表中數據的查詢
製作人：丁琪 QQ：854804038
一、在market數據庫中：
說明：
market數據庫三張表(customers,goods,orders)
goods商品表(name商品名，storage庫存量，supplier供應商，status商品狀態，price商品價格)
orders訂單表(orderid訂單編號，goodsname商品名，customerid客戶編號，quantity訂貨數量，ordersum訂貨金額，orderdate訂貨日期)
1、從goods表中查詢所有商品信息：select * from goods
2、從customers表中查詢客戶的姓名和電話：select lastname as '用戶姓名',tel as '用戶電話' from customers
3、查詢customers表，顯示客戶編號和客戶姓名，使customerid列顯示的列名爲“客戶編號”，將lastname和firstname列組合起來成爲結果集中的“姓名”列：select customerid as '客戶編號',(lastname+'，'+firstname)as '姓名' from customers
4、查看哪些貨品有訂單。(查詢訂單表中商品名，去掉重複商品名)：select distinct goodsname as '商品名' from orders
5、查看訂貨金額最大的前三筆訂單：select top 3 ordersum as '訂貨金額' from orders order by ordersum desc
6、查看貨品“tv”的貨存量情況：select name,storage from goods where name='tv'
7、查看庫存量大於4的貨品：select name as '貨品名稱',storage as '庫存量' from goods where storage>4
8、查詢發生在2007/4/17日到2007/4/18日之間的訂單：select orderid,goodsname,customerid,quantity,ordersum,orderdate from orders
where orderdate>='2007-4-17'and orderdate<='2007-4-19'
9、查詢北京、上海、天津三地的客戶：select firstname,lastname,city from customers where city='北京'or city='上海'or city='天津'
10、查詢電話號碼第一位不是8的客戶：select firstname,lastname,tel from customers where tel not like '8%'
11、查詢所有customers表中沒有登記電話號碼的客戶：select * from customers where tel is null
12、查詢貨品爲"tv"且訂貨金額大於5000的訂單：select * from orders where goodsname='tv' and ordersum>5000
13、查找goods表中最貴的定價：select max(ordersum)as '最貴的定價'from orders
14、查詢客戶的個數：select count(customerid) as '客戶的個數' from customers
15、查詢訂單表中每一種貨品的訂貨總數：select goodsname as '商品名',sum(quantity) as '訂貨數量' from orders group by goodsname
16、查詢訂貨總數大於500的貨品：select sum(quantity) as '訂貨數量',goodsname as '商品名' from orders group by goodsname
having sum(quantity)>500
17、查詢在2007/4/18日之後的訂單的金額：select ordersum as '訂貨金額',orderdate as '訂貨日期' from orders where orderdate>'2007-4-18'
18、查詢在2007/4/18日之後的訂單的金額，並統計每種貨品的訂單總金額啊：select orderid,goodsname,customerid,quantity,ordersum,orderdate from orders
where orderdate>'2007-04-18' order by goodsname compute sum(ordersum) by goodsname
