What is aggregate and Scalar Functions - Web Development

What is aggregate and Scalar Functions

What are Aggregate and Scalar capacities?

A total capacity performs activities on an accumulation of qualities to restore a solitary scalar worth. Total capacities are regularly utilized with the GROUP BY and HAVING provisions of the SELECT articulation. Following are the broadly utilized SQL total capacities:

AVG() – Calculates the mean of an accumulation of qualities.

Check() – Counts the absolute number of records in a particular table or view.

MIN() – Calculates the base of an accumulation of qualities.

MAX() – Calculates the limit of an accumulation of qualities.

Entirety() – Calculates the whole of an accumulation of qualities.

FIRST() – Fetches the main component in an accumulation of qualities.

LAST() – Fetches the last component in a gathering of qualities.

Note: All total capacities portrayed above disregard NULL qualities aside from the COUNT work.

A scalar capacity restores a solitary worth dependent on the information esteem. Following are the generally utilized SQL scalar capacities:

LEN() – Calculates the all out length of the given field (segment).

UCASE() – Converts an accumulation of string esteems to capitalized characters.

LCASE() – Converts a gathering of string esteems to lowercase characters.

MID() – Extracts substrings from a gathering of string esteems in a table.

CONCAT() – Concatenates at least two strings.

RAND() – Generates an irregular accumulation of quantities of given length.

ROUND() – Calculates the round off whole number an incentive for a numeric field (or decimal point esteems).

Presently() – Returns the present information and time.

Configuration() – Sets the organization to show an accumulation of qualities.

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