Query for a list of null columns in the table

Similar Questions

• How to find the NULL columns in the table?

  Hello
  
  Please provide the query to search for null columns in the table. Here, all the rows in the table have same column as null. It will not change.
  
  Table
  ---------------
  C1 c2 c3 c4
  X C 10
  T D 20
  
  I want to know that C2 is the nullable column.
  Thanks in advance!
  
  Kind regards
  Florian...

  A variance more

  create or replace function is_nulled_column(tab varchar2, col varchar2) return varchar2 is
  cnt number:=1;
  begin
    execute immediate 'select count(1) from '||tab||' where '||col||' is not null and rownum=1' into cnt;
    return case when cnt=0 then 'Y' else 'N' end;
  end;
  

  and use:

  select
   c.OWNER,c.TABLE_NAME,c.COLUMN_NAME,c.NULLABLE,is_nulled_column(c.TABLE_NAME,c.COLUMN_NAME) all_nulls
  from all_tab_columns c
  where c.OWNER=user
  and c.TABLE_NAME like '%'
  order by c.OWNER,c.TABLE_NAME,c.COLUMN_ID
  

• Query took too much time when adding new column to the table and the index set on this

  I added a new column to the table that contains thousands of records. and created the composite index with three columns (those newly added + two existing column)

  for the specifics. TBL table there are two columns col1, col2

  I added the new column col3 to TBL and created composit index (col1, col2, col3).

  Now for all the records in col3 is NULL. When I choose on this table, it takes too long...

  Any idea what my I do bad., I have check the query plan, it is using the index

  It is solved using collection of statistics using the

  DBMS_STATS. GATHER_TABLE_STATS

  @Top.Gun thanks for your review...

• Can we have hash partition and list on 2 columns in the same table. How.

  Can we have hash partition and list on 2 columns in the same table. How.
  
  Work on 10g release 2

  # List-Hash is a valid composite partitioning strategy 11 from g.

• You can add not null column to a table that already contains data?

  Hello
  You can add not null column to a table that already contains data?
  Database 9i / 10g on RHEL
  Concerning

  Who worked in 9i?

  Looks like that it:

  SQL> select * from v$version where rownum = 1
  /
  BANNER
  ----------------------------------------------------------------
  Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
  1 row selected.
  
  SQL> create table emp2 as select * from emp
  /
  Table created.
  
  SQL> alter table emp2 add new_col integer default 0 not null
  /
  Table altered.
  

• Get columns from the table shown in the iterator

  Hello...

  I have the table in a collection of standard panel.  So, I can show/hide certain columns in the table using the columns in the view menu.

  Then I'm trying to do is export to excel (using apache poi) by looping through the table iterator.  What I can't do is search if the column is not displayed.  I don't want all the columns that are exported without worrying.  How can I achieve this?

  My bean is similar to the following for loop through the iterator:

  BindingContext bindingContext = BindingContext.getCurrent ();

  BindingContainer bindingContainer = bindingContext.getCurrentBindingsEntry ();

  DCIteratorBinding dcIteratorBinding = (DCIteratorBinding) bindingContainer.get ("EmployeesIterator");

  lines [] oracle.jbo.Row = dcIteratorBinding.getAllRowsInRange ();

  for (oracle.jbo.Row line: lines) {}

  {for (String colName: {row.getAttributeNames ())}

  output to excel cell here using row.getAttribute (colName) m:System.NET.SocketAddress.ToString)

  }

  }

  Thank you.

  Hello

  It's like ask the engine in your car to what colors the seats have. The iterator doesn't know anything about the visible state of a column. If the displayed columns must be determined from the table instance (richeTableau)

  The following article solves exactly the requirement that you have: Oracle ADF: Build Your Own it comes with a sample that you can download here: http://www.oracle.com/technetwork/issue-archive/2013/13-jul/o43adf-1940728.zip

  Have a look at CustomPanelCollectionBean.java:

  The method and code that you want to look for is:

  private String getRowHtml (row rw) {}

  StringBuffer rowHtmlBuf = new StringBuffer();

