In MariaDB, the SUM() aggregate function returns the sum of a given expression.
It can also be used to return the sum of all distinct (unique) values in an expression.
DBMS
Database Management Systems
How to Prettify JSON Formatted Query Results in SQLcl (Oracle)
If you use SQLcl to query Oracle Database, you might be aware of the SET SQLFORMAT json option, that makes query results come back as JSON documents.
But there’s also a json-formatted option, which returns the results in a more human readable format.
HAS_DBACCESS() – Discover if a User Can Access a Database in SQL Server
SQL Server has a HAS_DBACCESS() function that returns information about whether the user has access to a specified database.
How to List All Stored Procedures in Oracle Database
There are several data dictionary views that we can use to return a list of stored procedures in Oracle Database.
MIN() Function in MariaDB
In MariaDB, MIN() is an aggregate function that returns the minimum value in a given expression.
MAX() Function in MariaDB
In MariaDB, MAX() is an aggregate function that returns the maximum value in a given expression.
How to Remove Leading Zeros From Dates in Oracle
In Oracle Database, you can use the fm (fill mode) format modifier to suppress any leading zeroes that might be applied to a date. This format modifier suppresses padding, which includes leading zeros and trailing blanks.
To use the fm format modifier, include it in your format model when specifying how dates should be formatted. For example when using the TO_CHAR() function to format dates, or in NLS parameters such as the NLS_DATE_FORMAT parameter when setting the date format for your current session.
2 Ways to List all Functions in MariaDB
Below are two options for returning a list of functions in MariaDB.
4 Ways to List the Views in an SQLite Database
Here are four options for showing all views within an SQLite database.
PostgreSQL GROUP_CONCAT() Equivalent
Some RDBMSs like MySQL and MariaDB have a GROUP_CONCAT() function that allows you to return a query column as a delimited list (for example, a comma separated list).
PostgreSQL has a similar function called STRING_AGG(). This function works in pretty much the same way that GROUP_CONCAT() works in MySQL and MariaDB.