PostgreSQL array
- 28 September 2020
- Software Engineering
In PostgreSQL we can define a column as an array of valid data types. The data type can be built-in, custom or enumerated. In addition, arrays play an…
Pandas instead of SQL: Working with data in a new way
- 24 September 2020
- Machine learning
Previously, SQL as a tool was enough for research analysis: quick data search and preliminary report on data.
Nowadays, data come in different f…
Basic methods for securing your online application
- 22 September 2020
- Software Engineering
Publicly available web applications are interesting for hackers as resources or earning tools. The range of applications of information obtained …
Fix typical errors in MySQL
MySQL is an open-source database management system (DBMS) from Oracle. It was developed and optimized specifically for web applications.MySQL is …
SQL window functions; what are they and why are they needed?
- 21 September 2020
- Database Performance Management
Many developers, even those who have long been familiar with SQL, do not understand window functions, considering them some kind of special magic…
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