Pragma UDF & Deterministic

Hello everyone, I wanted to write about something simple and can improve the performance of your sql statements. Unfortunately, many database developers use too much plsql function in their SQL statements. I say too much because if you learn more about the SQL, you will use less plsql. SQL is very capable language to process […]

PLSQL and Flashback Data Archive Problems.

Hi, I have written about flashback data archive before. if you didn’t read please check these post first. http://mustafakalayci.me/2019/03/02/goodbye-log-triggers-welcome-flashback-data-archive/ http://mustafakalayci.me/2020/09/10/flashback-data-archive-problems/ I’ve already mentioned about some problems on my second post but these are not kind of problems which will stop your work. The problem I am about talk is that kind of problem. From my […]

Oracle Table Compression Part1

Hi, I have been dealing with table compression a lot during my development period and I still do. I wanted to share some information about table information but I believe this will be a long explanation so I will write them in parts and this is part1. Table compression is a very useful feature of […]

Redo Log Switch Order

Hi, I always have the impression that redo log switch occurs in group number order but a small test showed me, I was wrong. As you know redo log is one of the most important part of a Oracle database. it almost protect everything! your data in memory, data file, your transaction etc.  whenever you […]

Oracle Join Methods

Hi, Actually I won’t explain anything today. I will just share a video by Chris Saxon who is also from askTom team. Great guy, you should also follow him. So he made a great, so simple and explanatory video that I have ever seen. Many thanks to Chris. Please watch.