5 Tips to Get Most the Most Out of Oracle Database

Oracle is a stupendous RDBMS and comes with lots of robust features and tools that can be useful for an organization. But do you know there are a few things that you can do to optimize your queries and get the most out of your RDBMS? So, to help you out, today we are sharing with you five tips that you can use to get the most out of your Oracle database.

You Must Use ANSI Joins

In Oracle, you can join tables in two ways. You can either use “ANSI joins” or you can use “Oracle joins” to join tables.  If you use the ANSI method then you have to place the “JOIN” keyword between tables to join them. Whereas if you use the other method then you have to place the “WHERE’ keyword between the tables to join the tables. However, if you wish to get the most out of the database then you must not use this method for joining tables. Instead, you should use the ANSI method to join tables. Why you must use “ANSI joins”? You must use “ANSI joins” because these joins are arguably easier to find and read in large queries. Furthermore, it is very easy to forget to add the “WHERE” keyword in large queries. So, make sure you use “ANSI joins” if you wish to get the most out of your database.

Don’t Use WHERE Clause With Functions

Using the “WHERE” clause you can easily filter records that are present in your database table. However, a time may come when you have to use this clause to compare a column to a value that has a function.  But using the “WHERE” clause with functions is not a good practice and it may slow down the processing of the query. So, make sure you don’t use the “WHERE” clause with functions if you don’t want to slow down the processing of your query. To learn about the “WHERE” clause in more detail feel free to join Oracle Training Institute in Gurgaon.

Use Case Statement Rather Than Using Multiple UNION clauses

You may have to create several queries that lookup a range of records on the basis of particular criteria using the “UNION” clause. However, structuring a query like this is not a good practice. Why? Because if you structure your query like this then the tables will have to be queried once for every “Select” query. But this is not an efficient way of queering tables. However, by using the “CASE” statement you can easily optimize your queries and solve this problem. Using the “CASE” statement you can put the entire logic of the query inside one “SELECT” clause. This will eliminate the need for queering tables several times to get the result. So, make sure you use the “CASE” statement rather than using multiple joins to get the most out of your Oracle database.

Reduce Your Use of DISTINCT Clause

The “DISTINCT” clause helps a database developer retrieve unique records from a result set and eliminate duplicate results. Yes, it is an amazing clause and can be very useful. But sometimes you may face problems while using it. For example, if your result set displays data from various tables then you may get some duplicate results even when you are using the “DISTINCT” clause. Besides this, using the “DISTINCT “clause can also slow down the processing of a query. So, make sure you minimize the use of this clause if you wish to enhance the efficiency of your Oracle database.

Redesign Your Data Value Lists

Sometimes you may have to create queries that may use different values as criteria for retrieving data from a table. These queries often include a “WHERE” clause along with an “IN” keyword. Yes, the query will return the results that you want. But what if the business rules/ status values change in the future? If the business rule does change in the future, then you will have to modify your list of values and your query.

As a result, you may also have to update your entire application code. However, you can easily solve this problem by storing your data value lists in a different table and joining it with your primary table. This will eliminate the need of updating the entire query/application code when business rules change. So, make sure you redesign your data lists for using tables if you wish to get the most out of your database. To learn more about redesigning data lists, feel free to join the Oracle Online Training program.

Conclusion

Oracle is a stupendous RDBMS and you can easily optimize it by following all the above tips. So, do use all the above tips if you wish to get the most out of your RDBMS. These are small and simple tips but can do wonders for you.