  Read visible columns in the table of the table instance. This way the

  PanelCollection can be used to show/hide columns and exclude

  printing to HTML

  Table richeTableau = this.getRichTable ();

  the list of columns determine the print attributes

  The list of columns in = table.getChildren ();

  int attrCount = columns.size ();

  rowHtmlBuf.append (this.addRowStart ());

  for (int i = 0; i)< attrcount;="" i++)="">

  for all visible columns, add columns to print

  If (((RichColumn) columns.get (i)) .isVisible ()) {}

  If (rw.getAttribute (i) instanceof ViewRowSetImpl) {}

  ignore the collections of detail used for master/detail example

  constraints in British Colombia ADF

  } ElseIf (rw.getAttribute (i) instanceof oracle.jbo.domain.Timestamp) {}

  shorten date to exclude the infromation times

  SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");

  String dateFormatString = sdf.format (((Timestamp) rw.getAttribute (i)) .getData ());

  rowHtmlBuf.append (this.addDataCell (dateFormatString));

  } else {}

  Prnt attribute values and if sure that null values don't raise a NPE. Add a white character to NULL

  attribute values

  rowHtmlBuf.append (this.addDataCell (rw.getAttribute (i)! = null? rw.getAttribute (i) m:System.NET.SocketAddress.ToString ():))

  " "));

  }

  }

  }

  rowHtmlBuf.append (this.addRowEnd ());

  Return rowHtmlBuf.toString ();

  }

  You need to access the Rich Table instance (for example using the JSF component binding) to then compare the attribute in the iterator with the visibility of the column

  Frank

• Dynamic number of columns in the table

  Hello
  
  I use JDev 10.1.3.3.0 with ADF. I just want to create a table, with a dynamic number of columns in the table. The background is that a user of my webapplication can create and submit a sql query. Now, I have to show him the results. My idea was, I have save the result in a bean managed (ResultTable), which is stored in the session context and map at my table in my page.
  
  If I search the Forum and don't get only one useful thread: {: identifier of the thread = 971888}, but I don't exactly understand. What is the CollectionModel? Do I need this?
  
  I'm trying to report on the following:
  
  ResultTable

  public class ResultTable {
  
      public static final String SESSION_NAME = "ResultTable";
      private ArrayList<ResultColumn> columnList; 
      private CollectionModel collectionModel;
  
      public ResultTable() {
      }
  
      public ArrayList<ResultColumn> getColumnList() {
          return columnList;
      }
  
      public void setColumnList(ArrayList<ResultColumn> columnList) {
          this.columnList = columnList;
      }
  }

  ResultColumn

  public class ResultColumn {
      
      private ArrayList<ResultRow> rowList;
      private String name;
  
      public ResultColumn() {
      }
  
      public ArrayList<ResultRow> getRowList() {
          return rowList;
      }
  
      public void setRowList(ArrayList<ResultRow> rowList) {
          this.rowList = rowList;
      }
  
      public String getName() {
          return name;
      }
  
      public void setName(String name) {
          this.name = name;
      }
  }

  ResultTable

  public class ResultRow {
      
      private String value;
  
      public ResultRow() {
      }
  
      public String getValue() {
          return value;
      }
  
      public void setValue(String value) {
          this.value = value;
      }
  }

  My showResult.jspx

  <af:table emptyText="No items were found"
            value="ResultTable.columnList"
            var="column"
            varStatus="colStatus"
            id="table1">
    <af:forEach items="#{column.rowList}" var="row" varStatus="rowStatus">
      <af:column sortable="false" headerText="#{column.name}" 
                 id="column#{colStatus.index}">
        <af:outputText value="#{row.value}"
                       id="outputText#{rowStatus.index}"/>
      </af:column>
    </af:forEach>
  </af:table>

  The ResultTable was filled with data, but the Board is not filled. So, I think, it must be rejected to the data binding.
  
  I get warnings and errors to run too. But I don't know if they are the result or cause of my problem.

