Archive for the ‘sql’ Category

View query generated in Linq

Posted: August 19, 2014 in c#, debug, entity framework, linq, sql
Tags: , , ,
///Code below:
var result = from x in appEntities
             where x.id = 32
             select x;

var sql = ((System.Data.Objects.ObjectQuery)result).ToTraceString();

Code:
http://stackoverflow.com/a/1412902

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SQL Server – Drop all tables

Posted: August 1, 2014 in sql
exec sp_MSforeachtable 'DROP TABLE ?'
Caution: Only do this if you’re unsure. You can lose data from a table in case it needs to be rebuilt to make the desired changes.
Hi, i hope this tip hel you…
Management Studio Error : “Saving Changes in not permitted.”
Screen say: "Saving Changes in not permitted."

Screen alert error

The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can’t be re-created or enabled the option Prevent saving changes that require the table to be re-created

The reason for SSMS to go unresponsive is that when some operations (i.e. adding column, changing datatype of any column, etc) happen, it has to do much more work than the actual operation. Let us now examine an operation where we will add a new column to an already existing table.

  • Transaction starts.
  • When a new column is added SSMS renames the existing table to temp table.
  • After that, it creates a new table with new specification.
  • Now, SSMS has two tables: copy of  previous table with data and empty table with new structure.
  • SSMS now starts moving older data from older table to newer table.
  • If there is any error, it rolls back transaction.
  • If there is no error, it commits all the previous operations.
  • Transaction ends.

This feature can be turned off by going to Menu >> Tools >> Options >> Designers >> Uncheck “Prevent Saving changes that

require table re-creation”.
Menu >> Tools >> Options >> Designers >> Uncheck “Prevent Saving changes that require table re-creation”.

Menu Tools Options

Enjoy it.
Reference Link

Query to search in database object contents

Posted: June 5, 2014 in sql
Tags: ,
DECLARE @Search varchar(255)
SET @Search='user'

SELECT DISTINCT
    o.name AS Object_Name,o.type_desc
    FROM sys.sql_modules        m 
        INNER JOIN sys.objects  o ON m.object_id=o.object_id
    WHERE m.definition Like '%'+@Search+'%'
    ORDER BY 2,1

Source

select t.sp_name, sum(t.lines_of_code) - 1 as lines_ofcode, t.type_desc
from
(
 select o.name as sp_name,
 (len(c.text) - len(replace(c.text, char(10), ''))) as lines_of_code,
 case when o.xtype = 'P' then 'Stored Procedure'
 when o.xtype in ('FN', 'IF', 'TF') then 'Function'
 end as type_desc
 from sysobjects o
 inner join syscomments c
 on c.id = o.id
 where o.xtype in ('P', 'FN', 'IF', 'TF')
-- and o.category = 0
 and o.name not in ('fn_diagramobjects', 'sp_alterdiagram', 'sp_creatediagram', 'sp_dropdiagram', 'sp_helpdiagramdefinition', 'sp_helpdiagrams', 'sp_renamediagram', 'sp_upgraddiagrams', 'sysdiagrams')
) t
group by t.sp_name, t.type_desc
order by 1

Source: StackOverflow

How do I view the SQL generated by the entity framework?

var result = from x in appEntities
             where x.id = 32
             select x;

var sql = ((System.Data.Objects.ObjectQuery)result).ToTraceString();

Source: http://stackoverflow.com/questions/1412863/how-do-i-view-the-sql-generated-by-the-entity-framework

I create a extension…

public static class IQueryableExtension
{
     public static String ToTraceSQL(this IQueryable obj) 
     {             
         return ((System.Data.Objects.ObjectQuery)obj).ToTraceString();
     }
}

Using this:

var iQuerableResult = dataBase.BiServico.Take(10);
string myResustSQL = iQuerableResult.ToTraceSQL();

Shazan! =)

hope I have helped!

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