Tag Archives: sql

SQLite, again (updated)

Posted on June 22, 2021 by Giovanni Giorgi
SQLite is slowing becoming a new standard. It is fast, and has a growing number of features. Useful settings PRAGMA journal_mode = wal; PRAGMA foreign_keys = true; Query, set, or clear the enforcement of foreign key constraints. PRAGMA busy_timeout=….; In milliseconds, … Continue reading →
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SQL: One of the most valuable skills – Craig Kerstiens

Posted on February 20, 2019 by Giovanni Giorgi
I admit it. I suffered from an “algebra narcoleptic syndrome” during my relational database lessons at University (1996 circa). Ok it is a fake. But it seems so real on these days. I was unable to avoid sleeping. I learned … Continue reading →
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Outer full and inner SQL joins: you are wellcome

Posted on August 27, 2018 by Giovanni Giorgi
For a complete description see https://www.codeproject.com/Articles/33052/Visual-Representation-of-SQL-Joins
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SQLite Oracle Compatibility Layer

Posted on August 7, 2018 by Giovanni Giorgi
  It aims to provide a minimal compatibility with Oracle. The need was having some regular expression functions, and I do not like to work with risky C code, like this university project did Github link: https://gitlab.com/daitangio/sqlite_ora_functions
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Removing duplicate rows in PostgreSQL, Oracle and SQLite

Posted on June 16, 2017 by Giovanni Giorgi
Sometimes you need to remove nasty duplicate on a table, based on a subset of the column. On every big database there is something called “rowid” which can be used to indentify a column in a unique way. On PostgreSQL … Continue reading →
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Oracle SQL Developer Keep Alive plugin

Posted on January 26, 2017 by Giovanni Giorgi
On some environment, on some customers, Oracle connections are drop after some idle time (i.e. 2 minutes). I have found a small plugin for Sql Developer to solve this issue: it is very handy and logs its usage. Code is also … Continue reading →
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