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How to Comment in PostgreSQL

In Postgres, double hyphen “--” sign is used for single-line comments, while to use multi-line comments, you need to enclose the comments within “/*” and “*/”.

How to Create Arrays in PostgreSQL

To create an array in Postgres, users must specify the column name, then the data type, followed by the square brackets “[]”.

PostgreSQL UPPER() Function With Practical Examples

Postgres' UPPER() function accepts a string as an argument and converts the string’s case to upper. It can accept any character string, such as CHAR, TEXT, and VARCHAR.

PostgreSQL LOWER() Function With Practical Examples

PostgreSQL provides a built-in string function named LOWER() that accepts a string as an argument and converts it into lowercase.

How to Use FLOOR() Function in PostgreSQL

In PostgreSQL, the FLOOR() function is one of the math functions that accept a numeric value or expression and round down the given number to the nearest integer/whole number.

How to Use TRIM() Function in PostgreSQL

TRIM() is an inbuilt function in Postgres that accepts a string and deletes the leading, trailing, or both leading and trailing spaces or characters from a string.

How to Use MD5 Function in PostgreSQL

PostgreSQL provides a built-in function named MD5 that accepts a string as an argument and converts it into a 32 characters text string. It retrieves the resultant value in the hexadecimal.

How to Use LOG() Function in PostgreSQL

PostgreSQL provides a built-in mathematical function named LOG() that calculates the logarithm of a number to the base ten or the specified base.

How to Use CEIL() Function in PostgreSQL

Postgres provides a CEIL() function that takes a numeric value or an expression as an argument and rounds up the given value/expression to the next whole number.

How to Use TRUNC() Function in PostgreSQL

In PostgreSQL, TRUN() function is one of the math functions that accept a numeric value and truncates its entire fractional part or up to specific decimal places.