Question

我正在尝试在Oracle上发出sql请求，但我有点问题。我这句话要翻译，我不知道怎么样。你能帮助我吗？我怎么翻译呢？：（

IF(CODE="fuu")
THEN(SELECT bar FROM TABLE)
ELSE(we return 0)

建议。

编辑：

我的要求就是那样

SELECT distinct
  A, B, C, D, E,
  SUM(F+G+H) AS "FGH",
  SUM(I -(FGH)) AS "I",
  CASE WHEN code='fuu' THEN bar ELSE 0 END AS AS "What I need"
FROM
  TABLE
WHERE 
  A=20
GROUP BY
  A, B, C, D, E;

这个解决方案有效，但我没有很好的答案。实际应该是A = 20 - > bar = 7598而不是0;

Answer 1

SQL中的case表达式等同于其他语言的IF语句：

CASE WHEN condition THEN value1 [ ELSE value2 ] END

我猜你正在寻找这样的东西：

SELECT distinct
  A, B, C, D, E,
  SUM(F+G+H) AS "FGH",
  SUM(I -(FGH)) AS "I",
  CASE WHEN CODE='fuu' THEN bar ELSE 0 END As "What I need"
FROM
  TABLE
WHERE 
  A=20
GROUP BY
  A, B, C,  D, E, "What I need"

如果在ORACLE上的ELSE条件

1 个答案: