Delete BLOB image without deleting associated row?

We have some BLOB data stored out of line. The rows associated with it have been set to NULL, but the image files remain and are filling the tablespace. Is there any way of getting rid of the images without deleting their associated rows?
We have also tried DBMS_LOB.ERASE without success.
Thanks.

Hi Liz,
You can't delete a cell, but you can move the cells below it up. Select all cells below that cell in that column. Either drag the selected cells up, or Edit > Cut then Paste onto the cell you want to remove. What this does is move the cells' contents.
To "remove" A2,
There is now a blank cell at the bottom. This has also moved the cell borders.
Regards,
Ian.

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Hi Everyone,
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Amar,
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Add / Delete a row in a table without using a button

Hi,
I was just wondering if it was possible to remove or add a row in a table without using the button? I noticed that in all examples, it always involve putting code in the button click event but I wanted to add or delete a row in a table based on the fact if the row contains a certain value or not. Is that possible?
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Vincent,
Here is the updated file..
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Thanks
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How to Delete duplicates rows without using rowid/distinct.

How to delete duplicates rows present in a table without using rowid or even distinct.

How about:
SQL> SELECT * FROM t1;
         A          B
         1          2
         2          3
         1          2
         4          4
         4          4
         4          4
SQL> DELETE FROM t1
2 WHERE (a, b) IN (SELECT a, b FROM t1
3                   GROUP BY a, b
4                   HAVING COUNT(*) > 1) and
5        rownum = 1;
1 row deleted.
SQL> /
1 row deleted.
SQL> /
1 row deleted.
SQL> /
0 rows deleted.
SQL> SELECT * FROM t1;
         A          B
         2          3
         1          2
         4          4Although, if I was asked a similar question with all those restrictions, my first response would be along the lines of: Is this question indicative of the way I will have to work if I join this company? If so, there is no point answering because I wouldn't touch this job with a ten foot pole.

Deleting a row from a table containing CLOB as one of the columns

When i delete a row from a table which contains a CLOB (internal clob) i.e. CLOB or BLOB column, Will the CLOB data will also be deleted ? I understand that what exactly stored in the CLOB column is the clob locator which points to the actual data.
So, when I delete this row, the clob locator will be deleted, but will the actual data what this locator is pointing to is also deleted ??? if not what is the process to delete the data the locator is pointing to when the row containing the locator is deleted ? If this is not happening then the actual data might become an orphan data which nobody has access to, will automatic garbage cleaning occurs on a frequent intravels to delete unaddressed data residing on the database server ?
Thanks in advance for the help, can email me at [email protected] alternatively.
Regards,
Srinivasa C.

Michael,
Thanks very much for your inputs, here are the results i got when i tried the way you explained in your answer, the TRUNCATE command made the actual size back to normal, but the delete is not the same, so, how can i delete the data that a particular clob locator may point to ?
truncate would delete all the rows of the table, which might not serve my purpose, i would like to delete a row and also it's associated clob data from the database! is there anyway to do this ?
is there any limitation on the ool_sample size? i am basically a c++ programmer, i am looking for some function like FREE which would free the allocated memory to the clob once the locator is deleted.
your help is greatly appreciated - Thanks!
:-) Srini.
==========================
My Results:
==========================
SQL> create table sample (
2 id integer primary key,
3 the_data CLOB default empty_clob() )
4 lob (the_data) store as ool_sample;
Table created.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
20K
SAMPLE
10K
SQL> select count(*) from sample;
COUNT(*)
0
SQL> begin
2 for i in 1..1000
3 loop
4 insert into sample values (i, RPAD('some data', 4000) );
5 end loop;
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> delete sample;
1000 rows deleted.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> commit;
Commit complete.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> begin
2 for i in 1..1000
3 loop
4 insert into sample values (i, rpad('some data', 4000));
5 end loop;
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
9616K
SAMPLE
70K
SQL> truncate table sample;
Table truncated.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
20K
SAMPLE
10K

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I have a table with a long raw column. I am using the following
to try to delete the row from a copy of 8i Lite:
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My application hangs at this point. Any theories?
I am using this driver: oracle.lite.poljdbc.POLJDBCDriver
I am using the 1.2.2 jdk.
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null

I opened activity monitor, closed all programs associated with pdf, preview, etc., however that didn't work. A simple restart did the trick. Even though I could see the pdfs on my destop the files were deleted. That explains why I couldn't manipulate the file. Somehow the file got caught in the graphics string.......????

