In PostgreSQL, the CONCAT() function accepts multiple strings as arguments and concatenates them to a single string. Strings can be char, text, or varchar.
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How to Use the UNION Clause/Operator in PostgreSQL
In PostgreSQL, the UNION clause/operator combines the result sets of two or more queries. It doesn’t return the duplicated rows in the combined set.
PostgreSQL ROUND() Function With Examples
PostgreSQL provides a built-in function named the ROUND() function that accepts either one or two arguments/values. It rounds a number to the nearest integer.
How to Convert a String to a Number in PostgreSQL
Specify a string followed by “::” and then write the data type to convert the given string into the targeted type like integer, decimal, or double precision.
How to Use TO_NUMBER() Function in PostgreSQL
TO_NUMBER() is used to convert a character string to a number. The TO_NUMBER() function accepts two parameters, a “string” and a “format”.
PostgreSQL BOOLEAN Data Type With Examples
In PostgreSQL, the BOOLEAN or BOOL data type takes only 1 byte to store a value in a database, and it returns one of two probable values: True or False.
PostgreSQL BIGINT Data Type With Examples
BIGINT is a numeric data type in PostgreSQL that stores the integer values. It stores a value between -9,223,372,036,854,775,808 to +9,223,372,036,854,775,807.
What Does DROP TABLE CASCADE do in PostgreSQL
In PostgreSQL, the CASCADE option is used with the DROP TABLE command to drop/delete a table along with its dependent objects.
How to Alter Column Type in PostgreSQL
To alter column’s type in PostgreSQL, use the “SET DATA TYPE” or “TYPE” keyword with the ALTER TABLE and ALTER COLUMN commands.
How to Use DATE_PART() Function in PostgreSQL
DATE_PART() function in PostgreSQL is used to extract/retrieve a specific part(like a month, year, hour, minutes, etc.) from a TIMESTAMP/Source.
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