Question

我有两张桌子。一个用于销售人员，另一个用于销售我希望通过ALPHA排序推销员的名称来命令查询的输出。

这是表结构：

CREATE  TABLE `Salesman` (
  `ID` INT NOT NULL AUTO_INCREMENT ,
  `Name` VARCHAR(45) NULL ,
  PRIMARY KEY (`ID`) );


INSERT INTO `Salesman` (`Name`) VALUES ('Bill');
INSERT INTO `Salesman` (`Name`) VALUES ('John');
INSERT INTO `Salesman` (`Name`) VALUES ('Dave');
INSERT INTO `Salesman` (`Name`) VALUES ('Mark');


CREATE  TABLE `Sales` (
  `ID` INT NOT NULL AUTO_INCREMENT ,
  `Item` INT VARCHAR(45) NULL ,
  `Salemesman_ID` INT NULL ,
  `Total` INT NUll ,
  PRIMARY KEY (`ID`) );

INSERT INTO `Sales` (`Item`, `Salemesman_ID`, `Total`) VALUES ('Pen', '3', '14');
INSERT INTO `Sales` (`Item`, `Salemesman_ID`, `Total`) VALUES ('Rat', '1', '12');
INSERT INTO `Sales` (`Item`, `Salemesman_ID`, `Total`) VALUES ('Car', '2', '1230');
INSERT INTO `Sales` (`Item`, `Salemesman_ID`, `Total`) VALUES('Rabbit', '2', '11');
INSERT INTO `Sales` (`Item`, `Salemesman_ID`, `Total`) VALUES('Towel', '1', '6');
INSERT INTO `Sales` (`Item`, `Salemesman_ID`, `Total`) VALUES('VaporWare', '4','900');

因为Alpha命令中的销售员名称是：Bill，Dave，John，Mark

我需要输出

Rat         1  12              (Bill = 1)
Towel       1  6               (Bill = 1)
Pen         3  14              (Dave = 3)
Car         2   1230           (John = 2)
Rabbit      2    11            (John = 2)
VaporWare   4    900           (Mark = 4)

Answer 1

您可以通过一起加入表格来实现您想要的目标：

select s.*
from sales s join
     SalesMan sm
     on s.Salesman_Id = sm.Id
order by sm.name, sm.id;

我觉得有必要补充说，表名“推销员”似乎对人类的一半只有不必要的限制。

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1 个答案: