What is difference between count () and count (*) function?
- What is the difference between COUNT fieldname and COUNT (*) function explain with an example?
- What is COUNT () in SQL?
- What is the difference between COUNT COUNT distinct and COUNT (*)?
- What is COUNT (*) used for?
What is the difference between COUNT fieldname and COUNT (*) function explain with an example?
Count(fieldname): Do not use the size field for the resulting records. 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 COUNT () in SQL?
The SQL COUNT(), AVG() and SUM() Functions The COUNT() function returns the number of rows that matches a specified criterion.
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 COUNT (*) used for?
COUNT(*) The COUNT(*) function returns the number of rows in a dataset using the SELECT statement. The function counts rows with NULL, duplicate, and non-NULL values.
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