What scalar functions do you know?
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LEN() (in other SQL flavors – LENGTH()) – returns the length of a string, including the blank spaces
UCASE() (in other SQL flavors – UPPER()) – returns a string converted to the upper case
LCASE() (in other SQL flavors – LOWER()) – returns a string converted to the lower case
INITCAP() – returns a string converted to the title case (i.e., each word of the string starts from a capital letter)
MID() (in other SQL flavors – SUBSTR()) – extracts a substring from a string
ROUND() – returns the numerical value rounded to a specified number of decimals
NOW() – returns the current date and time