Getting the column names dynamically
hi gurus,
i have list item populated with many table names from a schema.
i have grid in oracle forms 10g and i want to fill the grid with the data that should come at least four/more columns.
i want to fire the list change trigger when each time any one table name is selected/changed.
how can i get the column names dynamically
please give me the step by step process
for filling the grid..
hi ,
by getting column names dynamically i am creating a record group
using this below query
SELECT COLUMN_NAME, DATA_TYPE FROM USER_TAB_COLUMNS WHERE TABLE_NAME = <table_name>
but when timestamp datatype is there then it is showing error cannot create group groupname
but the record group is running successful on varchar2,number,date dayatypes
if any alternative is there i mean to say without using record group then tell me or where is the problem
Similar Messages
-
How to get the column names of the table into the Dashboard prompt
how to get the column names of the table into the Dashboard prompt
Thanks & Regards
Kishore PHey john,
My requirement is as follows
I have created a Rank for Total sales by Region wise i.e RANK(SUM(Dollars By Region)) in a pivot table.
My pivot table looks like this
COLUMN SELECTOR: TOTAL US , REGION , DISTRICT , MARKET
---------------------------------------------------- JAN 2009 FEB 2009 MAR 2009
RANK REGION DOLLARS DOLLARS DOLLARS DOLLARS
1 CENTRAL 10 20 30 40
2 SOUTHERN 10 30 30 70
3 EASTERN 20 20 20 60
4 WESTERN 10 20 30 40
When i select the District in column selector
Report has to display rank based on Total Sales by District. i.e
------------------------------------------------- JAN 2009 FEB 2009 MAR 2009
RANK DISTRICT DOLLARS DOLLARS DOLLARS DOLLARS
for this i need to change the fx of rank i.e RANK(SUM(Dollars By Region)) to RANK(SUM(Dollars By District)) and fx of Region i.e Markets.Region to Markets.District dynamically.
so , i need to capture column name of the value selected from the column selector and dynamically i need to update the fx 0f RANK & fx of region.
do you have any solution for this?
http://rapidshare.com/files/402337112/Presentation1.jpg.html
Thanks & Regards
Edited by: Kishore P on Jun 24, 2010 7:24 PM
Edited by: Kishore P on Jun 24, 2010 7:28 PM -
Reading csv file how to get the Column name
Hi,
I am trying to read a csv file and then save the data to Oracle.
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection c = DriverManager.getConnection("jdbc:odbc:;Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq=.;Extensions=csv,txn");
Statement stmt = c.createStatement();
ResultSet rs = stmt.executeQuery("select * from filename.csv");
while(rs.next())
System.out.println(rs.getString("Num"));
My csv file looks like this:
"CHAM-23","COMPANY NAME","Test","12",20031213,15,16
Number,Environ,Envel,Date,Time
"1","2",3,"4",5
"6","7",8,"9",9
Now is there anyway using the above code I start processing the file from the second row that holds the names of the columns and skip the first row. And also can I get the name of the column using ResultSet something like:
if columnName.equals("Number")
Because I may have a csv file that could have more columns:
"CHAM-24","COMPANY NAME","Test","12",20031213,16,76
Number,Environ,Envel,Date,Time,Total,Count
"1","2","3","4","5",3,9
"6","7","8","9",9",,2
So I want to get the column name and then based on that column I do some other processing.
Once I read the value of each row I want to save the data to an Oracle Table. How do I connect to Oracle from my Application. As the database is on the server. Any help is really appreciated. ThanksThe only thing I could think of (and this is a cluj) would be to attempt to parse the first element of each row as a number. If it fails, you do not have a column name row. You are counting on the fact that you will never have a column name that is a number in the first position.
However, I agree that not always placing the headers in the same location is asking for trouble. If you have control over the file, format it how you want. If someone else has control over the file, find out why they are doing it that way. Maybe there is a "magic" number in the first row telling you where to jump.
Also, I would not use ODBC to simply parse a CSV file. If the file is formatted identically to Microsoft's format (headers in first row, all subsequent rows have same number of columns), then it's fine to take a shortcut and not write your own parser. But if the file is not adhering to that format, don't both using the M$ ODBC driver.
