SQL-简单查询
/*人員：LDH功能：SQL-簡單查詢日期：2018-7-18*/USE TSQLFundamentals2008;
GO-- Select some columns' information.
SELECT empid,lastname,firstname,address,city,country
FROM HR.Employees;-- GROUP BY
SELECT '國家' = country,COUNT(1) AS '員工個數'
FROM HR.Employees
GROUP BY country;-- Expression
SELECT '訂單日期' = orderdate,YEAR(orderdate) AS '訂單年份'
FROM Sales.Orders;
轉載于:https://www.cnblogs.com/LifeDecidesHappiness/p/9328649.html
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