[英]SQL - get only numbers including minus value not alphabets and character from a column
I have a column which has numbers(including negative values),alphabets,alphanumeric and single character symbol(like -,&,@). 我有一列包含数字(包括负值),字母,字母数字和单个字符符号(如-,&,@)。
How to get rid of alphabets,alphanumeric and symbols and get the sum of the column. 如何摆脱字母,字母数字和符号并获得列的总和。
I have to use the condition only in select statement not in where condition. 我只需要在select语句中使用条件,而不能在where条件中使用。 Because it should not affect other column results.
因为它不应该影响其他列的结果。
This is what I've tried: 这是我尝试过的:
SELECT COUNT(*), CASE
WHEN REGEXP_LIKE(REMD_PART_CSN, '^-?[0-9]\d*(\.\d+)?$') THEN SUM(REMD_PART_CSN)
ELSE NULL
END
FROM <TABLE>
How about this? 这个怎么样?
SELECT
COUNT(*),
SUM(
CASE
WHEN REGEXP_LIKE(REMD_PART_CSN, '^-?\d+(\.\d+)?$')
THEN CAST(REMD_PART_CSN AS NUMBER)
ELSE 0
END
)
FROM yourtable
Ie for every row, if REMD_PART_CSN
looks like a number, then convert it to a number, else use 0
instead. 即对于每一行,如果
REMD_PART_CSN
看起来像一个数字,则将其转换为数字,否则使用0
代替。 At the end, return the sum of all those values. 最后,返回所有这些值的总和。
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