大约有 6,000 项符合查询结果（耗时：0.0399秒） [XML]
Using an RDBMS as event sourcing storage
If I were using an RDBMS (e.g. SQL Server) to store event sourcing data, what might the schema look like?
6 Answers
...
Get first day of week in SQL Server
...-- Magic convertion of monday to 1, tuesday to 2, etc.
-- irrespect what SQL server thinks about start of the week.
-- But here we have sunday marked as 0, but we fix this later.
SET @DOW = (@DOW + @@DATEFIRST - 1) %7
IF @DOW = 0 SET @DOW = 7 -- fix for sunday
RETURN DATEADD(DD, 1 - @DOW,...
A dependent property in a ReferentialConstraint is mapped to a store-generated column
... had left the foreign key part of the relationship as the default given by SQL Server 2008 Management Studio, which was the primary key fields of the child table, not the column I had created to contain the foreign key value.
– robaker
Mar 5 '12 at 10:23
...
PDO's query vs execute
...
query runs a standard SQL statement and requires you to properly escape all data to avoid SQL Injections and other issues.
execute runs a prepared statement which allows you to bind parameters to avoid the need to escape or quote the parameters. ...
Google Tag Manager 入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...后加。
基本概念：
Container：
也就是容器了，容器里会包括相关的代码和判断加载逻辑，可以从：Container Settings里查看复制加载脚本。
Tag：
代码段，如一段Google Analytics代码，一段百度统计代码，tag归属于当前的Container，tag...
How do I execute a stored procedure once for each row returned by query?
...
use a cursor
ADDENDUM: [MS SQL cursor example]
declare @field1 int
declare @field2 int
declare cur CURSOR LOCAL for
select field1, field2 from sometable where someotherfield is null
open cur
fetch next from cur into @field1, @field2
while @@FET...
Possible to do a MySQL foreign key to one of two possible tables?
...s not possible
);
There's no way to model Polymorphic Associations using SQL constraints. A foreign key constraint always references one target table.
Polymorphic Associations are supported by frameworks such as Rails and Hibernate. But they explicitly say that you must disable SQL constraints ...
Backup/Restore a dockerized PostgreSQL database
I'm trying to backup/restore a PostgreSQL database as is explained on the Docker website, but the data is not restored.
10 ...
Add primary key to existing table
...imary key,otherwise will cause error. Because there is one primary key for sql table.
First, you have to drop your old primary key.
MySQL:
ALTER TABLE Persion
DROP PRIMARY KEY;
SQL Server / Oracle / MS Access:
ALTER TABLE Persion
DROP CONSTRAINT 'constraint name';
You have to find the con...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...驱动模型基于开源的libev实现。
我认为，libeasy不同于其它的网络框架比如tbnet，muduo。tbnet，muduo等网络框架的目的就是向应用层暴露出简单的发包和收包的接口，让应用层从底层发包和收包的处理细节中解放出来，使得应用层...