计数值出现在MySQL的列中

Question

试着到处寻找这个，但我的搜索没有给我任何答案。 想要计算“郊区”一栏中出现“悉尼”这个词多少次

CustomerId  FirstName   LastName    StreetAddress   Suburb  PostCode
C001    James           Smith       400 Kent St     Sydney      2000
C002    Maria           Carpenter   333 Smith St    Westmead    2145
C003    Dennis          Miller      214 Uni Rd      Sydney      2000

我希望它能提供如下结果：

numCustomersFromSydney
                    2

Answer 1

使用这个简单的查询：

select count(*) as numCustomersFromSydney from table where Suburb = "Sydney";

Answer 2

使用COUNT（）和别名：

SELECT
    COUNT(Suburb) AS numCustomersFromSydney
FROM
    yourtable
WHERE
    Suburb = 'Sydney'