- Saish
"My karma ran over your dogma." - Anon -
Get the column names of a query (in own plugin)
Hi,
I'm developing my first plugin. It is a region plugin where the plugin-user passes a sql query as the source that the plugin will turn into a formated report.
I found how to retreive the query result by using APEX_PLUGIN_UTIL.GET_DATA functions. Since it is an array, it is simple to cycle through the data rows. But how can i figure out
1) how many columns the query returns
2) whats the name of the columns is?
Thanks a lot in advance for any hint...
Cheers, HansHi Hans,
the package APEX_PLUGIN_UTIL provides everything you need. No need to do your own DBMS_SQL handling!
Have a look at the API documentation and the example of GET_DATA at http://docs.oracle.com/cd/E23903_01/doc/doc.41/e21676/apex_plugin_util.htm#BABFBIJD
The t_column_value_list record type is a two dimensional array defined as
type t_column_value_list is table of wwv_flow_global.vc_arr2 index by pls_integer;The first array contains an entry for each column.
l_column_value_list.COUNTcan be used to get the number of columns.
l_column_value_list(1).COUNTcan be used to get the number of rows. An example to iterate over all columns and rows:
for l_column in 1 .. l_column_value_list.count loop
for l_row in 1 .. l_column_value_list(l_column).count loop
sys.htp.p('column#=' || l_column || ' row=' || l_row || ' value: ' || l_column_value_list(l_column)(l_row));
end loop;
end loop;If you need the name of the columns and maybe the original data type and not everything converted to VARCHAR2 you have to use the more sophisticated GET_DATA2. See http://docs.oracle.com/cd/E23903_01/doc/doc.41/e21676/apex_plugin_util.htm#BABFJHAI
This function returns the record type t_column_value_list2 which is defined as
type t_value is record (
varchar2_value varchar2(32767),
number_value number,
date_value date,
timestamp_value timestamp,
timestamp_tz_value timestamp with time zone,
timestamp_ltz_value timestamp with local time zone,
interval_y2m_value interval year to month,
interval_d2s_value interval day to second,
blob_value blob,
bfile_value bfile,
clob_value clob );
type t_value_list is table of t_value index by pls_integer;
type t_column_values is record (
name varchar2(32767),
data_type varchar2(20), /* use c_data_type_* constants to compare */
value_list t_value_list );
type t_column_value_list2 is table of t_column_values index by pls_integer;Again, it's some kind of two dimensional array. The first dimensions are the columns. But this time you also get some details of the parsed column. For example:
for l_column in 1 .. l_column_value_list2.COUNT loop
sys.htp.p('Column Name: ' || l_column_value_list2(l_column).name || ' Data Type: ' || l_column_value_list2(l_column).data_type );
end loop;Will return you all the columns of the SQL statement. Using "name" and "data_type" you can get the column name and the data type. To access the values you can use
for l_column in 1 .. l_column_value_list2.COUNT loop
sys.htp.p('Column Name: ' || l_column_value_list2(l_column).name || ' Data Type: ' || l_column_value_list2(l_column).data_type );
for l_rows in 1 .. l_column_value_list2(l_column).value_list.COUNT loop
sys.htp.p(
'row=' || l_row || ' value: ' ||
apex_plugin_util.get_value_as_varchar2 (
p_data_type => l_column_value_list2(l_column).data_type,
p_value => l_column_value_list2(l_column).value_list(l_row) );
end loop;
end loop;I used apex_plugin_util.get_value_as_varchar2 to always get a VARCHAR2, independent of the actual data type of the column. If you need the original data type, use "number_value", ... of the t_value record type.
Hope that gives you a direction
Patrick
Regards
Patrick
My Blog: http://www.inside-oracle-apex.com
APEX Plug-Ins: http://apex.oracle.com/plugins
Twitter: http://www.twitter.com/patrickwolf -
Help to get the column names from ResultSet.
