How to create dynamic table in oracle with dynamic column name and dynamic data type without any views or any other table type

Question

Thanks for everything, we can create a table dynamically using a query execute immediate. But when we create the table, it was created, but if I wanted to dynamically create a table with a dynamic column, the question was raised. I actually created the table, but when I created the columns along with the table, a lot of errors came up. Below is the code I wrote in Oracle in the procedure.

declare
    no_of_cols number:=&no_of_cols;
    colname varchar2(20);
    coldata varchar2(20);
    i number;
begin
    execute immediate 'create table smap1(nam varchar2(10))';
    age:='age';
    datf:='number'
    if(no_of_cols>=2) then
        for i in 2..no_of_cols loop
            colname:=age;
            coldata:=datf;
            execute immediate 'alter table smapl add '||colname||' '||coldata;  
        end loop;
    end if;
end;

then this code is executed with four columns of the same type, if no_of_cols is 5. Then I changed the code and ran the plsql program. The program is as follows

declare
no_of_cols number:=&no_of_cols;
colname varchar2(20);
age varchar2(20);
datf varchar2(20);
coldata varchar2(20);
i number;
begin
    execute immediate 'create table smap1(nam varchar2(10))';
    if(no_of_cols>=2) then
        for i in 2..no_of_cols loop
            age :=&age;
            datf:=&datf;
            colname:=age;
            coldata:=datf;
            execute immediate 'alter table smapl add '||colname||' '||coldata;  
        end loop;
    end if;
end;

Below are the errors that are generated when creating the specified procedure

  [Error] Execution (13: 19): ORA-06550: line 13, column 19:
  PLS-00103: Encountered the symbol ";" when expecting one of the following:

  ( - + case mod new not null <an identifier>
  <a double-quoted delimited-identifier> <a bind variable>
  continue avg count current exists max min prior sql stddev
  sum variance execute forall merge time timestamp interval
  date <a string literal with character set specification>
  <a number> <a single-quoted SQL string> pipe
  <an alternatively-quoted string literal with character set specification>
  <an alternatively

i plsql, plsq

declare
no_of_cols number:=&no_of_cols;
colname varchar2(20):='&colname';
coldata varchar2(20):='&coldata';
i number;
begin
 execute immediate 'create table smap1(nam varchar2(10))';
if(no_of_cols>=2) then

    for i in 2..no_of_cols loop
       execute immediate 'alter table smapl add '||colname||' '||coldata;  
    end loop;
end if;
end;

, doenot

[Error] Execution (1: 1): ORA-02263: need to specify the datatype for this column
 ORA-06512: at line 10

Answer 1

EXECUTE IMMEDIATE

:

SQL ( ) PL/SQL- ( ).

EXECUTE IMMEDIATE.

execute immediate 'create table smap1(nam varchar2(10));'; -- this is your code
execute immediate 'create table smap1(nam varchar2(10))';  -- correct code, no semicolon at end

.

, (&variable)

SQL * Plus : script . script verbatim, .

, script SQL * Plus , (&colname &coldata), . "" "", SQL * Plus script :

declare
    -- omitted to add clarity
begin
    execute immediate 'create table smap1(nam varchar2(10));';
    if(no_of_cols>=2) then
        for i in 2..no_of_cols loop
            colname:=age;
            coldata:=number;
            execute immediate 'alter table smapl add '||colname||' '||coldata;  
        end loop;
    end if;
end;

, , , :

colname varchar2(30) := '&colname'; -- notice the single quotes

, "" colname SQL * Plus :

colname varchar2(30) := 'age';

, , SQL * Plus .

Answer 2

:

sqlcmd varhchar(30000);
begin
    sqlcmd := 'create table smap1(nam varchar2(10))';
    DBMS_OUTPUT.PUT_LINE(sqlcmd);
    execute immediate sqlcmd;
    if(no_of_cols>=2) then
        for i in 2..no_of_cols loop
            age :=&age;
            datf:=&datf;
            colname:=age;
            coldata:=datf;
            sqlcmd := 'alter table smapl add '||colname||' '||coldata;  
            DBMS_OUTPUT.PUT_LINE(sqlcmd);
            execute immediate sqlcmd;
        end loop;
    end if;