表1：

**sentence**
----------
AB      
AA      
AC      
AEF     
AHF

，但where条件来自另一个

表2

**text**

sentence like '%A%' and sentence like '%B%'

sentence like '%A%' and sentence like '%C%'

sentence like '%A%' and sentence like '%E%' and sentence like '%F%'

我想要这样的结果：

结果

AB
AC
AEF

我该怎么做？谢谢

Answer 1

听起来您需要动态SQL。我建议修复您的数据模型，因此不需要这样做。我认为您可以使用正则表达式来代替存储where条件：

'A.*B|B.*A'
'A.*C|C.*A'
'A.*E.*F|A.*F.*E|E.*A.*F|E.*F.*A|F.*A.*E|F.*E.*A'

注意：还有其他表达逻辑的方法，但我认为这很清楚。

那么您可以做：

select t1.sentence, t2.pattern
from table1 t1 join
     table2 t2
     on regexp_contains(t1.sentence, t2,pattern);

Answer 2

您可以在逻辑条件适当的情况下使用join和concat

Request Method: POST
Request URL: http://127.0.0.1:8000/

Django Version: 2.0.5
Python Version: 3.6.3
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'account']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "C:\Users\HP\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\handlers\exception.py" in inner
  35.             response = get_response(request)

File "C:\Users\HP\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\handlers\base.py" in _get_response
  128.                 response = self.process_exception_by_middleware(e, request)

File "C:\Users\HP\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\handlers\base.py" in _get_response
  126.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "C:\Users\HP\Desktop\muvi_2\account\views.py" in SignUpView
  10.             username = form.cleaned_data['username']

Exception Type: TypeError at /
Exception Value: string indices must be integers

Answer 3

以下是用于BigQuery标准SQL

#standardSQL
SELECT text, sentence
FROM `project.dataset.table1`,
  `project.dataset.table2`, 
  UNNEST(REGEXP_EXTRACT_ALL(text, "'(.*?)'")) re
GROUP BY sentence, text
HAVING MIN(sentence LIKE re)

如果适用于以下问题中的数据

#standardSQL
WITH `project.dataset.table1` AS (
  SELECT 'AB' sentence UNION ALL
  SELECT 'AA' UNION ALL
  SELECT 'AC' UNION ALL
  SELECT 'AEF' UNION ALL
  SELECT 'AHF' 
), `project.dataset.table2` AS (
  SELECT "sentence like '%A%' and sentence like '%B%'" text UNION ALL
  SELECT "sentence like '%A%' and sentence like '%C%'" UNION ALL
  SELECT "sentence like '%A%' and sentence like '%E%' and sentence like '%F%'" 
)
SELECT sentence, text
FROM `project.dataset.table1`,
  `project.dataset.table2`, 
  UNNEST(REGEXP_EXTRACT_ALL(text, "'(.*?)'")) re
GROUP BY sentence, text
HAVING MIN(sentence LIKE re)

结果将是

Row sentence    text     
1   AB          sentence like '%A%' and sentence like '%B%'  
2   AEF         sentence like '%A%' and sentence like '%E%' and sentence like '%F%'  
3   AC          sentence like '%A%' and sentence like '%C%'

从Bigquery中的另一个表运行Where子句

表1：

表2

3 个答案: