SQL-简单查询
/* 人员:LDH 功能:SQL-简单查询 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 '国家' = country, COUNT(1) AS '员工个数' FROM HR.Employees GROUP BY country; -- Expression SELECT '订单日期' = orderdate, YEAR(orderdate) AS '订单年份' FROM Sales.Orders;
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本文链接:https://www.cnblogs.com/LifeDecidesHappiness/p/9328649.html
版权声明:本博客所有文章除特别声明外,均采用 BY-NC-SA 许可协议。转载请注明出处!
声援博主:如果您觉得文章对您有帮助,可以扫一扫,任意打赏,您的鼓励是博主的最大动力!
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