Mysql結果行到字符串，UNION

Question

我有一個名爲tblClients與下一個字段的表：idClient，名稱，信用，債務。

Create table tblClients(idClient int,name varchar(20), credit int, debt int); 
insert into tblClients values(1,'Guillermo',1000,0),(2,'Jess',5000,2000); 

我要歸類的債務類型像

debt = 0 NOT    DEBTOR 
debt between 0 AND 1000  LOW DEBTOR 
debt between 1001 AND 2000 MEDIUM DEBTOR. 

如果我讓這個查詢我得到的債務人類型。

SELECT name AS 'Client',debt AS 'Debtor Type' FROM tblClients WHERE debt = 0; 
SELECT name AS 'Client',debt AS 'Debtor Type' FROM tblClients WHERE debt BETWEEN 1 AND 1000; 

我怎樣才能把標籤DEBTOR，LOW DEBTOR或MEDIUM DEBTOR在列，而不是債務的債務是多少？

Answer 1

試試這個：

SELECT name AS Client, 
CASE 
    WHEN debt = 0 THEN 'Not Debtor' 
    WHEN debt BETWEEN 1 AND 1000 THEN 'Low Debtor' 
    ELSE 'Medium Debtor' 
END AS debt 
FROM tblClients