Hi,
I hava a ResultSet and i want the column names into a String Array.
i wrote the code to get the column names as below,
String s = "select Dept_No,Dept_Name from tb_dept";
rs = statement.executeQuery(s); // ResultSet defined before
String[] columnNames1 = null;
ResultSetMetaData meta = rs.getMetaData ( ) ;
for (int x = 1; x <= meta.getColumnCount(); x++)
columnNames1[x] = meta.getColumnName(x).toString();
but i'm getting NullPointer exception. However if i print the column names means its printing the first column name and giving NullPointer Exception at the next step.
Can anyone help me...
Thanks,
Rashmybut rs.getRow() ll give the current roe no right?
but we can move to the last row using last() method
and get the row count right?
thank you yaar.
private int getRowCount(ResultSet resultSet){
int total = 0;
try{
resultSet.afterLast();
if(resultSet.previous()) total = resultSet.getRow();
resultSet.beforeFirst();
}catch(SQLException sqle){
javax.swing.JOptionPane.showMessageDialog(null,sqle);
return total;
} -
Need help on getting the column names of Tabletype
I have a table Mapping with the following values: This Mapping table contains the table names (in Tabname) and the column names(colname) of various tables and values(ValuesTobeFilled) for the columns.
I have to insert into the tables present in the Tabname field with the values present in the ValuesTobeFilled in the columns present in the Colname field.
Note: The Mapping table need not contain all the columns of the base table. The columns that are not present can be filled with null. And this mapping table is not fixed i.e. rows can be inserted/deleted frequently.
Sample values in mapping table:
Tabname Colname ValuesTobeFilled
sample_items Eno Corresponding Expression to get the values from XML input
sample_items Ename Corresponding Expression to get the values from XML input
XXX YYY Corresponding Expression to get the values from XML input
Before filling in the actual tables, I have to store the entire data temporarily and I have used a tabletype declared as follows:
TYPE T_sample_items IS TABLE OF sample_items%ROWTYPE INDEX BY BINARY_INTEGER;
l_sample_items T_sample_items;
Where the table sample_items have the following columns:
• Eno
• Ename
• Eaddress
• Eemail
So, the tabletype should be filled as:
Eno Ename Eaddress EEmail
1 XXX - -
I have declared a cursor to select the values from mapping table and I need to fill in the ValuesTobeFilled values to the corresponding table.
CURSOR c_xpath (c_tname mapping.TABNAME%type)
IS
select * from mapping where tabname = c_tname;
CURSOR c_tables
IS
SELECT DISTINCT TABNAME FROM mapping;
FOR crsr IN c_tables
LOOP
p_tname := CRSR.TABNAME;
FOR csr IN c_xpath(p_tname)
LOOP
IF l_xml_doc.EXISTSNODE(CSR.XPATH_EXP) = 1
THEN
l_node_value := l_xml_doc.extract(CSR.XPATH_EXP).getStringVal(); -- This is the value to be stored in the corresponding column
ELSE
l_node_value := NULL;
END IF;
IF CSR.COLUMN_NAME = ‘eno’
THEN
l_sample_items(1).eno := l_node_value;
ELSIF CSR.COLUMN_NAME = ‘ename’
THEN
l_sample_items(1).name := l_node_value;
END IF;
END LOOP;
END LOOP;
And I need to eliminate hard coding while comparing the column names (in the following piece of code) as the Mapping table values are subject to insertion/deletion:
IF CSR.COLUMN_NAME = ‘eno’
THEN
l_sample_items(1).eno := l_node_value;
ELSIF CSR.COLUMN_NAME = ‘ename’
THEN
l_sample_items(1).ename := l_node_value;
END IF;
I need to insert the values directly into the tabletype without this hardcoding. Please suggest me ways to compare the mapping table values with the field (column) names of the tabletype. If it is not possible using tabletype, please suggest any other ways of fixing the problem.
Many thanks,
GopiI take it this isn't going to be a serious production system at the end of the day?
Storing metadata in tables for extraction and insertion of data is just wrong in so many ways. It smells heavily of Entity Attribute Value modelling, which is the most wrong way to use a relational database and is known to have major performance implications and be liable to bugs and issues. The idea that EAV modelling allows for 'generic' databases where new data items can be added flexibly later on without having to change code is usually justified with an excuse of "it means we don't have to update all our tables when we want a new column" which is easily countered with "if you're adding a single column a good relational design wouldn't require you to add it to more than one table anyway in most cases".
