我的数据是这样的:
data1_qqq_no_abc_ccc
data1_qqq_abc_ccc
data2_qqq_no_abc_ccc
data2_qqq_abc_ccc
data3_qqq_no_abc_ccc
data4_qqq_no_abc_ccc
data4_qqq_abc_ccc
...
现在我想获取数据具有子字符串 _no_abc_ccc 但没有 _abc_ccc 的字段。在上面的例子中,它的data3
我正在尝试为它创建一个查询。 粗略的是
select SUBSTRING_INDEX(name, 'abc', 1)
from table1
where SUBSTRING_INDEX(name, 'abc', 1) not LIKE "%no"
and NOT IN (select SUBSTRING_INDEX(name, '_no_abc', 1)
from table
where name LIKE "%no_abc");
最佳答案
像这样(?)
create table t (
col text
);
insert into t
values
('data1_qqq_no_abc_ccc'),
('data1_qqq_abc_ccc'),
('data2_qqq_no_abc_ccc'),
('data2_qqq_abc_ccc'),
('data3_qqq_no_abc_ccc'),
('data4_qqq_no_abc_ccc'),
('data4_qqq_abc_ccc');
select f from (
select SUBSTRING_INDEX(col, '_', 1) as f, SUBSTRING_INDEX(col, '_', -3) as s from t
) tt
group by f
having
count(case when s = 'no_abc_ccc' then 1 end) > 0
and
count(case when s like '%qqq_abc%' then 1 end) = 0
关于mysql - 带有子查询的 SQL 查询,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52504612/