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[英]How to convert a comma separated string into a SET to use in another query in MySQL?
[英]How to query comma separated string?
TABLE_A
column name: list_id
record 1: 1,2,5,6,8
record 2: 1,3,2
record 3: 6,7,2
record 4: 9,8,0
表-B
id ='2';
如何在逗號分隔的字符串中選擇id='2'
記錄? 從上面的例子中,它應該返回記錄1,2和3。
查詢(如何修改此查詢?):
SELECT * FROM Table_a,Table_b WHERE Table_b.id = Table_a.list_id;
使用find_in_set函數,但它沒有優化的方式來規范化您的數據。
SELECT * FROM
Table_a AS a
JOIN Table_b AS b ON FIND_IN_SET(b.id,a.list_id)
這應該適合你
SELECT * FROM Table_a,Table_b WHERE Table_b.id = Table_a.list_id and
concat(',',Table_a.list_id,',') like '%,2,%'
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