The OVERLAY function is used to replace a portion of a string with another string. It allows you to specify the position within the original string where the replacement should start and the length of the portion to replace. Here’s the basic syntax of the OVERLAY function: OVERLAY(string1 PLACING string2 FROM start_position [FOR length]) Here’s…

The strpos function in PostgreSQL database is used to find the position of a substring within a given string. It returns the position (counting from 1) of the first occurrence of the substring within the string. If the substring is not found, it returns 0. Here’s the syntax for the strpos function: strpos(source_string, search_string) Here’s…

The initcap function in PostgreSQL database is used to capitalize the first letter of each word in a string, while converting all other letters to lowercase. It’s often used to format text in a more readable or proper case. Here’s the syntax for the initcap function: initcap(input_string) The initcap function takes the input_string and returns…

The rpad function in PostgreSQL database is used to right-pad a string with a specified character or a set of characters until the resulting string reaches a specified length. This function is often used to format strings to a fixed width. Here’s the syntax for the rpad function: rpad(input_string, length, pad_string) The rpad function takes…

The rtrim function is used to remove characters from the right end (beginning) of a string. It takes two arguments: the input string and a list of characters to be removed from the right side of the input string. Here’s the syntax for the rtrim function: rtrim(input_string, characters_to_remove) where input_string is the string from which…

The ltrim function is used to remove characters from the left end (beginning) of a string. It takes two arguments: the input string and a list of characters to be removed from the left side of the input string. Here’s the syntax for the ltrim function: ltrim(input_string, characters_to_remove) where The ltrim function will return a…

The REPEAT function is used to repeat a string a specified number of times and concatenate the repetitions together to form a longer string. It takes two arguments: the string you want to repeat and the number of times you want to repeat it. Here’s the basic syntax of the REPEAT function: REPEAT(string, count) Here’s…

The REVERSE function is used to reverse the order of characters in a given string. It takes a string as an argument and returns a new string with the characters reversed. Here’s the basic syntax of the REVERSE function: REVERSE(string) Here’s an example of using the REVERSE function: SELECT REVERSE(‘Hello, World!’); — Returns ‘!dlroW ,olleH’…

The LOWER function is used to convert all characters in a given string to lowercase. It takes a string as an argument and returns a new string where all alphabetic characters have been converted to their lowercase equivalents. Here’s the basic syntax of the LOWER function: LOWER(string) Here’s an example of using the LOWER function:…

The UPPER function is used to convert all characters in a given string to uppercase. It takes a string as an argument and returns a new string where all alphabetic characters have been converted to their uppercase equivalents. Here’s the basic syntax of the UPPER function: UPPER(string) Here’s an example of using the UPPER function:…