Error while deleting a row from the Entity Object

Hi OAF Guys,
i am unable to delete the newly created row from the entity object.
let me explain my scenario.
1. i have a table of which some of the columns are mandatory.
2. I am writing the code in the validateEntity to check wether the user really enter anything into the fields.
3. My problem is, when the user creates row and wanted to delete the row without entering any details, the validate entity of the EO gets fired which will not allows to delete the row.
Is there any workaround for this problem.
Regards,
Nagesh Manda.

Hi Tapash,
I am very sorry for not providing you the complete details of my scenario. Here i am explaining
1. what code you have placed while creating the row and in validation method on EOImpl.
while creating a new row i am initializing the primary key of the EO with the sequence value.
2.When you say, you are unable to delete the row, are you getting a error message ? if yes, custom message or fwk error ?
its not the fwk error, its the custom message which wrote in my validateEntity method of EO to check whether the user had entered all the necesary columns or not.
3.How are you trying to delete the row ?
while the user clicks on the delete switcher i am getting the primary key of the row and searching for the row in the vo and finally deleting it.
The problem arises when the user creates a row, and later doesnt want to enter the details and delete it. Here while deleting the row the validateEntity method of the EO gets fired and doesnt allow me to do so :(.
Any way appreciate your help tapash.
Regards,
Nagesh Manda.

How to delete a row in the table in servlets

I have met a problem in deleting a row in table using servlets.
My table looks like this:
ID Name Type
12 Milienium S
15 USIA O
My code looks like this:
String query = "SELECT * FROM tb_Funds";
rs = statement.executeQuery(query);
while(rs.next()) {
StdID=rs.getString("FundID");
StdName=rs.getString("Name");
StdType=rs.getString("Type");
out.print("<td><INPUT TYPE=TEXT NAME=
myName VALUE=" + StdID + "></td>");
out.print("<td>" + StdName + "</td>");
out.print("<td>" + StdType + "</td>");
buf.append("<td>" + "<INPUT TYPE=SUBMIT
NAME=Delete VALUE=DELETE>" + "</td></tr>");
There is a delete button in every row. May I know how to delete the row that I want by getting the ID from the table and delete it from the database.

Deleting from a table is simple -> delete from tb_funds where id = <value>. Obviously replace <value> with the appropriate ID or use a bind variable (a ?) and prepared statements.
Are you asking how to pass the id associated with the table row from the browser when the button is pressed?

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I have MyTableModel class:
class MyTableModel extends AbstractTableModel{
         private Object columnNames[];
         private Object[][] data;
         public MyTableModel(Vector colonne, Vector corpoTabella){
              columnNames= new Object[colonne.size()];
              int nRighe=corpoTabella.size()/colonne.size();
              data=new Object[nRighe][colonne.size()];
              //inizializzo l'intestazione della tabella:
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              //inizializzo il corpo della tabella
              for(int i=0, k=0;i<nRighe;i++){
                   for(int j=0;j<colonne.size();j++){
                        data[i][j]=corpoTabella.get(k);
                        k++;
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            return data.length;
        public String getColumnName(int col) {
            return String.valueOf(columnNames[col]);
        public Object getValueAt(int row, int col) {
            return data[row][col];
        public boolean isCellEditable(int row, int col) {
                return false;
    }And I use it to create a JTable:
table=new JTable(new MyTableModel(colonne,corpo));I read on the tutorial to delete a row I have to use the DefaultTableModel in order to activate the removeRow method, but now how could I implementate it to delete rows?

ok now I have:
modelloTab=new MyTableModel(colonne,corpo);
table=new JTable(modelloTab);
class MyTableModel extends DefaultTableModel{
so I can write without errors:modelloTab.removeRow(0)but despite I wrote a lot of rows in the table when I run it I have a java.lang.ArrayIndexOutOfBoundsException ...what can I do?
Edited by: cassio_steel on Aug 25, 2008 1:52 AM
Edited by: cassio_steel on Aug 25, 2008 1:56 AM

