How can I index the Oracle database field date?

Oracle Database fields date How can I go to the index ？

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Other answers 1：

https://www.cnblogs.com/satire/p/16288645.html

See if I can help you

Other answers 2：

Write conditions normally , Do not format the indexed date field before querying , such as

  

   where to_char( Date fields ,'yyyymmdd') ='20220720';-- Don't walk index where  Date fields =date'2022-07-20' -- Go to the index where  Date fields >=date'2022-07-20' and  Date fields <date'2022-07-21' -- Walking range index where  Date fields =trunc(sysdate) -- Go to the index 
  

Other answers 3：

1. to_date The format is different , It affects whether the query is indexed
2. The data volume is in the 10% above , It is possible to scan the whole table , Instead of walking .
3. Type the field , Don't go by index

Borrow your question , Did a little test , I hope it helped you ,
Address ：https://www.modb.pro/db/442050