The SQL query uses the `COUNT (*)` function incorrectly, leading to an inaccurate count. The `COUNT (*)` function counts all rows in a group, even if they have `NULL` values in the specified columns.

The solution modifies the SQL query to use `COUNT(column1), COUNT(column2), ...` instead of `COUNT(*)`. This ensures that only rows with non-NULL values in the specified columns are counted. For the ...

The Count function helps you easily create a query that, based on any criteria, sums up the number of Access records you have. Here's how to use it. The Count function helps you easily create a query ...

I've tried all kinds of combinations of selecting the top 10 with a count query but can't seem to get the 10 records to be anything but the last 10 inserted. <BR><BR>Not being a strong SQL guy ...

I’ve created a script that monitors a table in a SQL Server database. I’m only interested in one column in the table: TimeStamp. If the maximum (newest) value in TimeStamp is more than 30 minutes ...

Dino Esposito explains JSON-to-rowset native support in SQL Server 2016 and provides a realistic perspective of data query when you have JSON data stored in the database.