Deleting a row from matrix by context menu

Hi all
does anyone know how can i cause right click on mouse button. on a certain row within a matrix to show a context menu with the option to delete the row. and when pressing the menu item handling the event of deleting the row from the matrix?
appreciate the help
Yoav

Hi Yoav,
Simply, 'context menu' have to be handled with 'menu event' object.
It can be done by 'flushToDataSource' method and some tricks.
Basically, method delete the row without any clause of addon code.
But it's only can be done in display side.
If you're using DBDataSource, you have to flush to the datasource.
I mean, you have to update datasource with the data displayed in the matrix.
and then, delete the last row of the datasource.
FlushToDataSource doesn't affect to the number of rows in the datasource.
You have to delete a row with a method of DBDatasource.. I can't remember the name.
If, the matrix uses userdatasource, you don't need to delete a row in datasource.
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Deleting a row from a Parent VO gives NullPointerException

I am using JDev 11.1.1.2.0
Deleting a row from a Parent VO gives NullPointerException raised from oracle.jbo.server.EntityImpl.vetoRemoveWithDetails(EntityImpl.java:8214)
Here is my implementation:
There are two Entity Objects(Named "Parent" and "Child").
Both EO are NOT based on a database table. (These are populated from a method in the AM, the method calls a database API that returns an nested array and this array is used to populate the Parent and Child entities)
All attributes in these entity objects are Non-persistent.
The View Object "ParentEv" is based on "Parent" EO
The View Object "ChildEv" is based on "Child" EO
The View Objects "ParentEv" and "ChildEv" are linked by a view link.
The Entities "Parent" and"Child" are linked by Entity Association ( as "Composition Association" with "Implement Cascade Delete" checked.)
I am programatically deleting and populating the View Objects ParentEv and ChildEv from a method in the AM.
The first time I execute the method in BC Tester, it works fine.
The second time I execute the method it works fine.
But on third execution, it gives the below error which seems to be NullPointerException raised from oracle.jbo.server.EntityImpl.vetoRemoveWithDetails(EntityImpl.java:8214)
I am able to reproduce this in a test case scenario. It always works the first 2 times and fails when the method to delete and populate the VOs is executed a 3rd time.
If we base the "Parent" and "Child" entities on some dummy database views, it works fine, the problem only occurs when the Entities are NOT based on any table.
Can someone advise on what could be causing this issue?
Thanks,
Mitesh.

Here's the method that I use in my test case to populate the VOs.
   * This method populates the VOs ParentEv and ChildEv.
   * These VOs are based on EOs Paren and Child, respectively.
   * Before populating the VOs I am deleting any existing rows.
   * The first two times this method is executed, it works fine.
   * The third time this method executes it gives a nullpointerexception raised from
   * oracle.jbo.server.EntityImpl.vetoRemoveWithDetails(EntityImpl.java:8214)
public void populateMethod(){
    int rowCount = getParentEv().getRowCount();
    for (int i = 0; i < rowCount; i++) {
         Row row = getParentEv().last();
         if(row!=null)
           row.remove();
    rowCount = getChildEv().getRowCount();
    for (int i = 0; i < rowCount; i++) {
     Row row = getChildEv().last();
     if(row!=null)
       row.remove();
    int k = 0;
    for (int i = 1; i < 5; i++) {
      ParentEvRowImpl parentEvRow = (ParentEvRowImpl)getParentEv().createRow();
      parentEvRow.setParentPk("Parent " + i);
      parentEvRow.setParentDesc("Parent Desc " + i);
      getParentEv().insertRow(parentEvRow);
      for (int j = 1; j < 5; j++) {
     k++;
     ChildEvRowImpl childEvRow = (ChildEvRowImpl)getChildEv().createRow();
     childEvRow.setChildPk("Child " + k);
     childEvRow.setChildDesc("Child Desc " + k);
     getChildEv().insertRow(childEvRow);
}==============================================================================
Here is the Parent.xml for the Parent EO:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE Entity SYSTEM "jbo_03_01.dtd">

