ORA-00939: CASE 语句中的函数参数太多

Question

我的案例陈述中出现 ORA-00939: too many arguments for function 错误。

我已经尝试将其拆分为多个 CASE 语句，但仍然出现相同的错误。

CASE WHEN l.fridge_door_modela_id = 'II-SH' THEN 'IW' 
     WHEN l.fridge_door_modela_id = 'IIC-SH' THEN 'IW' 
     WHEN l.fridge_door_modela_id = 'CD' THEN 'RPFX' 
     WHEN l.fridge_door_modela_id LIKE 'EXCR%' THEN SUBSTR(fridge_door_modela_id, 0, INSTR(fridge_door_modela_id, 'EXCR'),1)
     WHEN l.fridge_door_modela_id LIKE 'EX%' THEN SUBSTR(fridge_door_modela_id, 0, INSTR(fridge_door_modela_id, 'EX'),1) 
     WHEN l.fridge_door_modela_id LIKE '%-%' THEN SUBSTR(fridge_door_modela_id, 0, INSTR(fridge_door_modela_id, '-'),1) 
     ELSE 'CHECK CODE' 
     END AS Division

Answer 1

SUBSTR(fridge_door_modela_id, 0, INSTR(fridge_door_modela_id, 'EXCR'),1)

上述 SUBSTR 的语法不正确。正确的语法是：
```
SUBSTR( string, start_position [, length ] )
```
此外，substr的索引从1开始，而不是0。

在SQL*Plus中执行，可以清楚的看到具体的错误，看下面的error:

SQL> WITH DATA AS(
  2  SELECT 'abcdEXCRijkl' fridge_door_modela_id FROM dual
  3  )
  4  SELECT SUBSTR(fridge_door_modela_id, 0, INSTR(fridge_door_modela_id, 'EXCR'),1)
  5  FROM DATA;
SELECT SUBSTR(fridge_door_modela_id, 0, INSTR(fridge_door_modela_id, 'EXCR'),1)
                                                                             *
ERROR at line 4:
ORA-00939: too many arguments for function


SQL>

使用正确的语法:

SQL> WITH DATA AS(
  2  SELECT 'abcdEXCRijkl' fridge_door_modela_id FROM dual
  3  )
  4  SELECT SUBSTR(fridge_door_modela_id, 1, INSTR(fridge_door_modela_id, 'EXCR', 1, 1)-1)
  5  FROM DATA;

SUBS
----
abcd

SQL>

ORA-00939: CASE 语句中的函数参数太多

ORA-00939: too many arguments for function in CASE Statement

sql

oracle

syntax

arguments

substr