计算此查询的记录数 - 之前不同对的计数

Question

This is my T-SQL query code:

SELECT DISTINCT 
    StateProvince, City
FROM
    adventureworks.SalesLT.Address
WHERE 
    CountryRegion LIKE 'Canada' 
    AND StateProvince != 'Quebec'
ORDER BY 
    StateProvince, City

I tried to use this, but it did not work out

SELECT  
    COUNT (DISTINCT StateProvince, City) OVER (PARTITION BY )
FROM
    adventureworks.SalesLT.Address
WHERE 
    CountryRegion LIKE 'Canada' 
    AND StateProvince != 'Quebec'
ORDER BY 
    StateProvince, City

Answer 1

that is better to use GROUP BY in T-SQL for aggregate functions like COUNT, SUM and so on.

SELECT COUNT(*)
From adventureworks.SalesLT.Address
WHERE CountryRegion LIKE 'Canada' AND StateProvince != 'Quebec'
GROUP BY City, StateProvince
ORDER BY StateProvince, City