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Fastest way to determine if record exists
As the title suggests... I'm trying to figure out the fastest way with the least overhead to determine if a record exists in a table or not.
Sample query:
SELECT COUNT(*) FROM products WHERE products.id = ?;
vs
SELECT COUNT(products.…
Count number of records returned by group by
How do I count the number of records returned by a group by query,
For eg:
select count(*)
from temptable
group by column_1, column_2, column_3, column_4
Gives me,
1
1
2
I need to count the above records to get 1+1+1 = 3.
Count the Number of Tables in a SQL Server Database
I have a SQL Server 2012 database called MyDatabase. How can I find how many tables are in the database?
I'm assuming the format of the query would be something like the following, but I don't know what to replace database_…