<Entity
xmlns="http://xmlns.oracle.com/bc4j"
Name="Parent"
Version="11.1.1.55.36"
AliasName="Parent"
BindingStyle="OracleName"
UseGlueCode="false"
RowClass="oracle.jbo.server.EntityImpl"
DefClass="oracle.jbo.server.EntityDefImpl"
CollClass="oracle.jbo.server.EntityCache">
<DesignTime>
    <AttrArray Name="_publishEvents"/>
</DesignTime>
<Attribute
    Name="ParentPk"
    IsQueriable="false"
    IsPersistent="false"
    ColumnName="PARENTPK"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"
    PrimaryKey="true"/>
<Attribute
    Name="ParentDesc"
    IsQueriable="false"
    IsPersistent="false"
    ColumnName="$none$"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"/>
<AccessorAttribute
    Name="Child"
    Association="model.eo.ea.ChildParentAssoc"
    AssociationEnd="model.eo.ea.ChildParentAssoc.Child"
    AssociationOtherEnd="model.eo.ea.ChildParentAssoc.Parent"
    Type="oracle.jbo.RowIterator"
    IsUpdateable="false"/>
</Entity>==============================================================================
Here is the Child.xml for the Child EO:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE Entity SYSTEM "jbo_03_01.dtd">

<Entity
xmlns="http://xmlns.oracle.com/bc4j"
Name="Child"
Version="11.1.1.55.36"
AliasName="Child"
BindingStyle="OracleName"
UseGlueCode="false">
<DesignTime>
    <AttrArray Name="_publishEvents"/>
</DesignTime>
<Attribute
    Name="ChildPk"
    IsUpdateable="while_insert"
    IsQueriable="false"
    IsPersistent="false"
    IsNotNull="true"
    ColumnName="CHILDPK"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"
    PrimaryKey="true"/>
<Attribute
    Name="ChildDesc"
    IsQueriable="false"
    IsPersistent="false"
    ColumnName="$none$"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"/>
<Attribute
    Name="ParentPk"
    IsQueriable="false"
    IsPersistent="false"
    IsNotNull="true"
    ColumnName="$none$"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"/>
</Entity>==============================================================================
Here is the ChildParentAssoc.xml for the Association between Parent and Child EOs:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE Association SYSTEM "jbo_03_01.dtd">

<Association
xmlns="http://xmlns.oracle.com/bc4j"
Name="ChildParentAssoc"
Version="11.1.1.55.36">
<DesignTime>
    <Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<AssociationEnd
    Name="Parent"
    Cardinality="1"
    Source="true"
    Owner="model.eo.Parent"
    DeleteContainee="true"
    LockLevel="NONE"
    ExposedAccessor="false">
    <DesignTime>
      <Attr Name="_aggregation" Value="0"/>
      <Attr Name="_finderName" Value="Parent"/>
      <Attr Name="_isUpdateable" Value="true"/>
      <Attr Name="_minCardinality" Value="1"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.eo.Parent.ParentPk"/>
    </AttrArray>
</AssociationEnd>
<AssociationEnd
    Name="Child"
    Cardinality="-1"
    Owner="model.eo.Child"
    HasOwner="true">
    <DesignTime>
      <Attr Name="_aggregation" Value="0"/>
      <Attr Name="_finderName" Value="Child"/>
      <Attr Name="_isUpdateable" Value="true"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.eo.Child.ParentPk"/>
    </AttrArray>
</AssociationEnd>
</Association>==============================================================================
Here is the ParentEv.xml for the ParentEv VO:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE ViewObject SYSTEM "jbo_03_01.dtd">

<ViewObject
xmlns="http://xmlns.oracle.com/bc4j"
Name="ParentEv"
Version="11.1.1.55.36"
BindingStyle="OracleName"
CustomQuery="true"
RowClass="model.vo.ev.ParentEvRowImpl"
ComponentClass="model.vo.ev.ParentEvImpl"
PageIterMode="Full"
UseGlueCode="false">
<DesignTime>
    <Attr Name="_codeGenFlag2" Value="Access|Coll"/>
    <Attr Name="_isExpertMode" Value="true"/>
    <Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<EntityUsage
    Name="Parent"
    Entity="model.eo.Parent"/>
<ViewAttribute
    Name="ParentDesc"
    IsSelected="false"
    IsQueriable="false"
    IsPersistent="false"
    PrecisionRule="true"
    Precision="255"
    EntityAttrName="ParentDesc"
    EntityUsage="Parent"
    AliasName="PARENTDESC"/>
<ViewAttribute
    Name="ParentPk"
    IsQueriable="false"
    IsPersistent="false"
    PrecisionRule="true"
    EntityAttrName="ParentPk"
    EntityUsage="Parent"/>
<ViewLinkAccessor
    Name="ChildEv"
    ViewLink="model.vo.vl.ChildEvParentEvVl"
    Type="oracle.jbo.RowIterator"
    IsUpdateable="false"/>
</ViewObject>==============================================================================
Here is the ChildEv.xml for the ChildEv VO:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE ViewObject SYSTEM "jbo_03_01.dtd">

