编写多个查询

Question

我已经编写了下面给出的查询，用于使用两个参数获取数据。您能否为此建议正确的 SQL 语法。

SQL 查询：

FMResultSet *resultOfDesiredCuisine = [db executeQueryWithFormat:@"select * from dishes where cuisineId IN (select cuisineId from cuisines where  Lower(cuisineName) like %@) and 
        categoryID IN \"(select categoryID from categories where Lower(categoryName) like %@)",cuisineName,categoryName];

Answer 1

SQLite 不能使用%@ 语法，而是使用?

FMResultSet *resultOfDesiredCuisine = [db executeQueryWithFormat:@"SELECT * FROM dishes WHERE cuisineId IN (SELECT cuisineId FROM cuisines WHERE LOWER(cuisineName) like ?) AND 
        categoryID IN (SElECT categoryID FROM categories WHERE LOWER(categoryName) LIKE ?)", cuisineName, categoryName];