问题
How can I out how many rows I obtained after execution?
My query is:
SELECT a.Emp,b.orders
from table as a inner join table1 b
on a.ID = B.ID
How do I find the number of rows returned in the above join?
回答1:
You either have to use SELECT COUNT(*) ... with the same condition or add a column with the row-count via ROW_NUMBER function:
SELECT a.Emp,b.orders, RN = ROW_NUMBER () OVER (ORDER BY a.Emp,b.orders)
FROM table as a inner join table1 b on a.ID=B.ID
...or use @@ROWCOUNT after the select.
Instead of ROW_NUMBER it's easier to use COUNT(*) OVER ( Order By ...) where each row contains the same total-count whereas ROW_NUMBER would return a sequential number where only the last record(acc. to the ORDER BY) would have the total-count.
So what Aaron has already meantioned in his answer.
回答2:
-- statement here
SELECT @@ROWCOUNT;
You can also get it on every row of the statement, but of course this is a little more expensive, e.g.
SELECT x, y, z, COUNT(*) OVER() FROM ...
来源：https://stackoverflow.com/questions/21416291/how-to-get-total-number-of-rows-in-a-executed-select-statement