# Blog

- [How to install OracleDB on Docker](/how-to-install-oracledb-on-docker) — I come up with this problem yesterday, Oracle is potentiating their cloud solutions so they are not making it that easy to install their star product on a testing environment.
- [How to use Parameters in Stored Procedures?](/how-to-use-parameters-in-stored-procedures) — The Stored Procedures are an elegant way to store your code inside a SQL database. You can save your code and reuse it whenever you want to.
- [How to use a QUALIFY clause in SQL?](/how-to-use-a-qualify-clause-in-sql) — Qualify may be one of the most underestimate commands in SQL, as a Data Analyst, I use it a lot and I really hope after this tutorial you use it too.
- [Why is my SQL query taking so long?](/why-is-my-sql-query-taking-so-long) — This is one of the questions we almost always ask ourselves.
In this article, we are going to learn a bit about how to make an efficient query.