搜狐

面试官：MySQL BETWEEN AND 语句包括边界吗？

使用数据库时，我们经常会用到范围查询，今天来聊一聊 MySQL 的 BETWEEN AND 语句。 SELECT* FROMtest3 WHEREidBETWEEN2AND6; 查询结果如下： 可以看到，对 id 做范围查询，包含了边界值2 和 6， 是一个闭区间。 对 date 做范围查询 SELECT* FROMtest3 ...
搜狐

面试官：MySQL JOIN 表太多，你有哪些优化思路？

工作中，我们有时会遇到 MySQL join 表太多的情况，可能来自两个背景，一个是历史老代码，一个是去 o(Oracle) 改造，从 Oracle ...
Hacker

Building An In-memory Database in Go

One of the questions you may encounter during a design interview for a software engineer position is to design an in-memory database. This question has many variations, but usually, it’s something ...
GitHub

006RJ.CreateTable_Event.sql

IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Event]') AND type in (N'U')) IF NOT EXISTS (SELECT * FROM sys.foreign_keys WHERE object ...
GitHub

SQLite: Lift AddForeignKey ops to CreateTable when gen'ing SQL

closed-fixed The issue has been fixed and is/will be included in the release indicated by the issue milestone. type-bug ...