How to list all the tables that have no data

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  Hello
  
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  Suri wrote:
  Hello

  I use Oracle 9i.

  10 tables were present in my current schema. All tables are not having all the records.

  I need to insert test data in each table using a single procedure. (the table name is inparameter for the procedure)

  For example, I test_emp, test_sal tables.

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  I need to insert some test data in these tables. I shouldn't use utl_file or sql * loader for this.

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  SELECT decode(u.DATA_TYPE,'VARCHAR2',dbms_random.string('A', u.data_length),'NUMBER',TRUNC(dbms_random.value(1, 5000)),'DATE',SYSDATE) val_list
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  WHERE TABLE_NAME = p_table_name;  
  
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  I am not able to transmit these values to the collection dynamically to the INSERT statement. I tried many ways, but I am not satisfied with the code I've written.

  Please help me if you know a better idea.

  Thank you
  Suri

  With some effort, you can write dynamic insert queries. Read the data dictionary views ALL_TABLES and ALL_TAB_COLUMNS to get the data you need. You may need to limit the list to the tables you specify to hardcode the names of the tables. You can read the views for the information of table and column that you need generate the insert column orders. It will be a lot of work and it might be easier to simply hardcode values. Dynamic SQL is difficult to debug and work with: (.) Something like this (untested and totally undebugged)

  declare
    cursor v_tab_col(p_table_name) is select * from all_tab_columns where table_name = p_table_name;
    v_text varchar2(32767);
    v_table_name varchar2(30);
  begin
    v_table_name := 'DUAL';
    --chr(10) is a newline for readability when debugging
    v_text := 'insert into '||v_table_name||chr(10)||'(';
    --loop to build column list
    for v_tab_rec in v_tab_col loop
      --add comma if not first item in list
      if v_tab_col%rowcount > 1 then
        v_text := v_text ||',';
      end if;
      v_text := v_text || v_tab_rec.column_name;
    end loop;
    v_text := v_text ||') values ('||
    --loop to build column values
    for v_tab_rec in v_tab_cur loop
      if (v_tab_rec.datatype = 'VARCHAR2') then
        --add comma if not first item in list
        if v_tab_col%rowcount > 1 then
          v_text := v_text ||',';
        end if;
        if v_tab_rec.datatype = 'NUMBER' then
         v_text := v_text || '9';
         elsif v_tab_rec.datatype = 'VARCHAR2' then
           v_text := v_text ||'X';
        end if;
    end loop;
    v_text := v_text || ')';
    execute immediate v_text;
  end;
  

  This code is not effective, but shows how to do what you described. You'll have to code for all data types you need and find a way to take into account the primary/foreign keys, yourself. I leave it to you to find a way to avoid selecting the data twice ;)
  Good luck!

  Published by: riedelme on July 24, 2012 13:58

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• find tables that have no data

  Hi guys,.

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  I also want to find then of these tables that have names of data columns and then I want a search on that columns with column name

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