[英]Possible with one MySQL query? “column contains any of the array's values”
Basically I want to check whether a mysql text column, which contains comma-separated values, contains any of the values contained in an array. 基本上我想检查包含逗号分隔值的mysql文本列是否包含数组中包含的任何值。 I know this can be done with a loop and multiple queries, but I was hoping for a single query.
我知道这可以通过循环和多个查询来完成,但我希望能够进行单个查询。 Is this possible?
这可能吗? Thank you.
谢谢。
I would use a solution like this: 我会使用这样的解决方案:
SELECT
*
FROM
yourtable
WHERE
str RLIKE
CONCAT('[[:<:]]', REPLACE('values,in,the,array', ',', '[[:>:]]|[[:<:]]'), '[[:>:]]')
this will make the following string: 这将生成以下字符串:
'values,in,the,array'
like this: 像这样:
[[:<:]]values[[:>:]]|[[:<:]]in[[:>:]]|[[:<:]]the[[:>:]]|[[:<:]]array[[:>:]]
[[:<:]]
and [[:>:]]
are word boundaries so it will match only whole words, and | [[:<:]]
和[[:>:]]
是单词边界,因此它只匹配整个单词和| is an OR so it will match any of the words. 是一个OR,因此它将匹配任何单词。 Please see fiddle here .
请看这里的小提琴。
SELECT COUNT(*) FROM my_table WHERE (my_column LIKE '%,0,%' OR my_column LIKE '%,1,%');
要么
SELECT COUNT(*) FROM my_table WHERE (my_column REGEXP LIKE '.*,[0-1],.*');
Do you mean 你的意思是
... WHERE my_column LIKE '%first_array_value%' OR my_column LIKE '%second_array_value%'
It will work but very bad because of performance. 由于性能的原因,它会起作用但非常糟糕。 There is also another way
还有另一种方式
... WHERE MATCH (my_column) AGAINST ('first_array_value second_array_value')
but the best way is to change data structure if possible. 但最好的方法是尽可能改变数据结构。
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