Oracle-Index Tablo indexleri ile ilgili bazı scriptler

Tables/Indexes

Here are some scripts related to Tables/Indexes .

Tabs w/ Questionable Inds

TABLES WITH QUESTIONABLE INDEX(ES) NOTES:

Owner – Owner of the table

Table Name – Name of the table

Column – Name of the column in question 

The above query shows all tables that have more than one index with the same leading column. These indexes can cause queries to use an inappropriate indexes; in other words, Oracle will use the index that was created most recently if two indexes are of equal ranking. This can cause different indexes to be used from one environment to the next (e.g., from DEV to TEST to PROD).

The information does not automatically indicate that an index is incorrect; however, you may need to justify the existence of each of the indexes above. 

select 	TABLE_OWNER,
	TABLE_NAME,
	COLUMN_NAME
from  	dba_ind_columns
where  	COLUMN_POSITION=1
and  	TABLE_OWNER not in ('SYS','SYSTEM')
group  	by TABLE_OWNER, TABLE_NAME, COLUMN_NAME
having  count(*) > 1

 

 

Tabs With More Than 5 Inds

TABLES WITH MORE THAN 5 INDEXES NOTES:

Owner – Owner of the table

Table Name – Name of the table

Index Count – Number of indexes 

select 	OWNER,
	TABLE_NAME,
	COUNT(*) index_count
from  	dba_indexes
where  	OWNER not in ('SYS','SYSTEM')
group  	by OWNER, TABLE_NAME
having  COUNT(*) > 5
order 	by COUNT(*) desc, OWNER, TABLE_NAME