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Useful SQL queries and tips



1
How to find all indexes associated with a table in Oracle
select index_name, table_name from all_indexes where lower(TABLE_NAME)=lower(<your_table_name>) and OWNER='<owner>'
2
How to view DDL for any index in Oracle
select dbms_metadata.get_ddl('INDEX',<index_name> ','<owner>') from dual;
3
How to view DDL for any view in Oracle
select dbms_metadata.get_ddl('VIEW',<view_name>,'<owner>') from dual;
4
What to do when sqlplus is not displaying all lines in output
Run below on sqlplus prompt:
set heading off;
set echo off;
Set pages 999;
set long 90000; 
5
How to edit a sql you previously ran on sqlplus prompt
Type ‘ed’ on prompt
SQL> ed
This will open a vi editor with your last sql query. Edit it and save and exit
Type ‘r’ on prompt
SQL> r
This will run the updated sql.
6
How to run a sql script in sqlplus
@<fullpath of your sql>
7
How to find owner of a TABLE
SELECT OWNER, TABLE_NAME FROM ALL_TABLES where lower(TABLE_NAME) = lower(<TABLE>);




To be Continued...

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