Question

我写了一个查询，我使用SPLIT_STR作为我的一个字段

SELECT id, approved_studied, 
       SPLIT_STR(approved_studied, '||', 8) as dissertation 
       SPLIT_STR(approved_studied, '||', 7) as university
FROM temp_users

现在我想过滤

在哪里论文喜欢'％种植％'或大学喜欢'％牛津％'

如何编写此子查询？这是我到目前为止所提出的：

SELECT P1.approved_studied, P1.dissertation
FROM P1 
WHERE P1.dissertation LIKE '%Planting%' OR university LIKE '%Oxford%' (
     SELECT id, approved_studied, 
            SPLIT_STR(approved_studied, '||', 8) as dissertation 
            SPLIT_STR(approved_studied, '||', 7) as university
     FROM temp_users AS P1
)

这是非常古老的数据和编码:(我试图创建sql小提琴，但它没有让我继续。http://sqlfiddle.com/#!2/3bca40/7

Answer 1

这里不需要子查询，只需添加where条件：

SELECT id, approved_studied, 
       SPLIT_STR(approved_studied, '||', 8) as dissertation,
       SPLIT_STR(approved_studied, '||', 7) as university  
FROM temp_users
WHERE SPLIT_STR(approved_studied, '||', 8) LIKE '%Planting%' AND 
      SPLIT_STR(approved_studied, '||', 7) LIKE '%oxford%'

请注意，您不能在where条件中使用别名。

字符串操作不会运行两次。

如何使用split_str编写子查询

1 个答案: