Question

在Mysql中，FIND_IN_SET用于查找集合中的值。我在SQLite中尝试了FIND_IN_SET，但它不是SQL关键字。我用谷歌搜索，但我没有得到答案。如果有人知道，请告诉我SQLite中FIND_IN_SET的替代方法。

Answer 1

如果您只需要一个真/假值而不是索引，那么您可以使用LIKE子句：

(',' || column_name || ',') LIKE '%,value,%'

Answer 2

我们可以将更改等查询写入hibernate critearea

我的旧查询

select * FROM game_detail WHERE content_id=176 and FIND_IN_SET(12,group_master_id)

新查询

select * 
  FROM game_detail
 WHERE content_id=176
   and (group_master_id LIKE '%12,%'|| group_master_id LIKE '%,12,'|| group_master_id LIKE '%12')

Answer 3

这是我的旧查询

String query =“SELECT a.content_id，a.content_name，a.image_name，a.image_path，a.rating，d.content_type_name” +“来自content_master a，category_content_mapping b，” +“game_detail c，content_type_master d” +“其中a.content_id = b.content_id” +“和c.content_id = a.content_id” +“和a.content_type_id = d.content_type_id” +“和b.category_id ='”+ category_id +“'” +“和find_in_set（'”+ group_master_id +“'，c.group_master_id）” +“和a.is_active ='Y'和b.is_active ='Y'和c.is_active ='Y'” +“由b.content_mapping_id命令DESC限制0,3”;

hibernate中的标准使用像find_in_set的替代

    Session session=new Configuration().configure().buildSessionFactory().openSession();
    Criteria criteria=session.createCriteria(ContentMaster.class);
     criteria.setFetchMode("CategoryContentMapping", FetchMode.JOIN);
    criteria.setFetchMode("GameDetail", FetchMode.JOIN);
    criteria.createAlias("categoryContentMappings","cat");
     criteria.createAlias("contentTypeMaster", "ctm");
    criteria.createAlias("gameDetails","game");
    criteria.add(Restrictions.eq("cat.categoryMaster.categoryMasterId", 9));

    criteria.add(Restrictions.disjunction()
    .add(Restrictions.like("game.groupMasterId","%12,%"))
    .add(Restrictions.like("game.groupMasterId","%,12,%"))
    .add(Restrictions.like("game.groupMasterId","%12%")));
    criteria.add(Restrictions.eq("isActive", "y"));
    criteria.add(Restrictions.eq("cat.isActive", "y"));
    criteria.add(Restrictions.eq("ctm.isActive", "y"));
    criteria.addOrder(Order.desc("cat.contentMappingId"));

在SQLite中替代FIND_IN_SET？

3 个答案: