SQLite’s JSON functions and operators are now enabled by default, starting from SQLite 3.38.0 (released on 22 February 2022).
Continue readingTag: functions
SQLite SUBSTRING() Explained
In SQLite, substring() is an alias for substr().
It returns a substring from a string, based on a given starting location within the string. Two arguments are required, and a third optional argument is accepted.
The substring() naming was introduced in SQLite 3.34.0, which was released on 1st December 2020. The reason that the substring() syntax was introduced was for compatibility with SQL Server.
SQLite Renames PRINTF() to FORMAT()
SQLite has introduced the FORMAT() function, which can be used to format strings.
More precisely, it has actually just renamed its SQL PRINTF() function to FORMAT(). The reason is for better compatibility with other DBMSs. The original PRINTF() name is retained as an alias for backwards compatibility.
The FORMAT() function (or its naming) was introduced in SQLite 3.38.0, which was released on 22 February 2022.
SQLite Introduces the UNIXEPOCH() Function
SQLite 3.38.0 was released on 2nd February 2022. With it came some enhancement to the date and time functions.
One of those enhancements is the addition of the UNIXEPOCH() function. This function returns a unix timestamp. That is, the number of seconds since 1970-01-01 00:00:00 UTC.
List All Functions in Oracle Database
Here are several ways to get a list of functions in Oracle Database.
Continue readingHow NULLIF() Works in SQL Server
In SQL Server, the NULLIF() expression checks the value of two specified expressions. It returns a null value if they’re equal, otherwise it returns the first expression.
2 Ways to List all Functions in MySQL
Below are two options we can use to return a list of functions in MySQL.
Continue readingSCHEMA() Function in MySQL
In MySQL, the SCHEMA() function is a synonym for the DATABASE() function. It returns the default (current) database name.
The result is returned as a string in the utf8 character set. If there is no default database, it returns NULL.
SUM() Function in PostgreSQL
In PostgreSQL, the SUM() function computes the sum of the non-null input values and returns the result.
In other words, it adds numbers and returns the result.
Continue readingAVG() Function in PostgreSQL
In PostgreSQL, the AVG() function computes the average (arithmetic mean) of all the non-null input values, and returns the result.