What is the difference between count fieldname and count (*) function explain with an example?

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Count(fieldname): Again in simple words, COUNT(expression) evaluates an expression for each row in a group and returns the number of non-null values. So count() includes nulls, the other method doesn't. Note: COUNT(Id) in SOQL is equivalent to COUNT(*) in SQL.

What is the difference between count () and count (*) function with example?

Difference between count(*) and count(columnName) in MySQL? The count(*) returns all rows whether column contains null value or not while count(columnName) returns the number of rows except null rows.

What is the difference between count (*) and count attribute?

The difference is simple: COUNT(*) counts the number of rows produced by the query, whereas COUNT(1) counts the number of 1 values.

What is the difference between Count Count distinct and count (*)?

Count would show a result of all records while count distinct will result in showing only distinct count. For instance, a table has 5 records as a,a,b,b,c then Count is 5 while Count distinct is 3.

What is the difference between count (*) and Count 1 in Oracle?

According to this theory, COUNT(*) takes all columns to count rows and COUNT(1) counts using the first column: Primary Key. Thanks to that, COUNT(1) is able to use index to count rows and it's much faster.

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