cannot select data in a nested table?

why we cannot select data in a nested table?

DECLARE
    TYPE MY_ARR IS TABLE OF VARCHAR2(15);
    IDArr MY_ARR;
BEGIN  
    IDArr := MY_ARR();
    select ename into IDArr from emp;
END;
/

806540 wrote:
why we cannot select data in a nested table?

DECLARE
TYPE MY_ARR IS TABLE OF VARCHAR2(15);
IDArr MY_ARR;
BEGIN
IDArr := MY_ARR();
select ename into IDArr from emp;
END;
/

It also isn't a such thing as a ' + nested table + "-despite what the documentation calls them. The CORRECT term is the table. Since the dawn of programming. And called 'paintings' in many languages of programming and data structure theory ever since.

In Oracle, the term "table" has a very precise meaning. A table in PL/SQL language nothing BUT a table at all. A completely different data structure that does not have the characteristics of an Oracle table.

The code you wrote is also dangerous. If there are 100,000 rows in this table, you will copy all 100,000 rows in a PL/SQL table - that resides in the memory of the very expensive server called the PGA (process private memory). You can cause a serious impact on the memory of the server with this approach of poor quality - I saw such a code crashing the production servers.

So let's not terminology. Is the wrong approach. Code is wrong.

So why not rather tell us what you're doing, or trying to understand, instead?

Tags: Database

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    So the only purpose of the equivalent concept of SQL types of nested tables is to use one of the data types when you define an actual table?

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    And this nested table could be a record in SQL or object in PLSQL or simple data type (varchar number, etc.)?

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     "REGISTRY_ID" NUMBER(10,0), 
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     "DATE_OF_DIAGNOSIS" DATE, 
     "HISTOLOGY_GROUP" VARCHAR2(2 BYTE), 
     "BEHAVIOR" VARCHAR2(1 BYTE), 
     "GRADE" VARCHAR2(1 BYTE), 
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object(
tumor_id VARCHAR2(1),   
marital_status VARCHAR2(1),   
age NUMBER(3),   
date_of_diagnosis DATE,  
cs_schema VARCHAR2(2),   
histology_group VARCHAR2(2),   
behavior VARCHAR2(1),   
grade VARCHAR2(1),   
first_primary_ind VARCHAR2(1),   
tumor_size NUMBER(4,   1),   
tumor_extension VARCHAR2(2),   
lymph_nodes VARCHAR2(1),   
nodes_positive NUMBER(4),   
surgery VARCHAR2(2),
radiation VARCHAR2(1)
);


create or replace type tumor_table as table of tumor_object;


  CREATE TABLE "DSS2_MINING"."CANCER_PATIENTS" 
   (     "PATIENT_ID" VARCHAR2(10 BYTE) NOT NULL ENABLE, 
     "RACE" VARCHAR2(2 BYTE), 
     "SEX" VARCHAR2(1 BYTE), 
     "NUMBER_OF_PRIMARIES" NUMBER(1,0), 
     "TUMORS" "DSS2_MINING"."TUMOR_TABLE" , 
     "VITAL_STATUS_RECORD" VARCHAR2(1 BYTE), 
     "CAUSE_OF_DEATH" VARCHAR2(5 BYTE), 
     "SURVIVAL_TIME_FINAL" NUMBER, 
     "SURVIVAL_VARIABLE" VARCHAR2(1 BYTE), 
      CONSTRAINT "CANCER_PATIENTS_PK" PRIMARY KEY ("PATIENT_ID")
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    I hope that if anyone can help in this case or I you know any reference on similar cases

    Thank you
    A.L

    Published by: user9003901 on November 26, 2010 02:48

    Something like:

    INSERT
  INTO CANCER_PATIENTS
  SELECT  PATIENT_ID,
          RACE,
          SEX,
          NUMBER_OF_PRIMARIES,
          (
           SELECT  CAST(
                        COLLECT(
                                TUMOR_OBJECT(
                                             TUMOR_ID,
                                             MARITAL_STATUS,
                                             AGE,
                                             DATE_OF_DIAGNOSIS,
                                             CS_SCHEMA,
                                             HISTOLOGY_GROUP,
                                             BEHAVIOR,
                                             GRADE,
                                             FIRST_PRIMARY_IND,
                                             TUMOR_SIZE,
                                             TUMOR_EXTENSION,
                                             LYMPH_NODES,
                                             NODES_POSITIVE,
                                             SURGERY ,
                                             RADIATION
                                            )
                               )
                        AS TUMOR_TABLE
                       )
             FROM  "TUMORS" T
             WHERE T.PATIENT_ID = P.PATIENT_ID
          ),
          VITAL_STATUS_RECORD,
          CAUSE_OF_DEATH,
          SURVIVAL_TIME_FINAL,
          SURVIVAL_VARIABLE
    FROM  PATIENTS P
/

    SY.
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Copyright (c) 2003, 2007, Oracle.  All rights reserved.