Just what exactly are you trying to do and why? There has to be a better way. -
Hi,
I am using OCCI to interact with DB through code, which means I am writing a vc++ file to interact with Data Base and execute the Stored Procedure which I am calling from the C++ Code. And also displaying the output of the Stored Procedures to the Front End. I am succeeded in this, but now I should be able to display the Column names of the output to Front End. Can any one help me on this.
Example:
Sno | Sname
------- |-------------
1 ABC
2 DEF
I am getting (1,ABC) and (2,DEF) as the output of the Stored Procedure but I need the Column names also to display. How to get them.
Thanks in Advance..:)Look at Re: exporting csv via pl/sql - select statement?
It has an example how to extract the column name from a cursor. You have to check, whether you can use DBMS_SQL.DESCRIBE_COLUMNS
Your procedure might need another out parameter, that returns the column names , e.g. as comma separated list or as varray. -
How can i get the column names in CSV file.
Hi,
After execution of infospoke i can not see the column names in that file.How can i get column of respective infoprovider?
Thanks,
Gananadha LenkaHello Gana,
Actually while exporting the data using Info Spoke, we have the possibility to modify the data that we send. This is possible using transformations.
In your Info Spoke, you have a tab called Transformations.
Here you need to create an implementation and then use BADi to populate data.
Check if you can write a start routine sort of thing here and insert a new record into the internal table by hardcoding with your field headings.
Let me know if you dont know how to create transformations.
Kris... -
Hello,
Can anyone help me out to write a vb.net script.
I need to read the column names from excel and based on that column names I need to create a table in database(I have more than one sheet in excel).
For each sheet columns will be changing and should create a table dynamically for each sheet.
Any help would be appreciated.Refer the below script to read columns in each sheet.
Dim excelfile As String = Dts.Variables("ExcelPath").Value.ToString
Dim connectionstring As String = "Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + excelfile + ";Extended Properties=Excel 8.0"
Dim oledbcon As New OleDb.OleDbConnection(connectionstring)
oledbcon.Open()
Dim dt As DataTable
Dim schemaTable As DataTable
Dim OLEDBCMD As New OleDb.OleDbCommand
Dim oledbdatareader As OleDb.OleDbDataReader
Dim columns As String = ""
dt = oledbcon.GetSchema("Tables")
Dim TABCOMMAND(20) As String
Dim TABCOUNT As Integer = 0
For Each row As DataRow In dt.Rows
TABCOMMAND(TABCOUNT) = "SELECT * FROM [" & row.Item("TABLE_NAME").ToString & "]"
OLEDBCMD.CommandText = TABCOMMAND(TABCOUNT)
OLEDBCMD.Connection = oledbcon
oledbdatareader = OLEDBCMD.ExecuteReader(CommandBehavior.KeyInfo)
schemaTable = oledbdatareader.GetSchemaTable()
For Each myfield As DataRow In schemaTable.Rows
For Each myproperty As DataColumn In schemaTable.Columns
If myproperty.ColumnName = "ColumnName" Then
columns = columns & myfield(myproperty).ToString & ","
MsgBox(myfield(myproperty).ToString)
End If
Next
Next
oledbdatareader.Close()
OLEDBCMD.Dispose()
Next
oledbcon.Close()
Regards, RSingh -
How to get the column name and table name with value
Hi All
I have one difficult requirement
I have some column values and they have given some alias column names but i need to find the correct column name and table name from the database.
For example value is "SRI" and i dont know the table and exact column name so is there any possibilities to find the column name and table name for the given value
Thanks & Regards
Srikkanth.MSearching all the database for a word...
