What is NULLIF() and How to Use it in PostgreSQL? It is a built-in function in Postgres that accepts a couple of arguments and retrieves a NULL value if both arguments are equal or if either of the specified arguments is NULL. It retrieves the first argument if both arguments are not...
In PostgreSQL, various built-in functions are used to deal with the JSON and JSONB data efficiently, such as TO_JSONB(), JSONB_ARRAY_ELEMENTS(), JSONB_BUILD_ARRAY(), and many more. Among them, the most frequently used function isJSONB_SET()which inserts or updates the given value at...
1.What is the PostgreSQL UNNEST() function? The UNNEST() function in PostgreSQL is used to expand an array into a set of rows. It takes an array as input and returns a new table where each element of the array occupies a separate row. 2.Why is the PostgreSQL UNNEST() function useful?
PostgreSQL SUM function example The sample table If we want to calculate the total sum of salary for all employees in theemployeetable, the following SQL can be used. SQL Code: SELECT SUM(salary) FROM employee; Output: Visual Presentation of PostgreSQL SUM() PostgreSQL SUM as a level If we...
We’ll use the sales_stats table created in the CUME_DIST() function tutorial to demonstrate the NTILE() function. SELECT year, name, amount FROM actual_sales ORDER BY year, name; 1) Using PostgreSQL NTILE() function over a result set example This example uses the NTILE() function to ...
Integrate HubSpot to PostgreSQL Get a DemoTry it Remarks with the PostgreSQL To_Timestamp Function FX prefix TheTO_TIMESTAMP()function skips the spaces in the input string till the (FX prefix) is used. For example, the below code uses multiple spaces in the string. TheTO_TIMESTAMP()functi...
PostgreSQL Version: 9.3 Visual Presentation of PostgreSQL REPLACE() function Simple Replacement In the example below, the specified string 'st' have been replaced by '**' in the string 'test string'. SQL Code: -- Replace 'st' with '**' in the given string 'test string' ...
PostgreSQL Version: 9.3 Visual Presentation of PostgreSQL CONCAT() function Example: PostgreSQL CONCAT() function In the example below the strings specified in the argument have been concatenated and returns a string. -- This SELECT statement uses the CONCAT() function to concatenate multiple strings...
Here, we create a function namedCalculateAge. Furthermore, the function utilizes PostgreSQL’s built-inage()function to determine the difference between two dates. Since only one argument is provided,age()calculates the difference between the given date and the current date. Consequently, theCalcula...
jsonb_set --- {"name": "John", "skills": ["PostgreSQL", "Web Dev"]} (1 row) In this example: {"name": "John", "skills" : ["PostgreSQL", "API"]} is the original JSON object. {skills,1} is a path that specifies the skills key, which is an array, and 1 specifies the ...