现在的自己已经不怕mysql,已经熟悉了sql “搜索优化专家有时候都无法顾全所有,更何况ORM” 两种方法执行 sql原生语句 tablename.objects.raw() - 这样的语句,只能执行 select,只能执行 查询 执行 update, insert 等操作 from django.db import connections, transaction cursor = connections['my_db_alias'].cursor() # Your code here...…

前言 本节我们来讲讲EF Core中的原始查询,目前在项目中对于简单的查询直接通过EF就可以解决,但是涉及到多表查询时为了一步到位就采用了原始查询的方式进行.下面我们一起来看看. EntityFramework Core Raw SQL 基础查询(执行SQL和存储过程) 啥也不说了,拿起键盘就是干,如下: public class HomeController : Controller { private IBlogRepository _blogRepository; public HomeC…

Raw SQL Queries Entity Framework allows you to query using LINQ with your entity classes. However, there may be times that you want to run queries using raw SQL directly against the database. This includes calling stored procedures, which can be help…

原文 Executing Raw SQL Queries using Entity Framework While working with Entity Framework developers mostly use LINQ to Entities to query database. However, at times you may need to execute raw queries against the database. A common scenario is when yo…

Thanks to Core Data. Even without learning SQL and database, you’re able to perform create, select, update and delete operation. However, for those with database background, you may want to know the exact SQLs executed behind the scene. To enable SQL…

django原生sql查询,默认返回的是元祖.如果想返回字典格式,需要自行封装: http://www.360doc.com/content/17/0802/11/9200790_676042880.shtml…

Django查询SQL语句 # 1 res=models.Book.objects.all() # print(res)#<QuerySet [<Book: Book object>, <Book: Book object>, <Book: Book object>, <Book: Book object>, <Book: Book object>, <Book: Book object>]> #2 res=models.…

django显示SQL语句 有时候我们使用模型查询数据,但是并不知道具体执行的SQL语句到底对不对.那么可以通过下面的方法打印出具体执行的SQL语句.这样有助于调试: queryset = MyModel.objects.all() queryset.query.__str__() 参考: https://stackoverflow.com/questions/3748295/getting-the-sql-from-a-django-queryset…

Entity Framework Core allows you to drop down to raw SQL queries when working with a relational database. This can be useful if the query you want to perform can't be expressed using LINQ, or if using a LINQ query is resulting in inefficient SQL bein…

一:linq 对ef来说不是唯一性的query... 二:Entity Sql 1. esql => entity sql... [类sql的语言] 和sql差不多,但是呢,不是sql... using (SchoolDBEntities db = new SchoolDBEntities()) { //Querying with Object Services and Entity SQL string sqlString = "select Value s from SchoolDBE…