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How do I delete multiple rows in Entity Framework (without foreach)
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If you don't want to execute SQL directly calling DeleteObject in a loop is the best you can do today.
However you can execute SQL and still make it completely general purpose via an extension method, using the approach I describe here.
Although that ...
How can foreign key constraints be temporarily disabled using T-SQL?
Are disabling and enabling foreign key constraints supported in SQL Server? Or is my only option to drop and then re-create the constraints?
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alternatives to REPLACE on a text or ntext datatype
... . I'm using the REPLACE function. Since the column datatype is NTEXT , SQL Server doesn't allow me to use the REPLACE function.
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What does mysql error 1025 (HY000): Error on rename of './foo' (errorno: 150) mean?
I tried this in mysql:
14 Answers
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Row count with PDO
...et the row count using PDO in PHP? Before using PDO, I just simply used mysql_num_rows .
23 Answers
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SEH stack 结构探索（1）--- 从 SEH 链的最底层（线程第1个SEH结构）说起 -...
... _EXCEPTION_REGISTRATION_RECORD 结构，我们最好准备纸笔记录下它的 stack 变化情况
1. ntdll32!_SEH_prolog4() 构造的 stack 结构
刚进入 ntdll32!_SEH_prolog4() 时的 stack 是下面的图
上面的两个返回地址一个是返回到 ntdll32!_RtlUserThreadStart() 一...
SQL to determine minimum sequential days of access?
... 0) This works by subtracting the supplied date from zero--which Microsoft SQL Server interprets as 1900-01-01 00:00:00 and gives the number of days. This value is then re-added to the zero date yielding the same date with the time truncated.
– IDisposable
Jul ...
What does inverse_of do? What SQL does it generate?
...cumentation, it seems like the :inverse_of option is a method for avoiding SQL queries, not generating them. It's a hint to ActiveRecord to use already loaded data instead of fetching it again through a relationship.
Their example:
class Dungeon < ActiveRecord::Base
has_many :traps, :inverse_...
How to query MongoDB with “like”?
I want to query something with SQL's like query:
39 Answers
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Which SQL query is faster? Filter on Join criteria or Where clause?
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For inner joins it doesn't matter where you put your criteria. The SQL compiler will transform both into an execution plan in which the filtering occurs below the join (ie. as if the filter expressions appears is in the join condition).
Outer joins are a different matter, since the place of...