Question:
I have an Oracle dataase where I want to be able to loop
through all of the tables in my schema. How do you
write a script that loops through all tables in a database?
Answer: There are two way to loop
through all tables in a database, depending on what you want
to do. Also see my notes on
loop_between_multiple_servers and databases
Method 1: Loop through all tables in
SQL*Plus
spool runme.sql
select
'alter table
'||table_name||' pctfree 10;'
from
all_tables where owner = 'SCOTT;
spool off
runme.sql
Method 2: Loop through all tables using PL/SQL.
This will loop though all columns in the database:
(pseudocode: not tested)
DECLARE CURSOR
all_my_tables
IS SELECT COLUMN_NAME,
TABLE_NAME, DATA_TYPE from USER_COLUMNS
order by column_name;
varchar_count integer;
BEGIN
FOR my_list IN all_my_tables LOOP
IF column_type in (VARCHAR, VARCHAR2) then
varchar_count:=varchar_count+1 ;
execute immediate . . .
END LOOP;
utl_file.put_ine(varchar_count);
END;
/
There are other ways of looping through all tables and
all columns within you database using SQL.
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