<ViewObject
xmlns="http://xmlns.oracle.com/bc4j"
Name="ChildEv"
Version="11.1.1.55.36"
BindingStyle="OracleName"
CustomQuery="true"
RowClass="model.vo.ev.ChildEvRowImpl"
ComponentClass="model.vo.ev.ChildEvImpl"
PageIterMode="Full"
UseGlueCode="false">
<DesignTime>
    <Attr Name="_codeGenFlag2" Value="Access|Coll"/>
    <Attr Name="_isExpertMode" Value="true"/>
    <Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<EntityUsage
    Name="Child"
    Entity="model.eo.Child"/>
<ViewAttribute
    Name="ChildDesc"
    IsSelected="false"
    IsQueriable="false"
    IsPersistent="false"
    PrecisionRule="true"
    Precision="255"
    EntityAttrName="ChildDesc"
    EntityUsage="Child"
    AliasName="CHILDDESC"/>
<ViewAttribute
    Name="ChildPk"
    IsUpdateable="while_insert"
    IsQueriable="false"
    IsPersistent="false"
    IsNotNull="true"
    PrecisionRule="true"
    EntityAttrName="ChildPk"
    EntityUsage="Child"/>
<ViewAttribute
    Name="ParentPk"
    IsQueriable="false"
    IsPersistent="false"
    IsNotNull="true"
    PrecisionRule="true"
    EntityAttrName="ParentPk"
    EntityUsage="Child"/>
</ViewObject>==============================================================================
Here is the ChildEvParentEvVl.xml for the view link between ParentEv and ChildEv VOs:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE ViewLink SYSTEM "jbo_03_01.dtd">

<ViewLink
xmlns="http://xmlns.oracle.com/bc4j"
Name="ChildEvParentEvVl"
Version="11.1.1.55.36">
<DesignTime>
    <Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<ViewLinkDefEnd
    Name="ParentEv"
    Cardinality="1"
    Owner="model.vo.ev.ParentEv"
    Source="true">
    <DesignTime>
      <Attr Name="_finderName" Value="ParentEv"/>
      <Attr Name="_isUpdateable" Value="true"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.vo.ev.ParentEv.ParentPk"/>
    </AttrArray>
</ViewLinkDefEnd>
<ViewLinkDefEnd
    Name="ChildEv"
    Cardinality="-1"
    Owner="model.vo.ev.ChildEv">
    <DesignTime>
      <Attr Name="_finderName" Value="ChildEv"/>
      <Attr Name="_isUpdateable" Value="true"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.vo.ev.ChildEv.ParentPk"/>
    </AttrArray>
</ViewLinkDefEnd>
</ViewLink>

Delete duplicate rows -- based on 4 columns -- how?

I asked this question on how to delete duplicates recently and received this suggestion which works well -- except --
With CTE AS
SELECT *, ROW_NUMBER() OVER (Partition by fld1 order by fld1) RowNum
FROM #tmpA
DELETE From CTE
WHERE RowNum > 1
-- the actual table I need to delete duplicate rows on is based on 4 columns. The following table contains 14,462 rows of which 14,348 are distinct -- based on the following 4 colums. Below is an image of a sample of the data contained in the
table for my question and to the right of that data is the column structures (data types). Is it possible to do something like the above example suggestion with the table in the image below? How to do that? I need to delete rows so that 14462
goes down to 14348. If I only reference one column for the delete -- this would delete like 7000+ rows. I only need to remove 114 rows.
Rich P

Add the other 3 columns to the partition.
Jason Long

Delete BLOB image without deleting associated row?

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