Computer Science for IGCSE & O level - Databases (Section 5 - No. 32)
What is the purpose of the 'COUNT' function in SQL?
To calculate the average of a column's values.
To count the number of rows.
To find the smallest value in a column.
To calculate the sum of values in a column.
Vysvětlení
The COUNT function is designed to count the number of records or rows.