Courtesy of michaels...
michaels> var val varchar2(5)
michaels> exec :val := 'as'
PL/SQL procedure successfully completed.
michaels> select distinct substr (:val, 1, 11) "Searchword",
substr (table_name, 1, 14) "Table",
substr (t.column_value.getstringval (), 1, 50) "Column/Value"
from cols,
table
(xmlsequence
(dbms_xmlgen.getxmltype ('select ' || column_name
|| ' from ' || table_name
|| ' where upper('
|| column_name
|| ') like upper(''%' || :val
|| '%'')'
).extract ('ROWSET/ROW/*')
) t
-- where table_name in ('EMPLOYEES', 'JOB_HISTORY', 'DEPARTMENTS')
order by "Table"or
11g upwards
SQL> select table_name,
column_name,
:search_string search_string,
result
from (select column_name,
table_name,
'ora:view("' || table_name || '")/ROW/' || column_name || '[ora:contains(text(),"%' || :search_string || '%") > 0]' str
from cols
where table_name in ('EMP', 'DEPT')),
xmltable (str columns result varchar2(10) path '.')
TABLE_NAME COLUMN_NAME SEARCH_STRING RESULT
DEPT DNAME es RESEARCH
EMP ENAME es JAMES
EMP JOB es SALESMAN
EMP JOB es SALESMAN
4 rows selected. -
When double clicking on alv ,want to get the column name
Hello there,
I'm displaying the value of internal table in an alv using Reuse_alv_grid_display method ,using fieldcatalog.I want to know the column name when double clicking on a particular line .If the the fieldname is 'MATNR' then i want to check that column name.
If anybody have any idea plz terply me.
Thanking you neonfor that you have to use the USER_COMMAND event.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
I_CALLBACK_PROGRAM = sy-repid
I_CALLBACK_USER_COMMAND = 'USER_COMMAND'
IT_FIELDCAT = it_fcat
TABLES
t_outtab = itab
EXCEPTIONS
PROGRAM_ERROR = 1
OTHERS = 2
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
FORM USER_COMMAND using ucomm type sy-ucomm
selfield type slis_selfield.
data: fieldname(30).
case ucomm.
when '&IC1'.
case selfield-fieldname.
when 'MATNR'.
message 'clicked on Matnr' type 'I'.
when 'POSNR'.
endcase.
endcase.
ENDFORM. -
Just new to this and unable to find answers
My solution
Public Function GetTableColumnNames() As Boolean
Form1.ListBox1.Items.Clear()
_MDFFileName = String.Format("{0}.mdf", _DatabaseName)
_sqlConnectionString = String.Format("Data Source=(LocalDB)\v11.0;AttachDBFileName={1};Initial Catalog={0};Integrated Security=True;", _DatabaseName, Path.Combine(_DatabaseDirectory, _MDFFileName))
Dim cn As New SqlConnection(_sqlConnectionString)
'put the table name in brackets in case it has spaces in it
Dim SQLString As String = "SELECT * FROM [" & _TableName & "]"
Try
cn.Open()
Dim cmd As New SqlCommand(SQLString, cn)
Dim rdr As SqlDataReader =
cmd.ExecuteReader(CommandBehavior.KeyInfo)
Dim tbl As DataTable = rdr.GetSchemaTable
'This shows all of the information you can access about each column.
For Each col As DataColumn In tbl.Columns
Form1.ListBox1.Items.Add(col.ColumnName)
Debug.Print("col name = " & col.ColumnName & ", type = " & col.DataType.ToString)
Next
'Get each column.
For Each row As DataRow In tbl.Rows
Form1.ListBox1.Items.Add(row("ColumnName"))
Next
rdr.Close()
Catch
MessageBox.Show("Error opening the connection to the database.")
Finally
cn.Close()
End Try
Return _Success
End Function -
To get the column names of a table. How?
I want to use the JDBC API to get the names of all columns of a table.
