Question

SELECT TXCM_CATEGORY_ID,
       TXCM_CATEGORY_NAME,
       TXCM_MAIN_CATEGORY_ID,
       TXCM_PRT_CATEGORY_ID,
       CASE
          WHEN TXCM_PRT_CATEGORY_ID = 3097 THEN TXCM_PRT_CATEGORY_ID = 0
          ELSE TXCM_PRT_CATEGORY_ID = 6
       END
  FROM TXODOC_CATEGORY_MASTER;

请帮帮我......谢谢

Answer 1

尝试这样的事情：

SELECT TXCM_CATEGORY_ID,
       TXCM_CATEGORY_NAME,
       TXCM_MAIN_CATEGORY_ID,
       TXCM_PRT_CATEGORY_ID,
       CASE
          WHEN TXCM_PRT_CATEGORY_ID = 3097 THEN  0
          ELSE 6
       END AS TXCM_PRT_CATEGORY_ID
  FROM TXODOC_CATEGORY_MASTER;

Answer 2

我担心你的CASE陈述有点搞砸了。

correct syntax就是这样。

简单CASE表达式：

CASE input_expression 
    WHEN when_expression THEN result_expression [ ...n ] 
    [ ELSE else_result_expression ] 
END

搜索CASE表达式：

CASE
    WHEN Boolean_expression THEN result_expression [ ...n ] 
    [ ELSE else_result_expression ] 
END

如果我没有弄错你的话，你可以使用搜索过的CASE表达式，就像这样。

SELECT
    TXCM_CATEGORY_ID,
    TXCM_CATEGORY_NAME,
    TXCM_MAIN_CATEGORY_ID,
    TXCM_PRT_CATEGORY_ID,
    CASE TXCM_PRT_CATEGORY_ID
        WHEN 3097 THEN 0
        ELSE 6
    END
FROM TXODOC_CATEGORY_MASTER

我的查询中缺少关键字错误

2 个答案: