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create or pelace procedure mypro(expre in varchar2)
as
begin
....
....  where expre
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SQL code:
SQL> desc t1
Name Null? Type
----------------------------------------- -------- ----------------------------

ID NUMBER
NAME VARCHAR2(10)
SQL> create or replace procedure mypro(t_name in varchar2,col_name in varchar2,c
ol_type in varchar2)
2 as
3 flag number;
4 cmd varchar2(40);
5 begin
6 select count(*) into flag
7 from all_tab_columns
8 where owner='SCOTT' and
9 table_name=t_name and
10 column_name=col_name;
11 if flag=0 then
12 cmd:='alter table '||t_name||' add ('||col_name||' '||col_type||')';
13 execute immediate cmd;
14 end if;
15 end;
16 /

Procedure created.
SQL> exec mypro('T1','SEX


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