given a query, I want to extract all the column names/aliases in the query in a case-sensitive way.
When I use dbms_sql.describe_columns() or java.sql.ResultSetMetaData classes getColumnName() or getColumnLabel()
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l_cur NUMBER;
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As far as the result set is concerned, though, the column name is in all upper case. If you query the data dictionary, you would see that the TARGET_TYPE column in the TARGETS table is stored in upper case.
The way Oracle works is that column names that are not enclosed in double-quotes are converted to upper case in the data dictionary and elsewhere and then Oracle looks for the column name in the table definition. That is what allows Oracle to have case-insensitive identifiers unless a user specifies case-sensitive identifiers by enclosing the identifier in double quotes.
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How to make dynamic query using DBMS_SQL variable column names

First of all i will show a working example of what i intend to do with "EXECUTE IMMEDIATE":
(EXECUTE IMMEDIATE has 32654 Bytes limit, which isn't enough for me so i'm exploring other methods such as DBMS_SQL)
-------------------------------------------------CODE-----------------------------------
create or replace PROCEDURE get_dinamic_query_content
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list_fields IN VARCHAR2) --list of the columns name belonging to the query ( arr_list(1):='name';   arr_list(2):='age';
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I'm attepting to use DBMS_SQL to perform similar instructions.
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Hi Pedro
You need to use DBMS_SQL here because you don't know how many columns your query is going to have before runtime. There are functions in DBMS_SQL to get information about the columns in your query - all this does is get the name.
SQL> CREATE OR REPLACE PROCEDURE get_query_cols(query_in IN VARCHAR2) AS
2 cur PLS_INTEGER;
3 numcols NUMBER;
4 col_desc_table dbms_sql.desc_tab;
5 BEGIN
6 cur := dbms_sql.open_cursor;
7 dbms_sql.parse(cur
8 ,query_in
9 ,dbms_sql.native);
10 dbms_sql.describe_columns(cur
11 ,numcols
12 ,col_desc_table);
13 FOR ix IN col_desc_table.FIRST .. col_desc_table.LAST LOOP
14 dbms_output.put_line('Column ' || ix || ' is ' ||
15 col_desc_table(ix).col_name);
16 END LOOP;
17 dbms_sql.close_cursor(cur);
18 END;
19 /
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SQL> exec get_query_cols('SELECT * FROM DUAL');
Column 1 is DUMMY
PL/SQL procedure successfully completed.
SQL> exec get_query_cols('SELECT table_name, num_rows FROM user_tables');
Column 1 is TABLE_NAME
Column 2 is NUM_ROWS
PL/SQL procedure successfully completed.
SQL> exec get_query_cols('SELECT column_name, data_type, low_value, high_value FROM user_tab_cols');
Column 1 is COLUMN_NAME
Column 2 is DATA_TYPE
Column 3 is LOW_VALUE
Column 4 is HIGH_VALUE
PL/SQL procedure successfully completed.I've just written this as a procedure that prints out the column names using dbms_output - I guess you're going to do something different with the result - maybe returning a collection, which you'll then parse through in Apex and print the output on the screen - this is just to illustrate the use of dbms_sql.
best regards
Andrew
UK

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One might have hoped that the QA guy actually had sufficient documentation to tell him which table information was "pulled from".
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Retrieving Column Names from a Query

I need to be able to generate XML that looks like this:
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How to write a Query a table and the return result is the column name

Hi All
Pls advise how to write a query whereas the return result is the
column name.
I know there is describe <table_name>;
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Pls advise
Tj
Edited by: user600866 on Oct 14, 2008 12:13 AM

Data Dictionary table user_tab_columns has all the column names. You can query that and get what ever you want.
To get the column list of a table just query
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from user_tab_columns
where table_name = <your_table>Edited by: Karthick_Arp on Oct 14, 2008 12:18 AM

Add Column name conditionally in a query

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