sql - 使用计数匹配更新嵌套 sql

Question

以下 SELECT 查询工作正常：

select
    StringField_1
    , StringField_2
    , StringField_3
    , COUNT(*)
from my.table
where StringField_1 in (
    select StringField_1
    from my.table
)
group by
    StringField_1
    , StringField_2
    , StringField_3
having
    COUNT(*) > 10
    and StringField_3 like '.*some_string_here.*'
;

结果：

|StringField_1  | StringField_2 | StringField_3 |
|-------------- | ------------- | ------------- |

（0 行受影响）

但是具有上述输出的 UPDATE 失败：

update my.table
set
    StringField_1 = 'CLEAR'
    , numField_1 = 0
where StringField_1 in (
    select
        StringField_1
        , StringField_2
        , StringField_3
        , COUNT(*)
    from my.table
    where StringField_1 in (
        select StringField_1
        from my.table
    )
    group by
        StringField_1
        , StringField_2
        , StringField_3
    having COUNT(*) > 10 and StringField_3 like '.*some_string_here.*'
);

出现以下错误：

ERROR=非法选择列表不能同时包含语句'update my.table set StringField_1 = 'CLEAR', numField= 0 where StringField_1 in (select StringField_1, StringField_12, StringField_13, COUNT(*) from my.table where StringField_1 in (select StringField_1 from my.table) group b...', at or near 'group'

有什么线索吗？

Answer 1

您的子查询应该只返回一个列 (StringField_1)

另外，where StringField_1 in (select StringField_1 from my.table)是多余的，你不需要它。

我还将where StringField_3 like '.*some_string_here.*'up 移到 where 子句中，因为这意味着要聚合的行更少，但结果应该是相同的。

update my.table 
set StringField_1 = 'CLEAR', numField_1 = 0 
where StringField_1 in 
(
 select distinct StringField_1
 from my.table 
 where StringField_3 like '.*some_string_here.*'
 group by StringField_1, StringField_2, StringField_3 
 having COUNT(*) > 10 
);

Answer 2

该IN子句只能返回一列：

where StringField_1 in (select StringField_1 
                        from my.table 
                        group by StringField_1, StringField_2, StringField_3 
                        having COUNT(*) > 10 
                            and StringField_3 LIKE '.*some_string_here.*');

Answer 3

您不能在这样的子查询中返回多个列。此外，无需使用以下内容：

where StringField_1 in (select StringField_1 from my.table) 

尝试这样的事情：

update my.table
set StringField_1 = 'CLEAR', 
    numField_1 = 0
where StringField_1 in (
    select StringField_1
    from my.table 
    group by StringField_1, StringField_2, StringField_3 
    having count(*) > 10 
        and StringField_3 like '.*some_string_here.*'
)