Software engineering facts, information, and skills tagged as SQL
Regex and iregex are the two field lookups that enable us to search database with regular expressions. regex is case-sensitive where as iregexis case-insensitive.
Field lookups are how we specify the conditions in the WHERE clause of an SQL. They are specified as keyword arguments for QuerySet methodslike filter(), exclude() and get().
Field lookups are how we specify the conditions in the
WHERE clause of an SQL. They are specified as keyword arguments for QuerySet methodslike
Very often, you will have the requirement to concatenate two columns in a table, on the fly in
SELECT SQL. For example, first name and last name needed to be combined at username. The + operator is available in MicroSoft's database servers, but it is not part of PostgreSQL or SQL standard. PostgreSQL very well support string concatenation in SQL results. Let us assume that we have a table like
Python is an interpreted(processed at runtime by the interpreter), object-oriented(supports Object-Oriented style), interactive, simple, easy to learn, portable, extensible, embeddable, high-level programming language for general-purpose programming. Created by Guido van Rossum at the National Research Institute for Mathematics and Computer Science in the Netherlands and first released in 1991. Python is derived from ABC, Modula-3, SmallTalk, Algol-68, C, C++, Unix shell and other scripting languages.Python's source code is avaliable under the GNU General Public License (GPL) which guarantees end users the freedom to run, study, share and modify the software.