Question

我的桌子看起来像这样。

如果roved_by_asm = 1且roved_by_rsm = 0，则mystatus列应为PENDING

否则，如果核准的_by_asm = 0和核准的_by_rsm = 1，则mystatus列应为“待处理”

否则，如果核准的_by_asm = 0和核准的_by_rsm = 0，则mystatus列应为PENDING

否则，如果核准的_by_asm = 1和核准的_by_rsm = 1，则应批准mystatus列

否则mystatus列应为DECLINED。如何使用SQL实现此功能，我将MySQL用作数据库。

这是我的代码：

create view view1 

as 

select *


 case 

  when approved_by_asm = 0 and approved_by_rsm = 0 THEN 'PENDING'

  when approved_by_asm = 0 and approved_by_rsm = 1 THEN 'PENDING'

  when approved_by_asm = 1 and approved_by_rsm = 0 THEN 'PENDING'

  when approved_by_asm = 1 and approved_by_rsm = 1 THEN 'APPROVED'

  else 'DECLINED' 

  end mystatus 

from loan_coooler ;

Answer 1

请考虑以下内容，如果没有其他说明，则可以通过较少的输入演示相同的逻辑...

DROP TABLE IF EXISTS my_table;

CREATE TABLE my_table
(a TINYINT NULL,b TINYINT NULL);

INSERT INTO my_table VALUES
(NULL,NULL),
(0,NULL),
(NULL,0),
(1,NULL),
(NULL,1),
(0,0),
(1,0),
(0,1),
(1,1);

SELECT *
     , -- AND NOTE THE COMMA!!! 
       CASE WHEN a+b < 2 THEN 'pending' WHEN a+b = 2 THEN 'approved' ELSE 'declined' END x 
  FROM my_table;
+------+------+----------+
| a    | b    | x        |
+------+------+----------+
| NULL | NULL | declined |
|    0 | NULL | declined |
| NULL |    0 | declined |
|    1 | NULL | declined |
| NULL |    1 | declined |
|    0 |    0 | pending  |
|    1 |    0 | pending  |
|    0 |    1 | pending  |
|    1 |    1 | approved |
+------+------+----------+

根据另一张桌子上的条件更新一张桌子

1 个答案: