继承映射策略的三种策略 There are following three different approaches to represent an inheritance hierarchy in Code First: Table per Hierarchy (TPH): This approach suggests one table for entire class inheritance hierarchy. Table includes discriminator column wh…
DEBUGGING STORED PROCEDURES Over the past several weeks, we’ve been working on debugging a stored procedure bug for a client. Coming from a software development background, I looked at the procedure like any piece of code — how can I debug the progra…
CREATE function [dbo].[split](@aString varchar(),@pattern varchar()) returns @temp table([Sid] [, ) NOT NULL ,a varchar()) --实现split功能 的函数 --说明:@aString,字符串,如a:b:c:@pattern,分隔标志,如 : as begin declare @i int set @aString=rtrim(ltrim(@aString)) set @i=c…
本函数用途:返回一个Table 在Oracle中实现,范例: --在Types中: create or replace type objTable as object ( s_usercode varchar2(), s_username varchar2() ); CREATE OR REPLACE TYPE tabTemp AS TABLE OF objtable; --在Function中: --使用Pipeline管道函数和Pipe row() create or replace fun…
本文转自:http://www.rad.pasfu.com/index.php?/archives/150-Insert,-Update,-and-Delete-Destination-table-with-SSIS.html Previously I’ve wrote about design and implementation an UPSERT with SSIS. UPSERT is about Update existing records, and Insert new recor…
--将给定的逗号分隔的数字字符串转换为Table CREATE FUNCTION [dbo].[fu_Split](@strString nvarchar(4000)) RETURNS @Result TABLE(Value int) AS BEGIN DECLARE @x xml SELECT @x = CAST('<A>' + REPLACE(@strString,',','</A><A>') + '</A>' AS xml) INSERT INTO @…
Oracle Table Function在Oracle9i时引入.完美的兼容了view和存储过程的长处: 应用举例: 1.Table()函数: set feedback off create or replace type type_int_date_varchar2 as object (i integer, d date, v varchar2(99)) / create or replace type table_int_date_varchar2 as table of type_in…
想用ef来写一个统计字段的语句,如下所示 select sum(price) as price_total, sum(amount) as amount_total from table1 发现似乎实现不了,ef只能 dbContext.Table.Sum(e=>e.price);dbContext.Table.Sum(e=>e.amount)这样一个一个查,没办法一次查询多个聚合函数字段 经过我的研究后,我发现可以曲线救国. dbContext.). Select(g => new {…
/* *参数说明: 第一个参数为要转化的字符串,第二个参数为字符串中间的分隔符 */ ),)) )) as begin ) set @SourceSql=@SourceSql+@StrSeprate while(@SourceSql<>'') begin )) insert @temp values(@ch) ,),'') end return end 使用场景为 需要拼接字符串与其他select结果作为in条件的时候使用 或者是其他用途 使用方法示例:…
CREATE FUNCTION [dbo].[fn_SplitStringToTable] ( @p_Input VARCHAR(MAX), @p_Delimeter CHAR() = ',' ) RETURNS @l_Table TABLE ( Id INT IDENTITY(, ), Value VARCHAR(), Position INT, Length INT ) BEGIN DECLARE @l_Position INT, @l_Value VARCHAR() SELECT @l_P…
commands : show sys connect sys as sysdba or connect system as sysdba logout or disc clear screen or cle screen (utlsample.sql —> unlock scott tables.sql —> all tables data.sql —> add data into tables) connect scott/tiger start C:\utlsample.sq…
1. Introduction 1.1. About 1.2. Sphinx features 1.3. Where to get Sphinx 1.4. License 1.5. Credits 1.6. History 2. Installation 2.1. Supported systems 2.2. Compiling Sphinx from source 2.2.1. Required tools 2.2.2. Compiling on Linux 2.2.3. Known comp…
LAST UPDATE: 1 Dec 15, 2016 APPLIES TO: 1 2 3 4 Oracle Database - Enterprise Edition - Version 7.0.16.0 and later Oracle Database - Standard Edition - Version 7.0.16.0 and later Oracle Database - Personal Edition - Version 7.1.4.0 and later I…
一.Introduction Sakila可以作为数据库设计的参考,也可作为实验数据.我是用作数据仓库和ODI学习的实验数据. The Sakila sample database was developed by Mike Hillyer, a former member of the MySQL AB documentation team, and is intended to provide a standard schema that can be used for examples i…
定义函数获取某结点下所有子结点: CREATE FUNCTION [dbo].[fn_GetSubGroupInfoById] ( @id AS INT --某分组Id ) RETURNS @SubGroups TABLE ( [GroupId] INT, [ParentGroupId] INT, [Level] INT ) AS BEGIN DECLARE @level AS INT INSERT INTO @SubGroups SELECT [GroupId], [ParentGroupId…