But I didn't find any method for my purpose. Can you tell me how to do it? ThanksDatabaseMetaData meta = connection.getMetaData();
ResultSet rs = meta.getColumns(null, null, 'TABLENAME', '%')
while (rx.next())
System.out.println(rs.getString(4);
}For details see
http://java.sun.com/j2se/1.4.2/docs/api/java/sql/DatabaseMetaData.html#getColumns(java.lang.String,%20java.lang.String,%20java.lang.String,%20java.lang.String) -
Hi ,
I have a table so many constraints on so many columns. I need to know which column has which constraint plsql dev?? like below...
table_name -------- col_name ------ constraint_name_of_that_col
xxxxxx xxxxxxx xxxxxxxxxxxxxxxx
or else please let me know how can i get the corresponding col_name for a particular constraint name???My be this can give you a help:
[code]
SELECT *
FROM ALL_CONSTRAINTS
WHERE R_CONSTRAINT_NAME IN (SELECT CONSTRAINT_NAME
FROM ALL_CONSTRAINTS
WHERE TABLE_NAME = 'TABLE_NAME'
[/code] -
How to get the column name and table name from xml file
I have one XML file, I generated xsd file from that xml file but the problem is i dont know table name and column name. So my question is how can I retrieve the data from that xml file?
Here's an example using binary XML storage (instead of Object-Relational storage as described in the article).
begin
dbms_xmlschema.registerSchema(
schemaURL => 'my_schema.xsd'
, schemaDoc => xmltype(bfilename('TEST_DIR','my_schema.xsd'), nls_charset_id('AL32UTF8'))
, local => true
, genTypes => false
, genTables => true
, enableHierarchy => dbms_xmlschema.ENABLE_HIERARCHY_CONTENTS
, options => dbms_xmlschema.REGISTER_BINARYXML
end;
genTables => true : means that a default schema-based XMLType table will be created during registration.
enableHierarchy => dbms_xmlschema.ENABLE_HIERARCHY_CONTENTS : indicates that a repository resource conforming to the schema will be automatically stored in the default table.
If the schema is not annotated, the name of the default table is system-generated but derived from the root element name :
SQL> select table_name
2 from user_xml_tables
3 where xmlschema = 'my_schema.xsd'
4 and element_name = 'employee';
TABLE_NAME
employee1121_TAB
(warning : the name is case-sensitive)
To annotate the schema and control the naming, modify the content to :
<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xdb="http://xmlns.oracle.com/xdb">
<xs:element name="employee" xdb:defaultTable="EMPLOYEE_XML">
<xs:complexType>
Next step : create a resource, or just directly insert an XML document into the table.
Example of creating a resource :
declare
res boolean;
doc xmltype := xmltype(
'<employee>
<details>
<emp_id>1</emp_id>
<emp_name>SMITH</emp_name>
<emp_age>40</emp_age>
<emp_dept>10</emp_dept>
</details>
</employee>'
begin
res := dbms_xdb.CreateResource(
abspath => '/public/test.xml'
, data => doc
, schemaurl => 'my_schema.xsd'
, elem => 'employee'
end;
The resource has to be schema-based so that the default storage mechanism is triggered.
It could also be achieved if the document possesses an xsi:noNamespaceSchemaLocation attribute :
SQL> declare
2
3 res boolean;
4 doc xmltype := xmltype(
5 '<employee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6 xsi:noNamespaceSchemaLocation="my_schema.xsd">
7 <details>
8 <emp_id>1</emp_id>
9 <emp_name>SMITH</emp_name>
10 <emp_age>40</emp_age>
11 <emp_dept>10</emp_dept>
12 </details>
13 </employee>'
14 );
15
16 begin
17 res := dbms_xdb.CreateResource(
18 abspath => '/public/test.xml'
19 , data => doc
20 );
21 end;
22 /
PL/SQL procedure successfully completed
SQL> set long 5000
SQL> select * from "employee1121_TAB";
SYS_NC_ROWINFO$
<employee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceS
<details>
<emp_id>1</emp_id>
<emp_name>SMITH</emp_name>
<emp_age>40</emp_age>
<emp_dept>10</emp_dept>
</details>
</employee>
Then use XMLTABLE to shred the XML into relational format :
SQL> select x.*
2 from "employee1121_TAB" t
3 , xmltable('/employee/details'
4 passing t.object_value
5 columns emp_id integer path 'emp_id'
6 , emp_name varchar2(30) path 'emp_name'
7 ) x
8 ;
EMP_ID EMP_NAME
1 SMITH
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