PostgreSQL offers a variety of built-in functions to handle the TEXT data, such as SUBSTRING(), RPAD(), TRIM(), etc. One such function isLPAD()or “left padding” which fills a string of a specific length with a substring. It fills/pads the given string from the left side. This pos...
PostgreSQL is a relational database that facilitates its users with different built-in functions and operators. One such built-in function is “pg_sleep()” which is used to delay a query for a specified time period. It suspends the execution of the current process for a specific number of ...
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In PostgreSQL, you can convert a value to a timestamp using the TO_TIMESTAMP() function. For example, TO_TIMESTAMP('2023-10-07 12:34:56', 'YYYY-MM-DD HH24:MI:SS') converts the string to a timestamp. How to get timestamp in PostgreSQL? How to convert text column to timestamp...
PostgreSQL PostgreSQL UNNEST() function with Example : This function is used to expand an array to a set of rows.
PostgreSQL SUM function exampleThe sample tableIf we want to calculate the total sum of salary for all employees in the employee table, the following SQL can be used. SQLCode:SELECT SUM(salary) FROM employee; CopyOutput:Pictorial Presentation of PostgreSQL SUM()PostgreSQL SUM as a level...
For backward compatibility, PostgreSQL supports the older syntax based on:=as follows: selectget_film_count(len_from :=40,len_to :=90); 3) Using mixed notation The mixed notation is the combination of positional and named notations. For example: ...
1) Basic PostgreSQL MAKE_DATE() function example The following example uses theMAKE_DATE()function to generate the date2024-03-25: SELECTMAKE_DATE(2023,3,25); Output: make_date---2023-03-25(1 row) 2) Using the MAKE_DATE() function with leap years TheMAKE_DATE(...
A function can be used in a query by passing any relevant parameters to it. For example:SQL Copy SELECT myfunction(3), CatID, CatName FROM myCats In-built functionsPostgreSQL includes many in-built functions that you can use in your queries. Theses cover making comparisons...
PostgreSQL Version: 9.3 Pictorial Presentation of PostgreSQL REPLACE() function Simple Replacement In the example below, the specified string 'st' have been replaced by '**' in the string 'test string'. Code: -- Replace 'st' with '**' in the given string 'test string'SELECTreplace('test...