  27.10.2009 10:15:41 oracle.adfinternal.view.faces.renderkit.core.xhtml.TableRenderer renderTableWithoutColumns
  WARNUNG: Table with id: form1:table1 has no visible columns!
  27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
  SCHWERWIEGEND: Element End name:span does not match start name:div
  27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
  SCHWERWIEGEND: Element End name:span does not match start name:div
  27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
  SCHWERWIEGEND: Element End name:form does not match start name:span
  27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
  SCHWERWIEGEND: Element End name:body does not match start name:form
  27.10.2009 10:15:41 oracle.adfinternal.view.faces.io.HtmlResponseWriter endElement
  SCHWERWIEGEND: Element End name:html does not match start name:body

  Concerning
  
  Majo

  Hi Mario,.

  Note that your JSPX snippet above has serious shortcomings:
  

• 'ResultTable.rowList' is not an EL expression, but the value attribute of the af: table must refer to an EL expression
  
• Items AF:foreach = "#{row.cellList}"-you don't have to store information about the columns of all rows, more it won't work as af:forEach tag may not see the value of the expression of EL #{line} (or any component EL expression created). " See the tagdoc here: http://www.oracle.com/technology/products/jdev/htdocs/partners/addins/exchange/jsf/doc/tagdoc/core/forEach.html
  
• "ID =" Column #{cellStatus.index} "and id =" outputText #{rowStatus.index} "are invalid and that they don't compile even as id attributes cannot contain EL expressions.

  .

  I think to solve your problem, you need three things:
  

• List of columns (for example the list If you need to store only the names of column or list If you need additional information),.
  
• list of lines,
  
• a line can be a map (with the name of the column - cell data mapping; card e.g.) or a list (with columns indexed; for example

• Regd select the column in the table area

  Hello
  
  I have a search page... Have used autocustomization to create... This page will be used to query data from a table and then we must also update two fields of results table and save.
  
  There is a region of results. I've included the multiselect table option that made me select a column as the first column of the table. Also, including a tableaction and a button upate with whom...
  
  I need to write a handler for the update now... but do not understand all the slect column...
  
  Whenever a user clicks on the boxes to select specific records and change the fields and click Update to save, how to write code to check whether the checkbox option has been activated or not?
  
  
  Please help me as soon as possible...
  
  
  Kind regards
  Preeti

  Hello

  Take a Transient attribute tell 'SelectFlag' in view object and to set the Instance of the view and the view attribute
  for multipleselection in the table.

  Now that the update is click on the button:

  If (PageContext.GetParameter ("Update")! = null)
  {
  OAApplicationModule am = pageContext.getApplicationModule (webBean);
  OAViewObject vo = (OAViewObject) am.findViewObject ("projVO1");
  Line [] row = vo.getAllRowsInRange ();
  Loop through lines
  for (int i = 0; i)<>
  {
  Check if checbox is checked or not
  If (line.getAttribute("SelectFlag").toString().equals("Y"))//means checbox is checked for this line.
  {
  write your logic
  }
  }
  }

  Thank you
  Gerard

• Error when selecting all the columns in the table

  Hi all

  When I write a query by selecting all the columns of the table fromo using * function as well as another new column, I get the error,

  Select *, to_char (hiredate, 'fmday') day

  WCP

  where to_char (hiredate, 'fmday') ('Monday');

  ERROR on line 1:

  ORA-00923: THE KEYWORD not found where expected

  I need all the columns in the table with the column user-defined 'day '. Is there a way I can get the result like this?

  Hello

  padders wrote:

  Alias table to use...

  Or the name of the table, for example

  Select emp.*, to_char (hiredate, "fmday") as day

  WCP

  where to_char (hiredate, 'fmday') ('Monday');

  The bottom line is that * must be qualified (with a table name or alias) when the SELECT clause includes anything else besides *.

• Impossible to extract the data of an additional column in the table advance

  Hello

  We have an obligation to add an extra column to the table of advanced search. In addition, we need sort the table using this additional column.

  Now, we have achieved the following:

  1. the required VO was already extended previously and the additional column (LAST_UPDATE_DATE) is already present in the definition of the EO. So, we just added the tag for LAST_UPDATE_DATE in YOUR XML in the form:

  < ViewAttribute

  Name = "LAST_UPDATE_DATE".

  IsPersistent = "false".

