FOX News contributor and George Washington University law professor Jonathan Turley analyzes the breaking news of the indictment of former FBI Director James Comey. GILLIAN TURNER, FOX NEWS, 'SPECIAL ...

最近在搞新项目，一直在迭代，这期接到个新需求，统计商户近 1天、7天、30天、全部的订单量。 一般而言这种统计类需求都不会直接查库，而是交由数仓同学统计，然后回写到业务表或者业务同学直接读数仓表。 但是由于这是新项目，还没接数仓，并且量还没 ...

This package provides utilities for working with Django querysets so that you can generate the SQL that you want, with an API you enjoy. SELECT parent.*, Count(child.id) as child_count FROM parent ...

Though SQL (Structured Query Language) for databases has proved to be indispensable through decades of use, differences among SQL versions can challenge a software developer. For example, Microsoft's ...

项目组联系我说是有一张 500w 左右的表做 select count(*) 速度特别慢。 SQL 如下，仅仅就是统计 api_runtime_log 这张表的行数，一条简单的不能再简单的 SQL： select count(*) from api_runtime_log; 我们先去运行一下这条 SQL，可以看到确实运行很慢，要 40 多秒左右，确实很不 ...

When it comes time to migrate your SQL workloads to Azure, you have a choice of two main deployment options: SQL Server on Azure Virtual Machines and Microsoft Azure SQL Database. Each offers its own ...

很多 SQL 查询都是以 SELECT 开始的。不过，最近我跟别人解释什么是窗口函数，我在网上搜索”是否可以对窗口函数返回的结果进行过滤“这个问题，得出的结论是”窗口函数必须在 WHERE 和 GROUP BY 之后，所以不能”。于是我又想到了另一个问题：SQL 查询的执行 ...