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Don Burleson Blog 







Loop through all tables in a database

Oracle Database Tips by Donald BurlesonJanuary 22, 2015

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

   'alter table '||table_name||' pctfree 10;'
from all_tables where owner = 'SCOTT;

spool off


Method 2: Loop through all tables using PL/SQL.  This will loop though all columns in the database: (pseudocode:  not tested)

order by column_name;
varchar_count integer;
   FOR my_list IN all_my_tables LOOP
     IF column_type in (VARCHAR, VARCHAR2) then varchar_count:=varchar_count+1 ;
     execute immediate . . .


There are other ways of looping through all tables and all columns within you database using SQL.




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