  Type = "Oracle.jbo.domain.date"

  ColumnType = "DATE".

  AliasName = 'LAST_UPDATE_DATE. '

  Expression = "LAST_UPDATE_DATE."

  SQLType = 'DATE' >

  < / ViewAttribute >

  2 added a new MessageStyledText column, and updated the following property:

  Prompt = LastUpdateDate. Discover the Instance = TaskPerzSumVO. Display attribute = LAST_UPDATE_DATE. Sort Allowed = true

  The field is now visible in table advance and whenever we seek, attaches the value as ' 1901-01-01'. While I checked manually in the respective table, we have the appropriate data. But in the front end we do not get the data in our additional column of table in advance. In addition, if we try to sort the table by clicking the column LAST_UPDATE_DATE, we get the NPE error. Spec of NullPointerException is as follows:

  # # 0 in detail

  1. java.lang.NullPointerException

  at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:989)

  Kindly help us to obtain the appropriate data in the additional column. Thank you!

  Kind regards

  Zahid

  Hi Zahid,

  This is the error:

  29000: unexpected exception caught: oracle.jbo.NoObjException, msg = Houston-25003: TaskEO.LAST_UPDATE_DATE object of type entity activity not found

  Tag entity by its use should have only name of EO and not the name of the attribute.

  Use instead under the tag:

  EntityUsage = "TaskEO".

  Also, I mentioned that rather tags manually, add it please try Wizard VO to add this attribute in EO attributes available list.

• How to find null values in the table

  Hi experts,
  
  my version is oracledb10g:
  
  I am doubted simple.
  
  for example:
  
  create table ex1 (e varchar2 (20));
  
  Insert ex1 (null).
  
  insert into ex1 (e)
  
  number of will be: 2
  
  I can easily find the value "e".
  
  so my question is:
  
  How can I find null values in the table and I want to remove the null values from the table.

  ADF 7 wrote:
  Hi experts,

  my version is oracledb10g:

  I am doubted simple.

  for example:

  create table ex1 (e varchar2 (20));

  Insert ex1 (null).

  insert into ex1 (e)

  number of will be: 2

  It depends on what you expect. If you issue count (*) you ask Oracle "how many lines there. If you issue a County () you ask Oracle 'how non null values for are there. "

  ADF 7 wrote:

  I can easily find the value "e".

  so my question is:

  How can I find null values in the table and I want to remove the null values from the table.

  delete from 
  where  is null;
  

  Ideally you would simply place a NOT NULL constraint on the column in question, thus prohibiting NULL values into the system (assuming that your business needs, it is that the column MUST always have a value).

• How to check the index, on the number of columns in the table is created

  How to check on the number of columns in the table the index has been created. ??
  
  OR
  
  How check index, on the number of columns in the table that it is been created?

  890306 wrote:
  How to check on the number of columns in the table the index has been created. ??

  >

  OR

  How check index, on the number of columns in the table that it is been created?

  query USER_IND_COLUMNS

  SQL> desc user_ind_columns
   Name                            Null?    Type
   ----------------------------------------- -------- ----------------------------
   INDEX_NAME                             VARCHAR2(30)
   TABLE_NAME                             VARCHAR2(30)
   COLUMN_NAME                             VARCHAR2(4000)
   COLUMN_POSITION                        NUMBER
   COLUMN_LENGTH                             NUMBER
   CHAR_LENGTH                             NUMBER
   DESCEND                             VARCHAR2(4)
  

  Handle: 890306
  Status level: Beginner
  Join date: October 8, 2011
  Messages total: 13
  Total Questions: 5 (5 open)

  Why all the question still pending?

  Published by: sb92075 on December 3, 2011 17:21

• RollbackToSP will be working if the column in the table has been abandoned?

  Hi all
  
  I would really appreciate an opinion on these two scenarios in OWM.
  
