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    <p>As you said you call a procedure to create a table from view. So I assume that you already are using dynamic SQL (Native Dynamic SQL aka <code>EXECUTE IMMEDIATE</code> statement or <code>DBMS_SQL</code> package) to execute DDL statements. Then you could generate more complicated <code>CREATE TABLE AS</code> statement with using the Oracle dictionary views such as <a href="http://docs.oracle.com/cd/B19306_01/server.102/b14237/statviews_4489.htm" rel="nofollow">USER_VIEWS</a> and <a href="http://docs.oracle.com/cd/B19306_01/server.102/b14237/statviews_4462.htm" rel="nofollow">USER_TAB_COLUMNS</a> to get info about columns' types, length, scale and whatever else you may need to write a right CAST call. </p> <p>A dirty example is below:</p> <pre><code>create or replace view v as select decode(dummy, 'Y', '123') s , 1 n , 2.2 f , cast (1.1 as number(5,3)) fs from dual / set serveroutput on declare l_query varchar2(32767) := 'create table t as select &lt;column list&gt; from v'; l_type varchar2(100); begin for tc in ( select * from user_tab_columns where table_name = 'V' order by column_id ) loop l_type := tc.data_type; l_type := l_type || case tc.data_type when 'NUMBER' then case when tc.data_precision is not null then '(' || tc.data_precision || case when tc.data_scale is not null then ','||tc.data_scale end || ')' end when 'VARCHAR2' then '(' || tc.char_length || ' ' || case tc.char_used when 'C' then 'char' else 'byte' end || ')' end; l_query := replace(l_query, '&lt;column list&gt;', 'cast("'||tc.column_name||'" as '|| l_type ||') "'||tc.column_name||'" ,&lt;column list&gt;'); end loop; l_query := replace(l_query, ',&lt;column list&gt;'); dbms_output.put_line(l_query); end; / </code></pre> <p>Results:</p> <pre><code>view V created. anonymous block completed create table t as select cast("S" as VARCHAR2(3 char)),cast("N" as NUMBER),cast("F" as NUMBER),cast("FS" as NUMBER(5,3)) from v </code></pre> <p>Good luck.</p>
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    1. POzero-length columns are not allowed - Creating a table from view
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    1. COGood answer. I think that using data dictionary is a right way to do this thing. But example code works only with primitive data types and needs to be expanded for types like `timestamp` and reproduce type name at any other case.
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    2. COSuper thank you. I tried something like this and it worked... create view dummy_view as select 1 as id , null as dept_no , 'naga' as name from dual; create table dummy_table as select * from dummy_view UNION ALL Select cast(null as number) , cast(null as varchar2(10)), cast(null as varchar2(10)) from dual where 1=2
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    3. COOf course, code must be expanded, it's only an example to show the idea.
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