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? Thanks
DatabaseMetaData 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)
Similar Messages
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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 -
How to select even the column names of a table?
Hello All,
Is there a way to select even the column names of a table in the select statement?
My select from a table (say X) is in a SQL* Plus script that gets invoked by application tier and displays data in the application tier window. User's can then copy the data into a spreadsheet and do their processing. However, I need to give them the column names too along with the data.
Thanks,
ChiruIf there is a middle tier that is selecting and
displaying the data, and that's what the users are
copying from, the middle tier would have to address
its presentation of the data to allow users to
include column names. If this is a common task, the
application should probably be modified to give users
the option of downloading the data in a spreadsheet
directly rather than forcing them to copy and paste
data.Thanks for the reply.
The users don't have to copy paste. The application tier has an options in the "Tools" menu item which allows them to copy the entire output to a file (in my case a txt file which is a pipe delimited). Then they have to do text to columns to get the data into each column of the spreadsheet. I could have directly called the stored procedures from the application tier and created ".csv" files and FTP'd them to the user's folders. However, I am having to go this round about because, I am not getting enough support from the LAN team in FTP'ing etc.
OK I'll think of another workaround.
Thanks,
Chiru -
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... -
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 -
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 -
How to read the column name of a table from sap system using C#?
Hi!!
I am using SAP .NET connector and creating a windows application.
Now I wanna read the column name when a table name is given....
Connection is done, but I don't know the code to read the column names alone...
Can anyone help me with the code??fine!!
So if i give the table name, which the RFC_READ_TABLE function module have, will it run properly? or i wanna change all the codes in order to support RFC_READ_TABLE function module?
Because from the beginning I was using BAPI_CUSTOMER_GETLIST function, but my client requirement is to use ERP function module RFC_READ_TABLE, he didn't give any table name also..
This is my code: What I have to change in this???
ECCDestinationConfig ECCDestination = new ECCDestinationConfig();
RfcDestinationManager.RegisterDestinationConfiguration(ECCDestination);
RfcDestination rfcDest = null;
rfcDest = RfcDestinationManager.GetDestination(a);
RfcRepository repo = rfcDest.Repository;
IRfcFunction customerList = repo.CreateFunction("BAPI_CUSTOMER_GETLIST");
IRfcTable addressData = customerList.GetTable("AddressTable"));
int j = addressData.Metadata.LineType.FieldCount;
for (int i = 0; i < j; i++)
RfcElementMetadata metadata = addressData.GetElementMetadata(i);
listallcolumn.Items.Add(metadata.Name);
Message was edited by: Jeswin Rebil -
Set the column name of a table in a list box
is there any code to set the column name of a table in a list box at oracle devloper 6i?
pls help.I dont want to go for pl/sql . It should work any table.You want Dynamic SQL without using PL/SQL? Tricky. I'm sure there's a possible way using some very complex and convoluted XML functionality of SQL but in reality you are asking for something that isn't natural to SQL queries, especially if you are expecting a dynamic number of columns to be produced for each row of data. SQL expects a table structure, including output formats, to be a defined number of columns with any number of rows, not a defined number of rows with any number of columns.
Perhaps if you explain why you need this sort of functionality then we may be able to offer a better solution.
;) -
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;
} -
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. -
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. -
How to get only column names from different tables as single table columns
Hi All,
I have one requirement in which we want only column names from different tables.
for example :
I have three tables T1 ,T2, T3 having
col1 clo2 clo3 --> T1 ,
col3 col5 ,clo6 --> T2 ,
Clo6 col8 col9 --> T3
columns i want to get only all Column names from all table as single Resultset not any data from that how can i get that empty resultset
because this empty result i want to bind in datagridview(front end) as Empty resultset
Please tell me anyways to do this
Niraj SevalkarIf I understand you want an empty result set, just with metadata. SET FMTONLY do the trick:
SET FMTONLY ON
SELECT Col1, Col2, Col3, ....., Coln
FROM
T1 CROSS JOIN T2 CROSS JOIN T3
SET FMTONLY OFF
Another alternative is to include an imposible contition
SELECT Col1, Col2, Col3, ....., Coln
FROM
T1 CROSS JOIN T2 CROSS JOIN T3
WHERE 1 = 0
If you are using a SqlDataAdapter in your client application. You can use the FillSchema method. the select command may be any select statement that returns the columns you want. Under the covers FillSchema will call SET FMTONLY ON.
If you are using SqlCommand.ExecuteReader you can pass SchemaOnly to CommandBehavior argument. SET FMTONLY ON is called under the covers. Again the select command may be any select statement that returns the columns you want.
"No darás tropezón ni desatino que no te haga adelantar camino" Bernardo Balbuena -
How can I list all the column names of a table by programming?
Hi,
Now I want to write an function which has the following features:
Firstly, The function was given a parameter as table name.
Then, it will lists all the columns names of the table.
e.g
table: person
---firstName------lastName----+
Michale Jackson
We can get the columns 'firstname' and 'lastName' by calling the function with table name 'person'.
And I also wonder that where I can get reference book or any other materials?
Thanks.
Edited by: wenjing wang on Feb 15, 2008 6:42 AM
Edited by: wenjing wang on Feb 15, 2008 6:57 AMhi,
hope the below code helps u. Just take the headee which contains the field name and split it like below and compare it with the field name u want here 'last name'.
here,
'First name' will be in wt_filedata1 and remaining field names in wt_filedata2, so 'do' continues.
c_tab must be the separator, either , or + or tab etc..
CODE:
read table person into wl_header index 1.
do.
split wl_header at c_tab into: wt_filedata1 wt_filedata2.
if wt_filedata1 <> 'lastname'.
cnt1 = cnt1 + 1.
wl_header = wt_filedata2.
else.
exit.
endif.
enddo.
Please reward if it is useful.
regards,
sri -
How to display the column names of a table in the output
Hi,
I want to display the name of the columns of the table without using literals in a abap report.
EX: Consider the table KNA1
KUNNR NAME ADDRESS
I want to display the column names in the above fashion without using hardcoded write statements.
Thanking in anticipationYou can use this FM <b>DDIF_FIELDINFO_GET</b> It gives you all the names related to fields in a table -:)
Greetings,
Blag.
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