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Copyright (c) 1982, 2007, Oracle.  All rights reserved.


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    concerning

    hqt200475

    Hello

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*
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  • How to select a record in one table to manipulate data in a database?

    Hello community,

    Using 32-bit Labview 2015.

    I created a user interface that runs a query and retrieves my table from a sql database.

    I want to be able to manage only one record at a time by selecting the record in my table and then manipulate the data according to the needs.

    Whenever the user runs a query, I want as the first record in the table to be selected / highlighted.

    I want an indicator that is currently active.

    Then a click of a button, to be able to scroll the actively selected record.

    Once I have the selected record, I want a way to write a query to edit or delete the record.

    Is attached a photo of my query to select all of my table and connect data in my table (results).

    Attached a photo of my painting showing the timeline of my sql database.

    What is the best way to go on a record selection in a table and the modification of data with a query?

    Any help would be greatly appreciated.

    Thank you

    I guess that's not a table, but multi-column listbox.

    Right click, select--> highlight whole line selection Mode

    The value of the multicolumn listbox is the row index - you can write a local variable to highlight the line, the event structure to handle the user clicking on, etc.

    If you enable the property editable ListBox cells, you can allow users to edit the items of the listbox.

    If you want to get the data in row, you hint REF table and work with the array of strings in row - convert it to cluster, etc..

    I don't know, what type of data, it is, how you structure the database looks like, I don't even know if you use the wrapper to work with the database, I can't write queries for you.

    Something like Update Tablica Set Serial = '5' where ID = '22';

  • ORA-01445: cannot select ROWID, or sample, a view of join without key - preserved table form w/report and LOV

    I create a page "Form on a Table with Report" (APEX 5). Table I has 3 columns: cat_key, item_value, item_description. The cat_key is a foreign key in a table with columns cat_key, cat_value. I created the report and everything works fine.  The page of the report shows my domain cat_key in number, so I want it instead to display the cat_value. I change the field cat_key to a text based on LOV, select my LOV and now when I view the page of report I get the "'ORA-01445: cannot select ROWID from where sample, a join without key preserved table view ' error." The report uses the ROWID as a link to the edit page field.

    If I use the same tables and even shared LOV in a report page interactive, it works fine.

    What I am doing wrong?

    This is a limitation of the IR Apex will rewrite your query to a query that includes the lookup table and the columns. So now you have actually created a query on an inline view, which causes the error. You can see the query apex created when running in debug mode. APEX will join the table of choice with your primary table. For example from one of my IR:

    Select 'ID '...

    "MSL". "" HIS_COUNTRIES "=> my primary table

    ) ) b,

    (select rv_meaning d, rv_low_value r

    of msl_ref_codes_table

    where rv_domain = "JOHN".

    ) L1 = > query My LOV Lookup

    ...

    So, if possible, base your reports and forms on the real primary key, no rowid.

    You can also write the IR query with the search yourself:

    Select T1.rowid...

    of primary_table T1

    look_table L1

    ...

  • Create the form for selecting data in multiple tables

    Hello

    I'm getting APEX for the first time and I just read 2 days dev Application Express guide

    I tried to play and I can't create a report with the form that select data from several tables

    What I want to achieve is a report we'll say 'USERS' makes MANAGER_ID ID, NAME, with a form that allows me to create, delete, change users

    The problem is that, once the report with the form created, if I click on create (to create a user) it will ask me for id, name, and manager_id

    I need a water drop down which allows me to select managers in the table manager instead of manually insert Director id

    How do I do that?

    Thank you!

    HI Chris,

    LOV will use this magic.

    Search:

    Kind regards

    BEnjamin

  • What is the preferred means of data transmission as a type of record between the nested table of pl/sql program or an associative array

    What is the preferred means of data transmission in the associative array of the nested table record vs

    Choose between Nested Tables and associative arrays

    The two nested tables and associative arrays (formerly index - by tables) use similar index notation, but they have different characteristics when it comes to persistence and ease of passing parameters.

    Nested tables can be stored in a column of data, but can of associative arrays. Nested tables can simplify the SQL operations where you would normally join a single-column table with a larger table.

    Associative arrays are appropriate for relatively small lookup tables where the collection can be constructed in memory whenever a procedure is called or a package is initialized. They are good for the collection of the information volume is unknown beforehand, because there is no fixed limit on their size. Their index values are more flexible, as associative array indices can be negative, can be no sequential and can use values of string instead of numbers.

    PL/SQL automatically converts between the bays of the host and the associative arrays that use values of digital keys. The most effective way to move the collections to and from the database server is to implement data values in associative arrays, and then use these associative arrays with erections in bulk (the FORALL statement or BULK COLLECT clause).

    With the help of documents and Collections of PL/SQL

    Read this:

    How to pass the record set as a parameter of the procedure.

    https://community.Oracle.com/thread/2375173?TSTART=0

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