  Scenario one
  
  Steps to follow:
  
  
  
  Savepoint1, created may 20
  DIAL THE DBMS_WM. CreateSavepoint ('LIVE', 'RRR_Test');
  
  
  May 21 change us a table with version:
  
  
  DBMS_WM EXEC. BEGINDDL ('users');
  
  
  
  -remove unused column
  
  ALTER table drop column field users_LTS;
  
  
  
  EXEC DBMS_WM.COMMITDDL ('users');
  
  
  
  3 roll back at the point of backup created on 20 may
  DIAL THE DBMS_WM. RollbackToSP ('LIVE ',' RRR_Test);
  
  
  
  
  
  End of the scenario
  
  
  
  Question: Will the OWM correctly changes rollback made to the schema of the table USERS?
  
  
  
  
  
  
  
  
  
  Second scenario
  
  
  
  
  
  1 Savepoint1 created may 20
  DIAL THE DBMS_WM. CreateSavepoint ('LIVE', 'RRR_Test');
  
  
  
  May 21 change us a table with version:
  
  
  DBMS_WM EXEC. BEGINDDL ('users');
  
  
  
  -remove unused column
  
  ALTER table drop column field users_LTS;
  
  
  
  EXEC DBMS_WM.COMMITDDL ('users');
  
  
  
  3 roll back at the point of backup created on 20 may
  (1) add the domain of the column to the schema
  
  (2) rollback
  DIAL THE DBMS_WM. RollbackToSP ('LIVE ',' RRR_Test);
  
  
  
  End of the scenario
  
  
  
  Question: given that the pattern is exactly the same as it was originally, this will work?
  
  
  Your ideas are welcome.
  
  Thank you
  
  Serge
  
  Published by: sbornow on May 27, 2009 11:29

  Hi Serge,

  When you add the column to the table, it will be added to all versions/workspaces for this table. All of the current versions, as well as all the historical lines, will contain this new column with a null value or the default value.

  None of DBMS_WM restore procedures will be affected by the DDL changes, or a restore will return all DDL changes made since the backup was created. A backup point cannot become invalid. The restoration works on the level of the line, based on the columns of the primary key (which is not editable by the DOF). So the resulting table will have the same lines as he did at the time that the backup point has been created, adjusted for any changes in the column that has been done on the non-primary key columns.

  Kind regards
  Ben

• How to remove columns from the table on the master 1-0?

  I have an array of 96 columns with strings. I also have the array of int 96-elemets (mask) with 1 and 0.

  What I want to do is to is to remove (or hide - but I read that it is not possible) all the columns with index corresponding to 0 in the mask table.

  example:

  columns in the table

  1 2 3 4 5

  mask

  0 1 0 0 1

  I want to remove the columns 1, 3 and 4 and leave only 2 and 5 in my table.

  How can I do?

  If I create loop for with i as the index of the column, when I do DeleteTableColumns() columns number decreases, and I get an error of range out of

  Or do I have an option to hide the unnecessary columns (not set their width to 1, it's very ugly-looking)?

  Please help me (())

  Hello rovnyart!

  1. removal of columns in the table:

  I suspect that the reason why you get the out-of-range error is due to fact that in your loop, you delete the columns in the table, you'll eventually end up by referring to a column that no longer exists, because the other columns before it have been deleted. While you remove each column of your table in the loop for example, the column index number will move, because you deleted the other columns in front of her.

  To resolve this, even if you delete a column in your loop, make sure that you take also into account that the index of the column is moved because of the removed columns.

  2 hide columns in table:

  You can use the ATTR_COLUMN_VISIBLE attribute to hide columns in the table:

  http://forums.NI.com/T5/LabWindows-CVI-idea-exchange/add-attr-column-visible-attribute-for-table-Col...

  http://zone.NI.com/reference/en-XX/help/370051Y-01/CVI/uiref/cviattrcolumnvisible_column/

  3 alternatives:

  Note that another alternative would also use a tree instead, control as the tree control also supports the hidable columns:

  http://forums.NI.com/T5/LabWindows-CVI/table-hide-column/TD-p/569773

  Best regards!

  -Johannes

• How to create a status column in the table

  Hello everyone

  I am trying to create a column of the table status in frontview Panel. I enclose a picture with her to say clearly what I say.plz tell me how to create the active status column in the table.

  I want to show green for safety stock and red for safety stock below.