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Tip of the Day
Language: Relational Databases
Expertise: Beginner
May 13, 1997

Tables and SQL

Question:
How do you count the number of rows displayed in a DBGrid when displayed through a query? Using TQuery, I get 50 to 60 files, but want to know exactly how many rows passed the SQL query and are now being displayed.

Answer:
It's funny that something as important as row statistics is not well-documented in Delphi. Oh well, there's a lot to the program.

For TTable, TQuery and TStoredProc (if it returns a pointer to a cursor), you can get the Count of records by calling the RecordCount method, and the current record on which the cursor is positioned with the RecNo method.

To get a count of the number of rows returned from a query, don't look to the DBGrid. Instead, look to the TQuery itself, and use its RecordCount property to get the number of records being pointed at by its cursor.

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