Question

In an SQL query, which built-in function is used to compute the number of rows in a table?

a) AVG
b) COUNT
c) MAX
d) MIN
e) MEAN

Answer 1

Correct Answer is B) .The SQL function used to count the number of rows in a table is COUNT. It can return the total number of rows or the number of non-NULL values in a specific column.

Step-by-step explanation:

The built-in function used in an SQL query to compute the number of rows in a table is COUNT. This function is used to return the number of rows that matches a specified condition. For example, if you want to know the total number of records in the 'employees' table, you would use the following SQL statement:

SELECT COUNT(*) FROM employees;

The COUNT function can also be used with a specific column name to count only non-NULL values in that column.

In an SQL query, the built-in function used to compute the number of rows in a table is the COUNT function. This function returns the number of rows that match a specified condition or all rows in the table if no condition is provided. Here's an example:

SELECT COUNT(*) FROM table_name;

This query will return the number of rows in the table_name table.